Arredondo-Ruiz et al. Designs for energy-efficient cellars: a review 9 Designs for energy-efficient wine cellars (ageing rooms): a review F. ARREDONDO-RUIZ1 , I. CAÑAS1 , F.R. MAZARRÓN1 and C.B. MANJARREZ-DOMÍNGUEZ2 1 School of Agricultural, Food and Biosystems Engineering [Heritage, Landscape, Graphic Documentation and Agroforestry Construction (PADOC) Research Group], Universidad Politécnica de Madrid, 28040, Madrid, Spain; 2 Facultad de Ciencias Agrotecnológicas, Universidad Autónoma de Chihuahua, 31110, Chihuahua, Mexico Corresponding author: Professor Fernando Arredondo, email [email protected] Abstract The wine sector worldwide consumes a considerable amount of energy, with much of it used for cooling and ventilating cellars (ageing rooms). For this reason, the design of energy efficient cellars is increasingly gaining importance. With the aim of developing cellars that require little or no energy to maintain wine maturation conditions constant, this article presents a synopsis of the principles of cellar design for reducing the energy demand of cellars and a graphical review of actual cellars. The principles are based on the implementation of relevant parameters, such as cellar orientation, shape, depth, envelope system, passive cooling mechanisms and shading. A chronology of cellar monitoring and modelling is presented because of its direct influence on the hygrothermal behaviour and design of cellars. Previous studies in the literature were analysed to determine the underlying influence of these parameters on total energy demand and to suggest the best design options. This analysis is also based on the experience of the authors and will be useful for those involved in the design of energy saving wine cellars. Keywords: bioclimatic design, energy efficiency, energy saving, wine cellar, wine comfort Introduction The role of energy in architecture faces serious limitations because of the lack of energy-related research in the architectural literature (Manzano-Agugliaro et al. 2015). Concern about climate change is growing, and so is the demand for information about costs and benefits of mitigating greenhouse gas emissions (Alberini et al. 2018). Interest in the reduction of carbon dioxide emissions has recently expanded to several polluting industries which require improved environmental management (Ratnatunga and Balachandran 2009, Kauffmann and Tebar Less 2010). The environmental impact, however, of the winemaking industry, one of the world’s oldest industries, remains relatively unexplored (Ratnatunga and Balachandran 2009, Christ and Burritt 2013). Although the wine industry is generally perceived as being environmentally friendly (Marshall et al. 2005), its considerable energy consumption aggravates environmental issues (Hughey et al. 2005); wineries directly affect their local ecosystems (Jia et al. 2018). Wine production has moved to energy-intensive above-ground buildings, which are expensive for maintaining suitable temperature and RH. With rising energy prices, it is necessary to promote bioclimatic strategies that reduce energy consumption (Bisson et al. 2002). Efficient heating and cooling designs are one of the best ways to reduce energy costs in buildings (Mazarrón and Cañas 2009). The design of energy efficient buildings must optimise design variables and construction parameters (Omer 2008). For this reason, it is important to identify those design variables directly related to the heat transfer process. As a result, the design phase of a building is crucial in the adoption of sustainable strategies, because implementation costs are much lower during the first phases of construction (Feng 2004, Wang et al. 2006). doi: 10.1111/ajgw.12416 © 2020 Australian Society of Viticulture and Oenology Inc. Energy efficient designs, based on energy saving principles, reduce economic costs over the lifetime of a building because of lower energy consumption. This more than compensates for the higher initial investment as there is less CO2 being emitted into the atmosphere throughout the life cycle of the building (Wang et al. 2006). The objective of the wine-ageing process is to modify the sensory characteristics of wine and to improve wine quality (Pacheco et al. 2012). This stage is the longest in the winemaking process and involves the wine ‘resting’ in oak barrels/casks for several months inside cellars, and evolving for a certain time before bottling. Once bottled, wine is kept under ideal cellar hygrothermal conditions. These conditions during ageing and maturation are fundamental for obtaining sound final products (del Alamo-Sanza and Nevares 2017). Given the economic and cultural importance of wine production worldwide, undertaking research for understanding and minimising the excessive use of energy, related to the construction and operation of cellars, is imperative. Such endeavour is critical to ensure that the sector stays environmentally and economically viable through time. For the promotion of new research and to provide a basis for understanding sustainability in the design and construction of cellars, this article will present a literature review of the key areas of concern currently impacting the design and the construction of cellars. Materials and methods The main objective of this article is to review the climatic and thermal functions of wine cellars. The intention is to clarify the efficiency of the varied typologies, such as underground, above-ground and basement, in reducing energy consumption of cellars. Additionally, it shows the impact of different design strategies for improving wine comfort, that is maintaining ideal temperature and humidity conditions Designs for energy-efficient cellars: a review during wine ageing. An important aspect to highlight about this review is the practical experience of the authors in this area. The study reviewed the literature on the climatic aspects and design principles of wine cellars. The authors searched through six main databases: Scopus, ScienceDirect, Web of Knowledge, Google Scholar, Ingenio and ProQuest. There was no limit to the years searched to provide thoroughness, because the authors consider that the study of cellars is somewhat limited. The search terms were related to ageing rooms, winery, energy consumption, wine comfort and bioclimatic design in articles, titles, abstracts and keywords. The primary keywords (winery, wine, wine comfort and ageing room) were typed into the search engines of the previously mentioned databases separately; afterwards, when the search engines allowed, the authors would limit the search to those articles related to construction, energy consumption and bioclimatic design. When the search engines did not allow certain key words, however, the authors had to skim through the articles individually (regardless of the number of papers presented by the databases) to ensure that no useful article was left undiscovered. The results were classified into the four categories which were applied in this article: (i) efficiency of cellar building types; (ii) bioclimatic principles applicable to cellars; (iii) monitoring and modelling of cellars; and (iv) the influence of sustainability certifications on winery design. Bibliometric analysis Bibliometric analysis of the articles published in the field of energy efficiency in wineries showed a strong concentration of research in a few countries, highlighting in particular Spain and Italy. Dividing each article by the number of research centres involved gave the following results: Spain was responsible for 33.7% of production, followed by Italy (24.2%), USA (8.1%), China (6.7%), Australia (5.4%), Turkey (4.3%) and nine other countries with less than 2% each. Collaboration between centres in different countries was infrequent or non-existent in most cases. International collaboration involving the USA (28.6% of the articles), Australia (40%), Turkey (25%) and France (50%) stand out. In the literature identified, the number of research institutions such as laboratories and sub-centres involved, even within the same university, was also reduced; the average usually being less than two research institutions per article. The centres with the highest weighted production were the Polytechnic University of Madrid (20.1% of the total), University of Bologna (15.8%), the University of California (4%), the University of La Rioja (3.4%) and the University of South Australia (2.5%); the remaining 58 centres involved had less than 1.3% weighted production each. As an approximation of the impact of the publications of each centre, the impact factor (IF) of the journals in which they published was used for its corresponding year. The average IF of all centres was 3.25, although there was a large variation (SD of 3.10) depending on factors, such as the number and age of articles or the journals involved in each case. The University of California stands out with an average IF of 17.49 due to the great impact of a publication in the journal Nature. In the centres with the highest production, the average IF is less than 3.0 (Polytechnic University of Madrid 1.24, University of Bologna 2.5, University of La Rioja 1.27, University of South Australia 2.81). Table 1 Australian Journal of Grape and Wine Research 26, 9–28, 2020 presents the journals involved and the proportion of articles that each centre published in them. The analysis of the keywords defined by the authors shows great diversity in the terms used, with few outstanding keywords. Of the 209 different terms found, only 11% appear in more than one article. The most commonly used terms were wine cellar (seven papers), building design (6), winery (5), winery design (4), energy saving (4), energy simulation (3), wine (3) and energy (3). In the case of two articles there was a large group of keywords: certification, thermal zone, air temperature monitoring, efficiency, underground cellar, energy consumption, thermal inertia, underground building, indoor environment, design standards, wine industry, vernacular architecture, sustainable development and life cycle cost. Individually analysing the words that make up the keywords (and grouping singular and plural), the frequency of some terms increased significantly. Thus, the most prominent were building/buildings (23 times), wine (22), energy (19), thermal (17), design (17), cellar/cellars (13), winery (11), air (10), underground (9), temperature/temperatures (8), system/systems (7), environment (7), sustainable (6), indoor (6), performance/performances (5), simulation (5), solar (5), carbon (5), construction (5), analysis (5), monitoring (4), efficiency (4), ground (4), environmental (4), management (4), bioclimatic (4), saving (4) and heating (4). Efficiency of cellar building types Mazarrón and Cañas (2008) were the first to simultaneously evaluate different building types using the terrain to control indoor hygrothermal conditions. They reported that commercial wineries opt for a variety of solutions for cellars to assure optimal conditions for ageing; they grouped them into five types, which are presented from the most to the least energy efficient (Figure 1). Underground. The cellar has been dug into the ground. Many require no external energy inputs and RH is usually optimal throughout the year without the use of RH enhancing devices (Figures 2, 3). Earth-sheltered or buried. The cellar is at ground level but is completely earth sheltered to recreate the conditions of underground cellars. They can be just as efficient as underground cellars. The literature does not indicate whether RH enhancing devices are needed in this type of construction. Basement. The cellar is just below ground level, creating a cellar below the other facilities. All the walls and floor are thus in contact with the surrounding earth, except for the ceiling, and this can reduce the influence of the earth’s thermal mass. Many basement cellars use humidifiers (Figure 3) to maintain RH at a desirable level. Side-slope. The cellar is up against or dug into a rock or earth slope on at least one side. The parts of the building facing the earth’s thermal mass take advantage of it, so the outside facing parts could bring the outside climate’s influence inside the cellar if they are not properly insulated. The need for RH enhancing devices and/or practices will vary depending on the local conditions and the building’s configuration, with regard to the degree of exposure to the underground and the availability of natural moisture. © 2020 Australian Society of Viticulture and Oenology Inc. 17550238, 2020, 1, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/ajgw.12416 by UACH - Universidad Autonoma de Chihuahua, Wiley Online Library on [02/05/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License 10 9 8 5 5 4 4 3 3 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 4.03 3.78 5.31 8.10 3.40 4.32 – 1.01 2.43 2.36 1.75 2.69 4.07 1.65 0.52 – – 4.17 2.29 3.08 – 3.42 0.34 1.08 – – 1.72 Total No. papers (all centres) © 2020 Australian Society of Viticulture and Oenology Inc. 7 0 0 0 7 0 0 0 0 0 0 0 7 0 0 0 0 7 13 13 13 13 0 13 7 0 0 0 0 0 0 0 0 0 0 9 0 0 0 0 0 0 0 0 17 0 0 0 0 17 9 32 0 0 University of Bologna 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 33 33 0 0 0 University of California University of South Australia University of Southern California University of Siena 0 0 0 0 0 0 0 0 0 0 0 0 0 40 0 0 0 0 0 0 20 0 0 0 0 0 0 0 27 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 55 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 0 Proportion of articles published in each journal (%) Universidad de la Rioja 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 University of Salamanca 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 University of Minho (Continues) 0 0 0 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 University of Maryland Designs for energy-efficient cellars: a review 11 17550238, 2020, 1, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/ajgw.12416 by UACH - Universidad Autonoma de Chihuahua, Wiley Online Library on [02/05/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Building and Environment Energy and Buildings Journal of Cleaner Production Renewable and Sustainable Energy Reviews Applied Thermal Engineering Renewal Energy Journal of Agricultural Engineering Transactions of the ASABE Energies Tunneling and Underground Space Technology Sustainability Advanced Engineering Informatics Agricultural and Forest Meterology American Journal of Enology and Viticulture Applied Engineering in Agriculture Applied Mechanics and Materials Avances en Energias Renovables y Medio Ambiente Business Strategy and the Environment Computers and Electronics in Agriculture Construction and Building Materials Critical Reviews in Food Science and Nutrition Ecological Economics Informes de la Construccion International Journal of Architectural Heritage International Journal of Mathematical Education in Science and Technology Journal of Accounting, Auditing and Finance Journal of Cultural Heritage Journal Mean Journal Impact Factor 2014–2018 Universidad Politecnica DE Madrid Table 1. Main journals with publications on energy efficiency in cellars, shown as a proportion of the total articles of each research centre†. Arredondo-Ruiz et al. Total No. papers (all centres) 1 1 1 1 1 1 1 1 1 1 1 1 Mean Journal Impact Factor 2014–2018 – 1.85 1.13 – – 3.05 40.88 – 2.49 0.93 2.31 1.09 0 0 0 0 0 0 0 0 0 0 0 0 Universidad Politecnica DE Madrid 0 0 0 0 0 9 0 9 0 0 0 0 University of Bologna 0 0 0 0 0 0 33 0 0 0 0 0 University of California †Boxes coloured light grey, grey and black represent the lowest to the highest number of papers per journal. Journal of Ecological Engineering Journal of Food Science Journal of Radioanalytical and Nuclear Chemistry Journal of Industrial Engineering Chemistry Journal of Wine Research Journal of Agricultural Research Nature Rudarsko-Geolossko-Naftni Zbornik Sensors Survey Review Sustainable Development Journal of Performance of Constructed Facilities Journal Table 1. Continued University of South Australia University of Southern California University of Siena 0 0 0 0 0 0 0 0 18 0 0 0 0 40 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 University of Salamanca University of Maryland 0 0 0 0 0 0 0 0 0 0 0 0 University of Minho 0 0 0 0 0 0 0 0 0 0 0 0 Designs for energy-efficient cellars: a review Australian Journal of Grape and Wine Research 26, 9–28, 2020 Figure 1. Main types of cellar construction. Figure 2. A modern underground cellar in the Spanish wine region of Ribera del Duero. Above-ground. In the same fashion as other agricultural and industrial facilities, the cellar is on flat ground. This type of cellar features wine production facilities that include air conditioning systems to control temperature and RH. Since this type of construction requires total insulation and air conditioning, it is the least efficient. Sometimes, however, the other types of construction are not an option. This type of construction will most likely need artificial RH enhancing devices and/or practices. Figure 3. System for modification of RH in a basement cellar with air conditioning near Peñafiel, Spain. © 2020 Australian Society of Viticulture and Oenology Inc. 17550238, 2020, 1, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/ajgw.12416 by UACH - Universidad Autonoma de Chihuahua, Wiley Online Library on [02/05/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License 0 0 0 0 0 0 0 0 0 0 0 0 Proportion of articles published in each journal (%) Universidad de la Rioja 12 The behaviour of each of these construction types, when comparing the external climatic conditions to those on the inside of the cellar, differs extensively. Underground buildings (underground and buried types), cushion external environmental temperature changes, with the help of the large earth mass covering them. Above-ground construction is, in principle, more vulnerable to changes in outside temperature. Ganem et al. (2016) analysed the thermal properties of four cellars and they showed that light insulated envelopes present no thermal inertia but effectively keep the interior from the influence of external conditions. In the case of high mass envelopes, they report that these structures have thermal inertia that moderates the interior temperature and as a counterpart they present greater exchange of energy flows. Due to the need to maintain the temperature of cellars stable for long periods of time, underground and buried types appear to be the most suitable. Above-ground constructions must have other designs allowing the mitigation of annual temperature fluctuations of more than 10 C occurring in all the climatic zones of the Spanish territory: temperature fluctuations in above-ground cellars, exceed 10 C, buried constructions do not exceed 5 C and underground constructions do not exceed 3 C. Although RH is an important condition for wine ageing, controlling it is simple with the use of misters or ventilation systems that do not consume large amounts of energy (Mazarrón and Cañas 2008). Underground cellars One of the first scientifically recorded attempts to study traditional wineries occurred in Spain (Fuentes Pardo et al. 2004). The team presented a methodological approach for the realisation of institutional schemes for recovering traditional agricultural architecture in a regional context. Through this work, they monitored the cellars to assess their thermal behaviour and they graphically