Indoor thermal environment and energy saving for urban residential buildings in China |
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| Affiliation: | 1. Thermal Engineering for the Built Environment Laboratory (TEBEL), School of Architecture, Civil and Environmental Engineering (ENAC), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland;2. International Centre for Indoor Environment and Energy (ICIEE), Department of Civil Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark;3. Indoor Environment Center, Department of Architectural Engineering, Pennsylvania State University, University Park, USA;1. Department of Architecture, School of Design, Shanghai Jiao Tong University, China;2. China-UK Low Carbon College, Shanghai Jiao Tong University, China;3. Yangtze Delta Region Institute of Tsinghua University, China;4. Longjiang Jing Xi Machinery Manufacturing Co., Ltd, China;5. School of Architecture, Harbin Institute of Technology, China;6. Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology, Ministry of Industry and Information Technology, China |
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| Abstract: | The purpose of this survey is to investigate the actual conditions of the residential indoor thermal environment in urban areas in China for evaluating thermal comfort and predicting the energy conservation feasibility for space heating and cooling.The apartment homes under investigation were located in the urban areas of nine major cities. The questionnaire survey revealed building characteristics, the types of space heating and cooling system in use, aspects of life style, during winter and summer seasons, and so on. The measurement showed that winter indoor temperatures in Harbin, Urumqi, Beijing and Xi’an remain at a relatively stable level near 20 °C due to the central heating system installed. However in the other cities lacking central heating systems, indoor temperatures fluctuated as a function of the change of outdoor temperature. On the other hand, summer indoor evening temperatures in Shanghai, Changsha, Chongqing and Hong Kong were higher than the comfort zone of ASHRAE. Therefore it is expected that energy use for space heating and cooling in the southern China will increase in the near future because of occupants’ requirement for comfortable indoor environment. Based on the results yielded by this study, in Beijing the calculation of space heating and cooling loads indicated that the energy used to heat indoor spaces can be halved by installing thermal insulation and properly sealing the building. |
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