Haikou is located in tropic climates in China. The outdoor environment in summer is too harsh to stay here. However, the traditional architecture, namely arcade, still survives in the severe climate. Its indoor and outdoor parameters of arcade are tested in field to research its thermal environments. The heat stress index is used to study the adaptability mechanism of arcade and local human to hot and humid environment. It proves that the metabolic rate and wind velocity are main and adjustable factors to reduce heat stress in such wretched weather. On the condition of metabolic rate below 60met and wind speed above 0.7m/s, the healthy adult can work normally in the arcade or on the corridor. So the human in tropic area should keep their metabolic rate and period staying out in the summer daytime as less as possible, and the architects should make full use of the local wind speed to organize natural ventilation.

The aim of this paper is to analyze whether the intermittent heating mode is feasible for residential buildings in Lhasa, the thermal parameters of each palisade structure and the influence law of intermittent heating mode on the indoor thermal environment. In this paper, the DeST energy consumption simulation software that is compiled by Tsinghua University was used to simulate and analyze a residential building in Lhasa city. The results show that: It is completely feasible to carry out intermittent heating in Lhasa area. Considering the indoor temperature reduction should not be too large during intermittent heating break, it is recommended to adopt external insulation. Compared with continuous heating mode, heating open 8 hours and 12 hours a day can save energy 24% and 39% respectively. The results can provide evidences for intermittent heating operating control and energy- saving.

Before the construction of hydraulic structure, aggregate must be cooled or heated by air (we call it aggregate air cooling or heating in this paper) or other technologies to the required temperature. Previous model of aggregate air cooling or heating cannot provide the center temperature of each aggregate. So a more accurate mathematical model is developed to determine the thermal performance of aggregate, and the surface heat transfer coefficient of wet aggregate is revised. This model can predict the center temperature of an aggregate and can accurately calculate the cold down time or temperature distribution of aggregate, so that the refrigeration or heating capacity can be reasonably supplied. It’s significant for foundation engineering of hydraulic structure.

In order to master the indoor thermal environment of the traditional dwelling houses in dry hot and dry cold climate zones in winter, the east Gansu province is taken for example to study. Indoor and outdoor air temperature, relative humidity, solar radiation intensity and wind speed were obtained by using field-tested methods for the traditional dwelling houses in this region in winter, and the clothing form and activity of people were surveyed by way of questionnaire. And then, the influence of house orientation, indoor heat sources and insulation on the indoor thermal environment is analyzed, the WCI (wind chill index) is used to evaluate the indoor and outdoor thermal environment at last. The results show that: the indoor temperature can raise about 8.3 °C when the house orientation is better and Chinese kang as the heating heat source. The good practice on local structure is worthy of following for other houses, such as adobe posted solid brick wall, double windows, wooden sash windows and so on. However, people still feel very cool or cold about the indoor temperature for much of the day, and even people feel very cold for 5% of the day. At the end of thesis, some methods about the indoor thermal environment improvement are proposed.

Based on the statistical method of the heating outdoor design temperature in HVAC design code, we use two calculation methods to analyze the outdoor design temperature and the heating load of some typical cities for intermittent heating . The results show that: the heating outdoor design temperature is higher 3.8 °C and 4.6 °C than that of the current standard value for long-term and short-term intermittent heating respectively, accordingly, the heating load of the long-term and short-term intermittent heating can be reduced by 9% and 15% according to the new outdoor design temperature calculated by this paper.