documented and analysed more than 800 vintage agricultural buildings (among them, cellars) in Spain to realise their potential for reuse. Later, Fuentes Pardo and Cañas-Guerrero (2006) examined formal and functional characteristics of the vernacular architecture of underground wineries. They documented construction characteristics and details plus excavation techniques and classified underground cellars in the Ribera del Duero region by the type of construction. Soil properties have a decisive effect on interior conditions, as well as on the integrity and durability of underground wine cellars. Most soils present similar plasticity and swelling properties. They are either concentrated in a specific region of the plasticity chart or present zero plasticity. High plasticity soils are uncommon, owing to the higher risk of swelling leading to stability problems in wine cellars. In terms of grain size, silts and sands under 0.4 mm predominate, with a somewhat lower presence of clays. There is no record of wine cellars having been dug in high plasticity soils or where gravels or clean sands predominate. New wine cellars should not be excavated in soils under the previously mentioned conditions of high plasticity (Cañas et al. 2012). Cañas et al. (2012) summarised (Figure 4) the construction process of traditional underground cellars in Spain: 1. The site is selected under parameters, such as topography, ground characteristics and distance to any urban nucleus. Slightly sloped lots are the most adequate for the construction of traditional underground cellars © 2020 Australian Society of Viticulture and Oenology Inc. Designs for energy-efficient cellars: a review 13 Figure 4. Construction process of a traditional underground cellar. [Fuentes (2010) reports that the entrance should face north to decrease sun radiation effects]. 2. Excavation begins by ‘cutting’ the entrance of the future cellar on the slope. 3. Access tunnel excavation begins at the same time as the internal vault reinforcing process. Excess material is placed on top of the tunnel to avoid excess transportation of dug earth, which also works as additional thermal mass. At the same time, the ventilation chimney is dug, using pulleys and buckets to extract debris. 4. Once the tunnel and chimney have been dug, cellar digging begins. The cellar chamber is wider and taller than the access tunnel. When the process is complete, all the winemaking equipment is introduced into the cellar. It is quite common to see ‘underground winery neighbourhoods’ grouped in sets of several dozen wineries (Figure 5). The wineries in each neighbourhood usually have similar characteristics in terms of room shape, type of entrance, construction materials and depth (Nawalany et al. 2017). In those areas where there are large temperature variations, underground construction deeper than 10 m is capable of achieving the highest capacity to reduce outdoor climate variation and maintain thermal stability throughout the year. At such depth, RH is usually high most of the year, which is a Figure 5. A Spanish cellar neighbourhood in the Ribera del Duero region. 17550238, 2020, 1, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/ajgw.12416 by UACH - Universidad Autonoma de Chihuahua, Wiley Online Library on [02/05/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Arredondo-Ruiz et al. Designs for energy-efficient cellars: a review desirable condition. When there is no air conditioning equipment, underground construction is the one assuring the most days in optimal comfort conditions for wine conservation and ageing (Martin and Cañas 2006, Mazarrón and Cañas 2008). Furthermore, Benni et al. (2013) report a reduction in overall energy demand of 100% for heating and 75% for cooling in comparison with that of an above-ground cellar. Cadeddu and Cauli (2017) report that the optimal depth of an underground wine cellar is exclusively related to the frequency (ω) of temperature variation, which depends on the chosen period for wine ageing and by a positive constant κ which describes the thermal characteristics of the soil adjacent to the location of the underground cellar. The optimal depth calculated by the authors leads to two advantages: (i) a reduction by a factor of 23 in the amplitude wave of the temperature function and the result is a reduction of the temperature oscillation at 1 C with a correct design of the winery considering climatic and soil conditions; and (ii) the phase of the temperature wave function at these depths is exactly the opposite at ground level. As a result, dampening of excessive temperature fluctuation occurs, limiting heat transfer mechanisms, such as opening cellar doors, which may increase the temperature of the ageing room beyond the desirable storage temperature of 13 C. In the Argentinian region of Mendoza, Ganem and Coch (2010) highlighted the importance of high thermal mass, since temperature requirements for storage are strict. For that reason, they proposed underground cellars as the best solution since any other solution requires electricity to ensure good quality wine. In 2012, the same authors analysed the trends existing in the construction of new wineries, especially those of Marqués de Riscal and Viña Tondonia (Spain), where wellknown architects designed new facilities. Without thermally monitoring the cellars, they report that energy performance of these facilities is low, because they have to provide air conditioning systems to maintain correct wine-ageing conditions. Berghoef and Dodds (2013) highlight the interest of the Ontario (California) wine industry in being ecological by lowering energy consumption; among the solutions presented, underground cellars were an option. Genís-Vinyals et al. (2015) analysed the ‘fresqueras’, a type of underground construction excavated under dwellings. Their research highlighted the importance of these structures for wine conservation. As it has previously been stated, premises for wine storage and ageing call for a specific indoor climate, which can require a high energy input. In this regard, underground buildings have the potential to reduce energy demand in comparison to conventional above-ground buildings, by exploiting soil temperature, ground-cover (Nawalany et al. 2017) and soil humidity. Constructive solutions based on ground thermal inertia are more effective than other solutions when reducing the effects of outdoor conditions, even when these have air conditioning systems. It is possible to achieve the optimal conditions to preserve wine, with a good design and an adequate amount of terrain, without having to use air conditioning systems (Mazarrón et al. 2012a). The more constant, closer to optimal, temperature of vernacular underground wine cellars is good to slow down the wine ageing process, which results in higher quality wines. In addition, this type of low-energy design can be applied to modern wine cellars (Martin and Cañas-Guerrero 2006, Torreggiani et al. 2018). Excavation and underground wall construction costs are high, so insulation may be seen as a valid alternative when applied to all premises. Underground solutions on the Australian Journal of Grape and Wine Research 26, 9–28, 2020 contrary could be a choice when excavation is needed for some reason (i.e. when deep foundations are mandatory), or in case of specific local building code regulations such as height limits (Barbaresi et al. 2017). Constructive solutions and technological systems that maximise energy efficiency are becoming a standard in the industry. Underground cellars solve this, since they have the ability to provide temperature-peak dampening, thermal wave phase-shifting and temperature variation break-downs. These effects depend on the building itself and on the features of the location; therefore, understanding underground thermal properties and space–time variability of thermal phenomena is fundamental. Building design can take advantage of underground thermal properties to minimise energy demand for temperature control (Fuentes 2010). Basement cellars The interior environment of basements (Figure 6) is not as stable as that of deep underground cellars, since the hygrothermal stability in this type of traditional construction increases with depth, due to the land’s thermal mass. Nonetheless, basements also offer the possibility of wine ageing; they can provide adequate ageing and preservation conditions without the need for air conditioning. Semi-basements, however, offer lower thermal inertia and higher exposure to exterior environmental conditions leading to higher temperature in spring and summer (Mazarron et al. 2013). These cellar types have an acceptable capacity to reduce outdoor variations and it can be an inexpensive solution for indoor climate control. Results are similar to the values obtained by above-ground construction with air conditioning systems functioning for several months (Mazarrón et al. 2012b). In this regard, under certain Spanish conditions, basements can provide optimal wine comfort levels (8–15 C at 60% RH) 96% of the time in spring; 7% in summer; 49% in autumn; and 87% in the winter. As a result, basements do need air conditioning 14.5% of the time (Mazarrón and Cañas 2008). Mazarron et al. (2013) report that typical Spanish wineageing basements are constructed under the actual winery building (fermentation facilities), so they were located below ground level. These structures are in contact with the ground through load-bearing walls, are usually made of 25–35 cm thick reinforced waterproofed concrete to avoid ground leakage. The structures are usually made of Figure 6. Basement cellar in La Rioja, Spain. © 2020 Australian Society of Viticulture and Oenology Inc. 17550238, 2020, 1, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/ajgw.12416 by UACH - Universidad Autonoma de Chihuahua, Wiley Online Library on [02/05/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License 14 Designs for energy-efficient cellars: a review 15 reinforced concrete with cylindrical or rectangular pillars. The upper framework, is also made of reinforced concrete, which is held up by the pillars, serving as paving of the upper winery premises. The normal finish is usually polished concrete. The semi-underground constructions have similar characteristics, but a part of their envelope is in contact with the exterior conditions. Earth-sheltered and semi-buried cellars Earth-sheltered construction is the best alternative to underground construction for maintaining a stable interior temperature (they can keep optimal conditions for over 80% of the time). This type of construction has the advantage of being close to the surface, which makes it easier when designing wider spaces (Mazarrón et al. 2012b). Figure 7 shows a model of a winery that uses gravity to transport the wine throughout the winemaking processes, the final stage being when new wine is stored in wooden barrels at the bottom most right side of the model, where it experiences the ageing process under the influence of the high-mass of the surrounding earth. In this regard, Nawalany et al. (2017) studied the thermal conditions of partially underground cellars, concluding that the cellars may be used for wine storage for ‘the first period of wine treatment’ (without any energy inputs). Moreover, under certain Spanish conditions, earth sheltered cellars can provide optimal wine comfort levels (8–15 C at RH 60%) for 97% of the time in spring; 96% in summer; 61% in autumn; and 67% in the winter. As a result, earth-sheltered cellars do need air conditioning 20% of the time (Mazarrón and Cañas 2008). Above-ground cellars with and without air conditioning When it is not possible to build underground cellars, the analysis of the thermal loads of wineries stresses the importance of insulation. Cellar designers should consider an integrated approach with many factors involved to address the following issues: (i) identifying potential critical issues in energy consumption by the variety of processes taking place at the winery; (ii) finding overlapping positive and negative thermal loads for better system design; (iii) supply the oenologist with useful information to make decisions on how to utilise surplus thermal energy to make other types of wines such as sweet dessert wines; (iv) empower farm management in energy saving decisions; and (v) provide information for future research on energy demand issues (Barbaresi et al. 2017). Fortea-Navarro (2016) describes an above-ground winery located in the variable weather of the Napa Valley, in which 40 cm wide stone-filled gabion walls provide enough thermal mass to buffer the external conditions, much in the fashion of the hygrothermal behaviour presented by basements. Above-ground cellars, however, without air conditioning or ground thermal mass present a lower capacity to reduce outdoor variation because they Figure 7. Model of a modern earth-sheltered winery and its bottom-most cellar in Samaniego (Basque Country) Spain. © 2020 Australian Society of Viticulture and Oenology Inc. Figure 8. Air-conditioned above-ground cellar. have: (i) less control over climate conditions; and (ii) present the least favourable conditions for conservation and ageing, as indoor temperature is usually too high during the summer months, and can be too low in the winter (Mazarrón et al. 2012b,c). Vertical stratification of temperature in above-ground cellars (Figure 8) varies depending on the time of year, and it is directly related to outdoor environmental variations. As a result of this behavioural difference, throughout the year, the number of barrel levels is not significant from October to March in the northern hemisphere. From April to September, however, the number of stacked barrel layers should be reduced in these types of buildings, since the wine stored at the higher levels will be subjected to less favourable conditions: higher and lower temperature, and greater temperature variation during the day (Mazarrón et al. 2012a). In this regard, under certain Spanish conditions, above-ground cellars without air conditioning can provide optimal wine comfort levels (8–15 C at RH 60%) for 52% of the time in spring; 0% in summer; 18% in autumn; and 56% in the winter. As a result, aboveground cellars do need air conditioning 69% of the time (Mazarrón and Cañas 2008). Air-conditioned above-ground cellars (Figure 9) can modify their temperature and RH intervals as required, at the expense of energy consumption and the cost of the equipment (Mazarrón et al. 2012b). For these reasons, the use of air conditioning systems during the summer months is strongly recommended for above ground cellars Figure 9. Above-ground wine ‘cathedral’ provides ample air stratification. 17550238, 2020, 1, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/ajgw.12416 by UACH - Universidad Autonoma de Chihuahua, Wiley Online Library on [02/05/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Arredondo-Ruiz et al. Designs for energy-efficient cellars: a review Australian Journal of Grape and Wine Research 26, 9–28, 2020 cellars, the authors found 33 numerical studies on this topic. Seven of them were methods, five were monitoring models, three were simulation models, three were monitoring simulation models and 11 were pure monitoring studies. The authors categorised the methods and/or models for the examination of the climatic aspects of ageing rooms as follows: (i) graphic representation methods; (ii) methods; (iii) simulation methods; (iv) models; (v) monitoring models; (vi) simulation models; (vii) monitoring simulation models; and (viii) purely monitoring works. Table 4 provides a complete summary of these methods and/or models. The influence of sustainability certifications on winery design Figure 10. Comfort zone and harmful effects. (Mazarrón et al. 2012c, Porras-Amores et al. 2014). The economic feasibility of installing air conditioners depends on the particular conditions at each cellar (Mazarrón et al. 2012c). Bioclimatic principles applicable to ageing rooms Zhou et al. (2016) report that poor communication, design requirements, cultural differences, and low-quality construction are the main factors leading to a winery’s excess of air leakage, poor building insulation and deficient indoor air distribution. For this reason, they developed a methodology for the evaluation of energy usage in wineries by analysing condensation, thermal insulation, air leakage and indoor air distribution. To date, there are few specific publications on architectural bioclimatic principles for wine comfort (Figure 10) in above-ground or in any type of cellar (Rodríguez-Gonzálvez et al. 2014). For this reason, the authors will summarise all applicable principles in Table 2, which is considered one of the highlights of this section. These principles are more suitable for above-ground cellars but the other types of construction may benefit as well. Research on ageing room hygrothermal conditions with monitoring and modelling The monitoring and modelling of cellars has been fundamental for the description of the thermal behaviour of such structures. These activities have supported the quest towards the achievement of ideal hygrothermal conditions inside cellars at the lowest possible energy cost during the building’s operation. The importance of hygrothermal monitoring stems from two problems: (i) the costly energy input for maintaining ideal hygrothermal conditions; and (ii) wine loss through excess wine evaporation and its governing parameters during wine ageing in oak barrels (diffusion and surface emission coefficients) (Ruiz de Adana et al. 2005). There is a loss range between 1 and 9% of the volume of the wine inside the wood barrels, depending on cellar conditions (Ruiz de Adana et al. 2005, Martin and Cañas-Guerrero 2006). Wine loss can actually be beneficial in small amounts as it helps oxygenate the wine, but the oxygen level is usually high enough to produce an important financial impact (Ruiz de Adana et al. 2005). Table 3 summarises the research on monitoring and modelling of cellars. To answer the question which methods and/or models have been proposed for examining the climatic aspects of The increasing attention to sustainability is pushing the construction sector to build more sustainable buildings (Navarro et al. 2017). In this regard, the wine sector has placed environmental sustainability in a priority position, due to both the consumer’s demand for more information regarding the environmental impact of their purchases and the growing interest in environmental issues (Moscovici and Reed 2018). As a result, several sustainability metrics have been proposed. The global dissemination of sustainability indexes and that of their configurations are treated as proxy variables for the appraisal of ‘green buildings’. Current evaluation systems range from energy utilisation assessment systems to life cycle analysis and total quality evaluation schemes (Navarro et al. 2017); improving energy efficiency is the underlying factor behind them. Pushed by positive consumer perception and financial advantages, the industry has opened to certifications, based on previous experience from the construction sector. They are clearly different from other certifications, such as organic and biodynamic, in the sense that they are broader in scope since they cover many factors, such as construction (bioclimatic), energy saving devices/processes, alternative energy sources and