The Applied Research Of The Solar Power Thermocompression Ventilation Roofing

Southern region in the summer sunshine for a long time, and large solar radiation intensity, usually, the peripheral air syntheses temperature of level roofing reached 60 ~ 80℃, the top-level indoor temperature higher than lower indoor temperature about 2 ~ 4℃. At the same time, top-level indoor thermal environment mostly suffer from interior radiation。In this theses, on the basis of the heat-shielding performance of South traditional clay quadrel brick ventilation roofing is poor, aluminum foil laid to insulate heat and setting up solar power stack to ameliorate the heat-shielding performance of traditional clay quadrel brick ventilation roofing is lodged, and then we lodge a sort of new style energy conservation roofing which day Good insulation and night quick rejection, namely solar power thermocompression ventilation roofing.In conditions of net thermocompression, these theses firstly have a theoretical analysis to the heat-shielding performance of solar power thermocompression ventilation roofing, and then, using the software of FLUENT to simulate, we have compared the amount of ventilation which Flow through the channels of solar power thermocompression ventilation roofing to find out impact laws of the parameters to the amount of ventilation. In addition, we analyze the interstratification's air temperature and velocity field Of the solar power thermocompression ventilation roofing.,and found the result.Finally, the variance law of ventilation and heat insulation effect which in company with the variance in solar radiation intensity, width of exports of chimney, height of chimney through experience, at the same time, we found the variance law of temperature field and velocity field in the passage, The results showed that with the increased intensity of solar radiation, the amount of ventilation of solar power thermocompression ventilation roofing gradually increase; as the width of exports increase, the natural ventilation increase; the amount of ventilation is brought about by the height of chimney increased;Along the short transverse of the duct, the temperature is guadual depress, the temperature and velocity gradient is superduper inside the boundary layer; along the ventilation Channel length direction ,the air temperature near the upper wall of the channel first have a flast increase, and then increase flat; and the air velocity went over approach the passage hub,the value went over large,even building up when came along the course. So the accuracy of simulation is verified. Hourly temperature of inside and outside ostensible of the solar power thermocompression ventilation roofing and the indoor temperature of the corresponding room is measured, the results show that The role of aluminum foil for heat insulation of the solar power thermocompression ventilation roofing is about 40%,and the function for hot pressing ventilation exchange heating is about 60%; the maximum temperature of the internal surface for the solar power thermocompression ventilation roofing is 2.6℃lower then the traditional clay quadrel brick ventilation roofing, the annual mean temperature low 1.6℃too; the internal surface's temperature of the solar power thermocompression ventilation roofing change very gentleness, the annual mean temperature is 27.6℃,and the highest temperature is 28.45℃, the temperature fluctuation is only 0.85℃.