Field study of seasonal thermal comfort and adaptive behavior for occupants in residential buildings of Xi’an, China

Abstract

The study aims to investigate the thermal comfort requirements in residential buildings and to establish an adaptive thermal comfort model in the cold zone of China. A year-long field study was conducted in residential buildings in Xi’an, China. A total of 2069 valid questionnaires, along with indoor environmental parameters were obtained. The results indicated occupants’ thermal comfort requirements varied with seasons. The neutral temperatures were 17.9, 26.1 (highest), 25.2, and 17.4 °C (lowest), and preferred temperatures were 23.2, 25.6 (highest), 24.8, and 22.4 °C (lowest), respectively for spring, summer, autumn, and winter. The neutral temperature and preferred temperature in autumn are close to the neutral temperature in summer, while the neutral temperature and preferred temperature in spring are close to that in winter. Besides, the 80% and 90% acceptable temperature ranges, adaptive thermal comfort models, and thermal comfort zones for each season were established. Human’s adaptability is related to his/her thermal experience of the current season and the previous season. Therefore, compared with the traditional year-round adaptive thermal comfort model, seasonal models can better reflect seasonal variations of human adaptation. This study provides fundamental knowledge of the thermal comfort demand for people in this region.

Keywords

thermal comfort / seasonal variation / adaptive thermal comfort model / energy saving / residential buildings

References

[1] KwongQ J, AdamN M, SahariB B. Thermal comfort assessment and potential for energy efficiency enhancement in modern tropical buildings: A review [J]. Energy and Buildings, 2014, 68: 547-557

[2] GB/T 50785 — 2012. Evaluation standard for indoor thermal environment in civil buildings [S]. (in Chinese)

[3] ASHRAE Standard 55-2020. Thermal Environmental Conditions for Human Occupancy [S].

[4] CEN Standard EN 15251. Indoor environmental parameters for design and assessment of energy performance of buildings [S].

[5] BoerstraA C, van HoofJ, van WeeleA M. A new hybrid thermal comfort guideline for the Netherlands: Background and development [J]. Architectural Science Review, 2015, 58(1): 24-34

[6] LiB, YaoR, WangQ, et al.. An introduction to the Chinese Evaluation Standard for the indoor thermal environment [J]. Energy and Buildings, 2014, 82: 27-36

[7] HumphreysM. Outdoor temperatures and comfort indoors [J]. Batiment International, Building Research and Practice, 1978, 6(2): 92

[8] NicolJ F, RajaI A, AllaudinA, et al.. Climatic variations in comfortable temperatures: The Pakistan projects [J]. Energy and Buildings, 1999, 303261-279

[9] RichardJ, De Dear, BragerG S. Developing an adaptive model of thermal comfort and preference [J]. ASHRAE Trans, 1998, 104(1): 145-167

[10] MccartneyK J, NicolJ F. Developing an adaptive control algorithm for Europe [J]. Energy and Buildings, 2002, 34(6): 623-635

[11] CaoB, ZhuY, OuyangQ, et al.. Field study of human thermal comfort and thermal adaptability during the summer and winter in Beijing [J]. Energy and Buildings, 2011, 43(5): 1051-1056

[12] YangL, YanH, XuY, et al.. Residential thermal environment in cold climates at high altitudes and building energy use implications [J]. Energy and Buildings, 2013, 62: 139-145

[13] RijalH B, YoshidaH, UmemiyaN. Seasonal and regional differences in neutral temperatures in Nepalese traditional vernacular houses [J]. Building and Environment, 2010, 45(12): 2743-2753

[14] LiB, YuW, LiuM, et al.. Climatic strategies of indoor thermal environment for residential buildings in Yangtze River region, China [J]. Indoor and Built Environment, 2011, 20(1): 101-111

[15] XAVIER A A P, LAMBERTS R. Indices of thermal comfort developed from field survey in Brazil [C]//ASHRAE Winter Meeting. Dallas, United States, 2000.