water treatment/recycling. The main findings show considerable interest on the part of the winemaking industry with an exponential growth in the number of certifications. Although there are many differences, all certifications propose formation components and technological updates. Certification systems differ in mechanics, which lead to issues related to transferability and consumer confusion (Berardi 2012). Other issues include varying certification costs, lack of transparency of certified information and no cooperation between certification bodies. Given that all of the certifications plan on growing, more research is needed into sustainability certification, especially from the consumer perspective (Moore and Engstrom 2004). Recent research related to winery certifications is scarce. Penela et al. (2009) presented a methodological proposal for calculation of corporate carbon footprint (CCFP) based on the ‘method composed of financial accounts’ abbreviated as MC3. Marras et al. (2015) conducted a carbon footprint analysis (CFA) in a mature vineyard in the south of Italy. They claim their study represents an advance since most CFAs focus only on the winemaking process. The main limitation of the study, however, is that it presents data only from a single Italian vineyard. Giacomarra et al. (2016) provided evidence that wineries under voluntary standards showed better economic performance than non-certified cellars. However, the only standard in their study with a weak regard to building/construction was ISO 14001 (environmental management systems standard) because it covers © 2020 Australian Society of Viticulture and Oenology Inc. 17550238, 2020, 1, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/ajgw.12416 by UACH - Universidad Autonoma de Chihuahua, Wiley Online Library on [02/05/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License 16 Designs for energy-efficient cellars: a review 17 Table 2. Bioclimatic principles applicable to cellars. Bioclimatic principle Concepts Authors’ notes Shape Building shape largely influences building sun exposure (Tang 2002). Compactness Index (CI): a ratio expressing the To reduce outdoor exposure and improve CI, relationship between the building’s volume, its most aerial cellars are usually integrated into outer surface and its façade (Wang et al. 2006). other winery premises, exposing the least number of their surfaces to the outside environment. In many cases, even the roof is protected from the outside by another room on top; this same principle is used in basement cellars. Sun radiation can increase cooling energy by up to 25% (Elasfouri et al. 1991). Very compact building: building with a high volume to surface ratio. Its exposed heat gaining or losing surface is as small as possible (Feng 2004). In underground cellars the use of vaulted shapes is common for structural reasons. Many above-ground cellars have high ceilings to favour air stratification (Figure 8) and protect the wine located in the first few metres (3 or 4) above the ground. Shape determines total surface exposed to the outside thus energy losses occur. Ratio between outer surface and total constructed volume should be kept small as possible tending to the ideal case of a hemisphere (Tang 2002). The combination of shape and orientation allows energy savings of up to 36% (Elasfouri et al. 1991). The increase of external building surface for the same volume (lower compactness index) is proportional to the increase in the energy required for heating (Aksoy and Inalli 2006). Shapes such as vaults and domes improve the shape factor. To reduce outdoor exposure and improve CI, most aerial cellars are usually integrated into other winery premises, exposing the least number of their surfaces to the outside environment. In many cases, even the roof is protected from the outside by another room on top; this same principle is used in basement cellars. Orientation Orientation is the most important and most studied bioclimatic principle (Aksoy and Inalli 2006). The minimisation of sun radiation exposure in the summer led Gupta and Ralegaonkar (2004) to optimise orientation of a building for various shape factors. Their method avoids summer solar radiation to the highest degree. What is usually intended in the design of wineries, is to use the orientation to regulate the temperature of the wine cellar. Orientation can influence the temperature of the wine cellar, for example, orienting it to the south facilitates the action of the warm winds, generally increasing temperature. Its effect depends on the thermal insulation of the cellar. Amount of sun radiation received depends on azimuth on wall (Sulaiman and Olsina 2014). Studies of architectural elements with different slopes and angles (Chwieduk and Bogdanska 2004), reveal that the maximisation of solar energy gain throughout the year requires that the azimuth angle of the surface should be approximately 15 . Sometimes the orientation takes advantage of certain microclimates, such as in the region of sherry wines, where the action of the marine winds is favourable during the ageing process. A low-cost measure reducing energy The best orientation of rectangular buildings demand, increases performance of other for wine comfort is when longest façade faces passive measures, and reduces interior north. heating/cooling load. In the case of cellars in the northern hemisphere, the longest or main façade should be oriented north to keep internal temperature within wine comfort range (Pacheco-Torgal and Jalali 2012). Ageing rooms with small ground plans are less sensitive to changes in orientation (Morrissey et al. 2011). Ground plan surface is the most crucial factor regarding adaptability to changes in orientation (Depecker et al. 2001). It is more difficult for larger ageing rooms to provide acceptable energy efficiency (Depecker et al. 2001). Optimal orientation increases energy savings through the avoidance of heat gains from the sun (Manzano-Agugliaro et al. 2015). Building envelope Foundations, roofs, walls, doors and windows and the period when airconditioning is required are the factors with the greatest impact on energy consumption (Chwieduk and Bogdanska 2004). Heat transfer formulas: design parameters affecting energy conservation are shape, orientation and façade thermophysical properties (Pacheco-Torgal and Jalali 2012). Within the envelope, the surface that is exposed such as above-ground, basement has a considerable influence. The key element is hygrothermal behaviour. Envelope determines interior hygrothermal conditions and heating/ cooling needs (Ahearn 1982) Two assessment methods for economic evaluation of building façade insulation: (a) Çomaklı and Yüksel (2003) used Present Worth Factor (PWF) to calculate optimal insulation thickness. Other variables that are difficult to study are biodynamic systems. Examples of wineries with biodynamic ageing such as Bodega Las Encomiendas (DO Ribera del Guadiana) and wineries that apply biodynamic principles but in vine cultivation such as: Cavas Recaredo (DO Penedés); Finca Mas Blanc (DOQ Priorat); Celler Joan d’Anguera CDO Montsant) and Torremilanos (DO Ribera del Duero). (Continues) © 2020 Australian Society of Viticulture and Oenology Inc. 17550238, 2020, 1, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/ajgw.12416 by UACH - Universidad Autonoma de Chihuahua, Wiley Online Library on [02/05/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Arredondo-Ruiz et al. Designs for energy-efficient cellars: a review Australian Journal of Grape and Wine Research 26, 9–28, 2020 Table 2. Continued Bioclimatic principle Concepts Authors’ notes (b) Lollini et al. (2006) carried out threefold analysis taking energy, economy and environment into account. Both analyses agree on the existence of a threshold where more insulation thickness will not bring significant energy savings. Pulselli et al. (2009) conducted an energy and energy-based cost- benefit analysis. Results showed that building envelope performance relies on technologies related to external climate conditions. Chel and Tiwari (2009) analysed building envelope environmental impact through the estimation of thermal performance, energy payback time, embodied energy, CO2 emissions mitigation potential and carbon credits. Manio glu and Yılmaz (2006) evaluated the economics of the envelope and the heating system (during its operation period) in terms of thermal comfort. Table 3. Recent research related to winery certifications and their influence on winery design. Country Year Title Proposal or research aim Reference Spain 2009 A methodological proposal for corporate carbon footprint and its application to a wine-producing company in Galicia, Spain Authors presented a methodological proposal for corporate carbon footprint (CCFP) calculation based on the ‘method composed of financial accounts’ abbreviated as MC3. Results showed the source of its environmental impacts and the carbon footprint of each of its activities. Penela et al. (2009) Italy 2015 Carbon footprint assessment on a mature vineyard Authors conducted a carbon footprint analysis (CFA) in a mature vineyard in the south of Italy. They claim their study represents an advance since most CFAs focus only on the winemaking process. The main limitation of the study, however, is that it presents only data from a single Italian vineyard. Results showed that external carbon sources such as fuel combustion and soil management are largely responsible for the GHG emissions of the vineyard. Marras et al. (2015) Italy 2016 The integration of quality and safety concerns in the wine industry: the role of third-party voluntary certifications Authors provided evidence that the economic performance of wineries