住区微气候环境中热物理问题

This research focus on the three relations (1) relations between building thermal environment.characters and occupants health & comfort response; (2) how the building plan & construction effects the building indoor & outdoor micro-climate and (3)the relation between urban thermal island and urban construction development. This is the fundamental study for building and urban construction sustainable development..Medicinal inspection and physiological test has been carried out on about 2600 test objects of which part of them stay in air-conditioned space for most of the time while others stay in.no-air-conditioned space. The result shows that there are clear differences in objects’ physiological responses between the two groups. Air-conditioned environment may reduce the human.adaptability to the changing of thermal environment.Basing large scale measurement on the dynamic structure of air movement, it is discovered.that the air movement caused by natural ventilation performs quit different behaviors from the air movement caused by mechanic ventilation. This result gives good explanation on the difference of draught effects to natural ventilation and mechanical ventilation. Four indicators have been.developed to distinguish natural ventilation and mechanical one according to measured air movement data.Investigation has been carried out on thermal performance of more than 200 residential apartments in Beijing, few traditional houses in AnHui, and a village in ZhangJiaGang during summer time. The differences in thermal performance within these measured buildings and between traditional buildings and new type of buildings have been studied. Data on residential indoor causal gains, occupant behaviors in operating their flat have also collected which are the.fundament data for thermal modeling of residential buildings.Simulation model have been developed for indoor thermal climate, outdoor air movement,.outdoor long wave and short wave radiation, and the thermal effect of vegetation on building surface as well as on the ground. Large scale field tests have been carried on to understand these physical processes and to validate these models. Several real projects have been simulated to.predict the thermal environment performance indoor and outdoor by these models. Optimizations have also made to find better planning and designs for these projects.Urban thermal island effects are measured in KunMing. Gradient of temperature, humidity.and air velocity within 100 meters from the ground surface have been measured at different points over the whole city. How the urban thermal island level increased with urban construction.development during the last 20 years has been studied. Some new phenomena have been discovered from the measurement. For instance, air temperature different between the air above the city and the air above suburb varies day and night. There is stronger urban thermal island effect during the night than the day. The results from this project provides fundamental data and knowledge on what kind of.indoor thermal environment we should going to build; how to build that efficiently and save energy; what measures we should take to obtain a better outdoor environment in a building area.These will be some contributions for Chinese sustainable housing development

利用流行病学方法调查稳态热环境和瞬时热冲击对人体健康的影响和致病机理，确定健康及可接受热环境的动态特性。寻找热环境动态特征非线性的描述方法，建立该特征与建筑形式及周边环境因素间的数学模型。由此可发展出一套主动形成动态热环境的新居室环境调节方式。这将突破传统的热环境调节技术，具有节能、改善居室环境、健康舒适的显著效益。