[16] WangZ, ZhangL, ZhaoJ, et al.. Thermal comfort for naturally ventilated residential buildings in Harbin [J]. Energy and Buildings, 2010, 42(12): 2406-2415

[17] WangZ. A field study of the thermal comfort in residential buildings in Harbin [J]. Building and Environment, 2006, 41(8): 1034-1039

[18] GotoT, MitamuraT, YoshinoH, et al.. Long-term field survey on thermal adaptation in office buildings in Japan [J]. Building and Environment, 2007, 42(12): 3944-3954

[19] ZhangY, WangJ, ChenH, et al.. Thermal comfort in naturally ventilated buildings in hothumid area of China [J]. Building and Environment, 2010, 45(11): 2562-2570

[20] LiuH, WuY, LiB, et al.. Seasonal variation of thermal sensations in residential buildings in the Hot Summer and Cold Winter zone of China [J]. Energy and Buildings, 2017, 140: 9-18

[21] CaoBResearch on the impacts of climate and built environment on Human thermal adaptation [M], 2012, Beijing, Tsinghua University(in Chinese)

[22] KumarS, SinghM K, LoftnessV, et al.. Thermal comfort assessment and characteristics of occupant’s behaviour in naturally ventilated buildings in composite climate of India [J]. Energy for Sustainable Development, 2016, 33: 108-121

[23] IndragantiM. Thermal comfort in naturally ventilated apartments in summer: Findings from a field study in Hyderabad, India [J]. Applied Energy, 2010, 87(3): 866-883

[24] SinghM K, MahapatraS, AtreyaS K. Thermal performance study and evaluation of comfort temperatures in vernacular buildings of North-East India [J]. Building and Environment, 2010, 45(2): 320-329

[25] QuW, YanH, YangL, et al.. Study on climate adaptation model for Human thermal comfort in Xi’an in transition seasons[J]. Building Science, 2014, 30(2): 51-56(in Chinese)

[26] Meteorological Information Center of China, etc.Special meteorological data set for building thermal environment analysis of China [M], 2005, Beijing, China building Industry Press(in Chinese)

[27] ISO 7726-2002Thermal environments specifications relating to appliances and methods for measuring physical characteristics of the environment [S], 2002, Geneva, ISO

[28] de DearR J, MarcE, FountainM. Field experiments on occupant comfort and office thermal environments in a hot-humid climate [J]. ASHRAE Trans, 1991, 100(2): 457-475

[29] DeD R J, BragerG S. Developing an adaptive model of thermal comfort and preference[J]. ASHRAE Transaction, 1998, 104(2): 146-167

[30] MuiK W H, ChanW T D. Adaptive comfort temperature model of air-conditioned building in Hong Kong [J]. Building and Environment, 2003, 38(6): 837-852

[31] GriffthsIThermal comfort studies in buildings with passive solar features, field studies [R], 1990, UK, Report of the Commission of the European CommunityENS35 090

[32] NicolF, HumphreysM. Derivation of the adaptive equations for thermal comfort in free-running buildings in European standard EN15251 [J]. Building and Environment, 2010, 45(1): 11-17

[33] HumphreysM A. Field studies of thermal comfort compared and applied [J]. Applied Ergonomics, 1976, 44(1): 5-27

[34] HeidariS, SharplesS. A comparative analysis of short-term and long-term thermal comfort surveys in Iran [J]. Energy and Buildings, 2002, 34(6): 607-614

[35] YangL, ZhengW, MaoY, et al.. Thermal adaptive models in built environment and its energy implications in Eastern China [J]. Energy Procedia, 2015, 75: 1413-1418

[36] NicolJ F, HumphreysM A. Adaptive thermal comfort and sustainable thermal standards for buildings [J]. Energy and Buildings, 2002, 34(6): 563-572

[37] de DearR J, BragerG S. Thermal comfort in naturally ventilated buildings: Revisions to ASHRAE Standard 55 [J]. Energy and Buildings, 2002, 34(6): 549-561

[38] ZhangB. The duration of four seasons in China [J]. Journal of Geographical, 1934, 1(1): 1-48(in Chinese)

[39] CenaK, DeD R. Thermal comfort and behavioural strategies in office buildings located in a hot-arid climate [J]. Journal of Thermal Biology, 2001, 26(4–5): 409-414

[40] de CarvalhoP M, Da SilvaM G, RamosJ E. Influence of weather and indoor climate on clothing of occupants in naturally ventilated school buildings [J]. Building and Environment, 2013, 59: 38-46

[41] LiuW, HaoH, XiongJ, et al.. Feedback effect of human physical and psychological adaption on time period of thermal adaption in naturally ventilated building [J]. Building and Environment, 2014, 76: 1-9

[42] EnescuD. A review of thermal comfort models and indicators for indoor environments [J]. Renewable and Sustainable Energy Reviews, 2017, 79: 1353-1379

[43] UmemiyaN. Seasonal variations of physiological characteristics and thermal sensation under identical thermal conditions [J]. Journal of Physiological Anthropology, 2006, 25(1): 29-39

[44] MäkinenT M, PääkkönenT, PalinkasL A, et al.. Seasonal changes in thermal responses of urban residents to cold exposure [J]. Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 2004, 139(2): 229-238