under voluntary standards was better than that of non-certified cellars. The only standard, however, in their study with a minimal regard to building/construction was ISO 14001 because it covers many facets of environmental concerns. Giacomarra et al. (2016) Spain 2016 Environmental proactivity and environmental and economic performance: evidence from the winery sector Authors validated a model using a sample of 312 Spanish wineries. The article indirectly addresses building design in energy related issues. Barba-Sánchez and AtienzaSahuquillo (2016) USA 2017 A self-sustainable winery, an advanced passive building and remote monitoring of environments in wineries Please refer to the ‘The influence of sustainability certifications on winery design’ section for a full summary of Boulton’s work in his article. Boulton (2017) Spain, Turkey, France 2017 Eco-innovation and bench-marking of carbon-footprint data for vineyards and wineries in France and Spain Authors proposed a novel carbon footprint approach, claiming that their approach might be convenient for pushing small and medium enterprises towards eco-innovation and sustainability due to its simplicity. Their approach will allow wineries to identify the most relevant aspects in carbon footprint terms, as well as potential improvements, starting from the vineyard and up to the moment when the bottled and labelled wine leaves the premises. Results showed that establishing best practices and resource consumption optimisation, corporate carbon footprint figures achieve a reduction of almost 25%. Navarro et al. (2017) © 2020 Australian Society of Viticulture and Oenology Inc. 17550238, 2020, 1, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/ajgw.12416 by UACH - Universidad Autonoma de Chihuahua, Wiley Online Library on [02/05/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License 18 Year 2005 2005 2005 2006 2007 2008 Spain Spain Spain Spain © 2020 Australian Society of Viticulture and Oenology Inc. Portugal Spain Monitoring models Purely monitoring works Monitoring models Models Purely monitoring works Purely monitoring works Category The effect of traditional wind vents called zarceras on the hygrothermal behaviour of underground wine cellars in Spain An evolutionary wireless sensor network to monitor wine cellars Comparison of analytical and on-site temperature results on Spanish traditional wine cellars A Fickian model for calculating wine losses from oak casks depending on conditions in ageing facilities Study of the thermal behaviour of traditional wine cellars: the case of the area of ‘Tierras Sorianas del Cid’ (Spain) Comparison of hygrothermal conditions in underground wine cellars from a Spanish area Title (Continues) Cañas and Mazarrón (2009) Costa et al. (2007) Authors presented the first step of an evolutionary project named WSNet-WineCellar, which aims at evaluating current techniques in resource-efficient environmental data gathering, through a network of ‘off-the-shelf’ software to gather information communicated by a wireless sensor network, placed in each one of the barrels of an Oporto winery. Result: the oenologist has a constant source of information that could provide permanent control of the ageing conditions. Authors studied the effect of air extracting chimneys (zarceras) on overall ageing room hygrothermal performance. Results: having ‘zarceras’ in underground ageing rooms improved hygrothermal performance since they did not affect hygrothermal conditions significantly inside the cellar, promoting ventilation and aiding in maintaining a suitable level of RH and helping in the removal of CO2 produced during fermentation. Martin and Cañas-Guerrero (2006) Ruiz de Adana et al. (2005) Cañas-Guerrero and Martin (2005) Martin and Cañas-Guerrero (2005) Reference Authors used a simple analytical model to predict soil temperature. They studied the potential of this model to predict interior cellar temperature, without taking ventilation into account. Results: the model was accurate at predicting interior temperature range but it was not as accurate at predicting the development of interior temperature over time. The model simulates wine loss during ageing and it was validated through the comparison of the experimental data with that of actual cellars. Results: the impact of exterior temperature, access tunnels and ventilation chimneys on interior conditions of underground cellars was demonstrated by describing the behaviour of the previously mentioned built mechanisms during hot and cold weather outside the ageing rooms. Authors monitored temperature and RH. They highlighted the impact that traditional construction techniques have on modern construction practices from the viewpoint of energy-saving. Results: ‘underground constructions have great potential for passive cooling of wine cellars in continental climate’. Authors measured RH and temperature of underground traditional cellars for 2 weeks during the summer and 2 weeks in the winter. Results: the interior cellar temperature was more constant than outside. Research aim and results Designs for energy-efficient cellars: a review 19 17550238, 2020, 1, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/ajgw.12416 by UACH - Universidad Autonoma de Chihuahua, Wiley Online Library on [02/05/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Country Table 4. Summary of research on internal conditions of cellars. Arredondo-Ruiz et al. 2012 2011 Hungary Spain 2011 Spain Simulation models Method Purely monitoring works Purely monitoring works Monitoring models Ground thermal inertia for energy efficient building design: a case study on food industry A meta-design approach to agroindustrial buildings: a case study for typical Italian wine production Effect of variation of atmospheric pressure on the 222Rn activity concentration in the air of a wine cellar Factors of influence in the distribution of mould in the air in a wine cellar Exponential sinusoidal model for predicting temperature inside underground wine cellars in a Spanish region Title Authors studied 4 year hygrothermal data from several wineries and concluded that underground construction ensured better wine quality at much lower energy input. Results: ageing rooms that provide ideal temperature and RH throughout the year without air conditioning were possible if the design of underground cellars is correct. Based on case studies, authors describe a methodology to calculate winery optimal facility size under Italian conditions. Results: the methodology allows designers to preview potential layout solutions. The largest underground cellar district in Europe (about 1200 wineries) is located near the Danube in a loess in the Hajós winery area (Hungary). Authors monitored natural radioactivity by measuring the activity of 222Rn. Results: authors compared the results of the model with the experimental data, finding that current levels were several times above the recommended level. Authors monitored a winery to study the development of several mould species in a commercial cellar. Results: less ventilated areas with higher mould populations in the air presented less diverse mould species than more ventilated areas, suggesting that the species established there were more permanent. More ventilated areas presented more diverse but at the same time less concentrated species of moulds in the air. Authors developed a mathematical model to determine the annual air temperature cycle inside traditional underground wine cellars in the Spanish region of ‘Ribera del Duero’. Results: indoor air temperature was mainly conditioned by the average depth of the cellar and outside air temperature. The adjustment, however, between internal and external cellar temperature varied according to the season. In spring and summer, the stability was excellent and the influence of the soil temperature was much greater than that of the outside air temperature. In autumn and winter, the increased ventilation reduced temperature adjustment. Research aim and results Mazarrón et al. (2012b) Torreggiani et al. (2011) Gy} orfi and Csige (2011) Ocón et al. (2011) (Continues) Mazarrón and Cañas (2008) Reference Australian Journal of Grape and Wine Research 26, 9–28, 2020 © 2020 Australian Society of Viticulture and Oenology Inc. 17550238, 2020, 1, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/ajgw.12416 by UACH - Universidad Autonoma de Chihuahua, Wiley Online Library on [02/05/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License 2011 2008 Spain Category Designs for energy-efficient cellars: a review Italy Year Country Table 4. Continued 20 Year 2012 2012 2012 2013 2014 Spain Spain Italy © 2020 Australian Society of Viticulture and Oenology Inc. Spain Argentina Monitoring models Purely monitoring works Simulation models Monitoring simulation models Purely monitoring works Category Comfort reliability evaluation of building designs by stochastic hygrothermal simulation Assessment of basement construction in the winery industry Farm wineries design: preliminary indications for integrating energy efficiency in building modelling An assessment of using ground thermal inertia as passive thermal technique in the wine industry around the world Natural ventilation in underground wine cellars Title Authors propose a methodology for measuring the reliability of a building’s thermal design to sustain indoor hygrothermal comfort under different weather circumstances. Results: the methodology estimated expected frequency and the duration of discomfort events in every thermal zone and was based on the combination of a numeric model with stochastic simulation techniques and occurrence probability. (Continues) Sulaiman and Olsina (2014) Mazarron et al. (2013) Tassinari et