The Thermal Performance Of Passive Solar House With Thermal Mass

The shortage of energy, its low efficiency and the relating environment problem is impeding the development of our society. Exploiting and mutilating renewable energy has become an important stratagem for the sustainable development. Developing low energy buildings and zero energy buildings is a hard task for the country.Using solar energy to meet the living requirement of the dwellers, solar houses release the pressure of energy circus a lot. Many of the passive solar houses are used for school buildings and country homes. Yet the passive solar houses have something to overcome before they could be utilized for most people. One of the most important one is its comfortlessness brought by the large temperature range during a day and the unsymmetrical radiation temperature difference.The paper analyzed the thermal performance of passive solar houses with different thermal mass level though the theoretical and experimental way. The result could be used as a reference to the design of passive solar homes. It is meaningful for developing and spreading the utilization of solar homes.Firstly, the paper studied the thermal performance of passive solar houses with light thermal mass through the calculation and experiments. The conclusion is: the passive solar house with high thermal mass can increase the indoor are temperature by 2～5℃; Comparing to other factors, the solar radiation is the most important one, but when it increases intensively, the force only by stack is not powerful enough to drive the circulation. The range of passive solar house with light thermal mass is obviously distinct.Secondly, the author studied the thermal performance of passive solar house with high thermal mass in allusion to the problems of the ones with light thermal mass. The experiment al results showed that the houses with high thermal mass can reduce the temperature by 1～5℃ in summer. Meanwhile, the calculating results indicate that the maximal time lag of the indoor temperature is 6 hours, and when the time constant exceeds 20, it will remain steadily. This indicates that the thermal mass in the houses should be properly displaced in order to obtain a more ideal thermal condition.