Yu Qiu’s research while affiliated with Wuhan Institute of Technology and other places

The concept and the application of green material start from the modern times. In recent years, with deepening of environmental pollution, peoples health and the ecological balance got impacted; therefore, environmental protection gained peoples attention. Having realized the significance of architecture materials to environmental protection, people are more paying attention to the environmental protection effects in choosing and producing architecture materials. Then, the concept of green materials emerged and the green architecture materials began to be applied by architectures broadly. The application of green materials proved to be remarkable feature of modern architecture.

Direct evaporative cooling has long been demonstrated as an energy efficient ,cost effective and no CFCs emission means for space cooling in hot dry regions .With the aggravating of the global climate warming and energy crisis, using passive cooling technique will be a good solution . In this paper, the theory of passive downdraught evaporative cooling techniques is analyzed. It is an environmental friendly technique in that it can provide more fresh air than the conventional air-conditionings, and also low cost on operation and no CFCs emission compared with conventional air-conditionings. In this paper, some cases will be introduced .The successful PDEC cases in hot dry areas show weather condition is the key factor for the feasibility using PDEC technique. From the analysis on the weather data in Turpan, which presents a typical climatic character in North-west China , predicts a great feasibility of using PDEC technique in public architectures.

With the increasing number of compound or deep-plan buildings, application and research on passive ventilation cooling system in construction is developing from single and directed way to multiple and indirect ways ,from not easy to control to easy to control, from simplicity to systematization. This paper summarizes four kinds of passive ventilation cooling types. Their techniques and adaptability are discussed .The disadvantage of natural ventilation cooling is pointed out. It proposed that indirect controllable ventilation cooling may be used in large depth, enclosed public buildings.