al. (2012) Authors assessed the influence of a variety of building design solutions on a cellar’s energy performance. The effort was designed with the intention of estimating the differences in construction costs. Results: the importance was highlighted of proper design solutions, whose performance can be quantifiable in the design phase by means of computer aided modelling and simulation. Authors monitored four basements and one semi-basement belonging to commercial cellars in Spain for several years. Results: internal environmental conditions had greater stability than external and were adequate for wine-ageing and preservation without the need for air conditioning systems. The existence of vertical temperature differences was confirmed. In semi-basement cellars, temperature exceeding an acceptable level for wine-ageing lasted for several weeks. Mazarrón et al. (2012a) Mazarrón et al. (2012) Reference Authors studied the suitability of underground cellars in providing adequate wine ageing conditions without energy inputs. They studied the temperature of these underground structures by means of computer simulation with the help of a software called EnergyPlus. Results: underground cellars were advantageous for wine ageing due to the thermal inertia of the ground and the ventilation systems applied to them. Authors monitored the natural ventilation systems of underground cellars, focusing on the entrance tunnel, ventilation chimney and the cave itself to assess their influence structures on interior cellar conditions. Results: during heat periods, natural ventilation influence was negligible on indoor environment, despite permanently open ventilation grilles on door and chimney. During cold periods natural ventilation increased. Research aim and results Designs for energy-efficient cellars: a review 21 17550238, 2020, 1, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/ajgw.12416 by UACH - Universidad Autonoma de Chihuahua, Wiley Online Library on [02/05/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Country Table 4. Continued Arredondo-Ruiz et al. 2014 2014 Italy Spain 2014 China Purely monitoring works Graphic representation method Simulation methods Purely monitoring works Method Influence of winery age and design on the distribution of airborne moulds in three wine cellars Geomatics and geophysics synergies to evaluate underground wine cellars Underground cellar thermal simulation: definition of a method for modelling performance assessment based on experimental calibration The research of constant temperature and humidity air conditioning system of underground cellar Farm winery layout design: size analysis of base spatial units in an Italian study area Title Explained the influence of a cellar’s design and construction date on mould developmet: Results: the need highlighted for effective planning of temperature and RH control systems and design policies during the design phase of the cellar. Presented a non-invasive multidisciplinary evaluation of the internal and external physical state of underground cellars. They integrated topographic geotechnologies along with geophysical prospecting equipment. Results: the combination of these techniques allowed an accurate graphic documentation of the structures, crack detection, structural damages as well as the existence of empty spaces behind the walls. Ocón et al. (2014) (Continues) Rodríguez-Gonzálvez et al. (2014) Barbaresi et al. (2014) Wang et al. (2014) Authors applied an air conditioning system to control humidity and temperature of an underground cellar in Beijing where many thousands of bottles were stored. After installing the system, they monitored the winery and all its ageing rooms to check its effectiveness. Results: the use of a distributed programmable logic controller (PLC) kept constant temperature and humidity at high efficiency, low energy consumption and remote operation, while meeting the environmental requirements of various types of wine storage operations. Authors studied three possible temperature simulation models of a basement cellar. They used the EnergyPlus software and validated their results with data from the monitoring of the basement cellar for one full year. Applying both the model described by Mazarrón and Cañas (2008) to the walls of the winery and the model from Kusuda and Achenbach (1965) to the ground. Result: the method can be applied to the design of highly efficient buildings and systems. Torreggiani et al. (2014) Reference Authors propose a methodology for calculating optimal size for the various spaces needed for producing Italian wines. They also defined a set of parametric equations for estimating spatial units according to production size on the basis of the correlations found in their study. Results: quantitative relationships were formulated to calculate overall farm winery size according to its hypothetical production capacity. Research aim and results Australian Journal of Grape and Wine Research 26, 9–28, 2020 © 2020 Australian Society of Viticulture and Oenology Inc. 17550238, 2020, 1, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/ajgw.12416 by UACH - Universidad Autonoma de Chihuahua, Wiley Online Library on [02/05/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License 2014 2014 Italy Category Designs for energy-efficient cellars: a review Spain Year Country Table 4. Continued 22 Year 2014 2015 2015 2015 2015 2015 Italy China Italy Italy © 2020 Australian Society of Viticulture and Oenology Inc. Italy Italy Monitoring simulation models Monitoring models Method Monitoring simulation models Purely monitoring works Simulation models Category Performance assessment of thermal simulation approaches of wine storage buildings based on experimental calibration Experimental analysis of thermal interaction between wine cellar and underground Indoor air temperature monitoring: a method lending support to management and design tested on a wine-ageing room Effective predictions of the airflows involving barrels in a wine-ageing room Distributed wireless monitoring system for ullage and temperature in wine barrels Numerical simulations of the airflows in a wine-ageing room: a lattice Boltzmann-immersed boundary study Title Authors validated a method to assess above-ground building modelling through optimised sensor placement. The correctness of the use of the term ‘air-wall’ as a horizontal partition was also verified. Building-underground interaction is site dependent, therefore, accurate design must look into every aspect of the thermal interface between them. Results: designers are helped to optimise cellar energy modelling. Authors thermally monitored underground cellars. They also monitored adjacent land temperature. With the monitoring data they adapted the equations in a way that better suited the experiment. Results: their equations proved suitable for reproducing the surveyed phenomena. Authors validated an accurate and cost-effective method for quantifying temperature monitoring in indoor spaces, through an experimental temperature test, taking place in an Italian ageing room. Results: the method allows the identification of homogeneous temperature zones, the number of sensors needed and the minimum data recording frequency. Authors measured the airflow around the barrels of an underground cellar; indoor air temperature monitoring is a basic activity giving useful information in many fields. Specific installation procedures, however, have not been defined in scientific literature. Results: it is now possible to arrange barrels for the minimisation of wine evaporation and mould formation. Authors designed a low-cost wireless communication system for monitoring ageing room barrels, so the ageing is more controlled. They controlled both barrel temperature and filling level, obtaining real-time data. Results: the information provided by the system can help to more accurately control final product quality. Authors propose a methodology for the calculation of air-flow in a wine-ageing cellar. Results: the findings could be used by wine companies for the prediction of the airflow present in wine-ageing rooms. Research aim and results Barbaresi et al. (2015) Tinti et al. (2015) Barbaresi et al. (2015b) Barbaresi et al. (2015a) Zhang et al. (2015) De Rosis et al. (2014) Reference (Continues) Designs for energy-efficient cellars: a review 23 17550238, 2020, 1, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/ajgw.12416 by UACH - Universidad Autonoma de Chihuahua, Wiley Online Library on [02/05/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Country Table 4. Continued Arredondo-Ruiz et al. 2018 2017 Italy Portugal 2017 USA Purely monitoring works Monitoring simulation models Monitoring models Purely monitoring works Graphic representation method Distributed monitoring system for precision enology of the tawny port wine ageing process Effects of different architectural solutions on the thermal behaviour in an unconditioned rural building. The case of an Italian winery Experimental calibration of underground heat transfer models under a winery building in a rural area Remote monitoring of winery and creamery environments with a wireless sensor system Assessment of underground wine cellars using geographic information technologies Title Authors propose a distributed oak barrel monitoring system inside two adjacent wineries. The interconnected sensor network continuously measured wine temperature, pH, redox potential, wine dissolved oxygen, room temperature and room RH. Results: the system was able to detect differences between wood barrels and between storage conditions. Further results will be reported once the project, under which this research is carried out, is completed. Authors, through