The Study On Thermal Performance Of Trombe Wall With Shading Device In The Air-gap

The relative high architecture energy consumption and environment pollution caused by the society development and the use of energy are becoming main factors which really counteract the sustainable development of the economy and the society in China. And the architecture energy consumption will be raised from 27% to 35% of the whole society energy consumption until 2020. Solar energy is the cleanest, simplest and cheapest available energy for the architecture. It could help to maximally decrease the architecture energy consumption by proper designing with the application of solar technology. And the passive solar technology is competent with ordinary fuel heating and has brilliant prospect due to its simple structure, good economy and energy saving performance.There are three basic passive solar elements, the sunspace, the direct gain and the Trombe wall. Trombe wall has been invited forty years ago, and lots of researchers involved in studying its diurnal thermal performance in winter. Their terminal object was to improve Trombe wall's thermal performance and popularization by meliorating its structures and materials. But there are little studies about Trombe wall's overheating in summer and overcooling in winter night. In order to popularize the application of Trombe wall, especially use it in the city residential buildings, it must solve the two "over-" problems.This paper discusses the advanced Trombe wall's thermal performance, which installed a shading device in the air gap, by the theory and experiment detail analysis. The thermal performance was investigated with regard to the simultaneous temperatures, heat gain and their acquisition of the Trombe wall. By analyzing experimental data, an investigation was carried out on the heat preservation effect at a winter night and its cooling performance in summer. The suitable material and theoretical optimum fixed location of the shading in the air gap for minimizing the heat loss was also discussed by the heat transfer theory. Based on the experimental study, it also designed a wonderful semiautomatic shading device for Trombe wall. Finally, the steady state Trombe wall calculation model has been modified and produced result compared satisfactorily with the experiment. It also discussed the relationship between the wall height's and Trombe wall's thermal performance in winter by simulation.