simulation, tested several different architectural elements for the improvement of the thermal behaviour of unconditioned wineries, through energy simulations validated on an Italian case study, they compared the data obtained from the simulations under a variety of temperature ranges. Results: the greater the combination of architectural solutions for building improvement, the better the thermal behaviour became. Authors report three-dimensional thermal data models calibrated on experimental underground soil affected by a winery building in rural Italy. Temperature varied in space and time and it was directly influenced by ground, climate and building characteristics. Results: the importance of taking the previously mentioned aspects into account for the improvement of the design of underground spaces for geothermal energy utilisation was indirectly demonstrated. Authors demonstrate the characteristics of a newly designed wireless sensor system. The system’s ability to provide real-time data in one convenient location differentiates it from older systems. It is not only a data collection system but it also provides immediate data visualisation, enabling informed decision-making, based on past and current environmental-conditions measurements. Results: effective CO2 decrease in fermentation spaces, when a sensor was installed, was demonstrated. The nature of air composition depicted the cyclic nature and variation of batch operations. The resulting information provided a better cellar design basis. Authors analysed underground cellars using geographic information technologies by means of a laser scanner. Results: a fast and accurate field technique was developed for representing underground spaces. Post-processing time, however, can be slow but the results were accurate. Research aim and results Morais et al. (2018) Torreggiani et al. (2018) Tinti et al. (2017a,b) Madrid et al. (2017) Herrero et al. (2015) Reference Australian Journal of Grape and Wine Research 26, 9–28, 2020 © 2020 Australian Society of Viticulture and Oenology Inc. 17550238, 2020, 1, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/ajgw.12416 by UACH - Universidad Autonoma de Chihuahua, Wiley Online Library on [02/05/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License 2018 2015 Spain Category Designs for energy-efficient cellars: a review Italy Year Country Table 4. Continued 24 many facets of environmental concerns. Barba-Sánchez and Atienza-Sahuquillo (2016) validated a model using a sample of 312 Spanish wineries. The article indirectly addresses building design in energy related issues. Boulton (2017) reported the construction of a new winery at the University of California, Davis, which aimed to create a completely offgrid building with its own independent energy and water utilities to: (i) eliminate hydrocarbon fuels from its operation; (ii) capture and sequester carbon dioxide from its fermentations; and (iii) create a zero-carbon footprint facility. As a result, the UC Davis winery complex achieved the Leadership in Energy and Enironmental Design (LEED) Platinum certification, and it was ranked in the top 3% of all LEED Platinum buildings finished in that period; it was also the first water and energy self-sustainable building. Navarro et al. (2017) proposed a novel carbon footprint approach, claiming that their approach might be convenient for pushing small and medium enterprises towards eco-innovation and sustainability because of its simplicity. They presented data for promoting eco-innovation, since their inventory can enable wineries to benchmark their data with that from the study. Moreover, their approach will allow wineries to identify the most relevant aspects in carbon footprint terms, as well as, potential improvements, starting from the vineyard and working up to the moment that bottled and labelled wine leaves the premises. Results showed that the establishment of best practices and resource consumption optimisation achieved a 25% reduction in CCFP figures. It is quite clear that both building construction and building operation throughout the lifetime of the building affect the environment. As a result, building certifications aim to reduce energy use, atmospheric and environmental impact, water use, construction materials and construction and demolition waste. Finally, the creation of environmental building codes is obviously not an object of science. Instead, it is a social and antagonistic process in which some interests are censored and others are strengthened. The existence of clashing interests is evident in the complex multitude of codes and green building standards which surface as a response to current environmental circumstances. Profit-making construction certification codes, such as LEED, Building for Environmental and Economic Sustainability and Building Research Establishment Environmental Assessment Method, provide some examples. Antagonistic standards that do not overlap can create a situation where no compromise is possible because there is no benefit. All building standards are, in this regard, social accords favouring a precise group of beneficiaries because they incorporate the interests of those who actually make the standards (Moscovici and Reed 2018). Discussion It is clear from the bibliometric analysis undertaken that researchers and institutions should pay more attention to inter-institutional cooperation and agreements. In contrast, in the case of the impact of cellar design factors and components on overall thermal performance (at low energy cost), two main categories were recognised based on climatic aspects: underground, above-ground as well as a variety of cellars combining both types of construction. Designs for energy-efficient cellars: a review 25 preservation conditions with a good design and an adequate amount of terrain without using energy intensive air conditioning devices. Excavation and underground wall building, however, are costly operations. Nonetheless, underground cellars could benefit from modern technologies such as electronically operated fans to aid in ventilation if RH or temperature are too high. Above-ground cellars Above-ground cellars rely on low-mass insulation and high energy demanding air conditioning devices to prevent outside conditions from influencing the interior as opposed to underground cellars which provide high thermal mass from being underground to maintain optimal hygrothermal conditions. There is a need for more research on: • evaluation methods for adjacent elements/buildings providing shading to cellars and their overall influence on energy consumption; • the orientation and shape of above-ground cellars for optimal wine comfort without using air conditioning; • self-shading cellars; • natural ventilation and air-flows around wood casks inside cellars; • evaporative cooling systems since they can also aid in maintaining ideal RH inside cellars and save energy at the same time; • manual irrigation of cellar floors to keep RH at the desired level; • nocturnal convective cooling; • natural ventilation; • radiant cooling; and • earth-air cooling. Applicable to all types of cellar construction More research is needed on the modelling of the combination of passive bioclimatic strategies to achieve wine comfort, thus more attention should be paid to: • meta-design process methodologies for winery design; • retrofit interventions in wineries; • other vernacular cooling technologies and their application to wine cellars; and • winery certifications should be more closely monitored so their ethical challenges improve. Conclusions This document provides a complete review of research papers addressing the climatic aspects of wine cellars for avoiding artificial energy inputs, as a first line of defence against costly energy bills, associated with increased electrical power consumption. The cited papers use a variety of methods, such as simulation and monitoring of cellars. The present review demonstrates how a variety of design factors such as building design and construction impact the overall energy performance of cellars, affecting energy efficiency and consumption of the global winemaking industry. Moreover, this paper explores the role of cellar components, such as ventilation, shape, orientation, building envelope, shading and passive cooling, on maintaining ageing conditions constant while minimising energy expenditure. Underground cellars There is sufficient knowledge to calculate ideal underground cellar depth, so the cellar will not need the application of artificial energy inputs for the ageing and storage of highquality wine. It is possible to reach optimal wine © 2020 Australian Society of Viticulture and Oenology Inc. Acknowledgements This study was funded in part by the Spanish Ministry of Economy and Competitivity (MINECO) under the COWINERGY project (BIA2014-54291-R), the Technical 17550238, 2020, 1, Downloaded from https://onlinelibrary.wiley.com/doi/10.1111/ajgw.12416 by UACH - Universidad Autonoma de Chihuahua, Wiley Online Library on [02/05/2023]. See the Terms and Conditions (https://onlinelibrary.wiley.com/terms-and-conditions) on Wiley Online Library for rules of use; OA articles are governed by the applicable Creative Commons License Arredondo-Ruiz et al. Designs for energy-efficient cellars: a review University of Madrid (UPM), The Autonomous University of Chihuahua (www.uach.mx) and by the Mexican National Council of Science and Technology (CONACYT). Special thanks to José Luis García Fernández, Regina Dupuis, Francisco Orozco González, Mario Ochoa, Mary Mulfinger, Kevin Márquez, Arely Márquez and Garth Murrin. References Ahearn, J.A. (1982) Passive solar handbook. 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