Study On The Energy Saving For Heating Of Rural Houses In Peking And The Theoretical Analysis On Heat Transfer Of Solar-Thermal Storage Floor

With the development of the economy,energy consumption in building is becoming more and more important in nowadays,and it has heen an important measure to cut down energy consumption.With continuous enhancement of People's living standard in countryside area, The countryside energy consumption gradually enhances, Particularly, coal consumption for heating is increasing in northern countryside area year by year, so it has been a important issue to reduce the energy consumption of heating in northern countryside area.In the foundation of the village energy investigation ,we select the rural typical house of Peking as the research object in this article.we tested the K of ceiling, exterior wall and ventilation volume of the rural typical house; we simulated the energy consumption of heating of the rural typical house with DeST-h;we made single factor analysis about the influence of ceiling, exterior wall and ventilation volume to the building heat load;we determined the efficient thickness of polystyrene board used for ceiling and exterior wall as insulation of outer heat is 6cm by economic calculation;at the time, we determined the south window-wall ratio of single-glazed hung window of wooden framed,single-glazed side sliding window of aluminium alloy sheet and double-glazed hung window of wooden framed with the software.According to the analysis of each influence factor , we pointed out the comprehensive reformation measure of the rural house of Peking, and computed potential of energy saving for heating of the reformed house is 79.6%.In this article, we established the solar—thermal storage floor heat transfer model,and solved the model, The computation indicated that,The thickness of solar—thermal storage floor is not big to the undersurface temperature influence;The thickness of solar—thermal storage floor is more big, the surface temperature to delay more big,the Temperature fluctuation oscillation is more small. When thickness of solar—thermal storage floor is 0.3m,temperature oscillation amplitude on the surface already only is 1℃; When thickness of solar—thermal storage floor is bigger than 0.3m, temperature on the surface is a approximate constant; With ratio of solar energy collection area to the floor area gradual increment from 1/8-1/3,the heat flow on undersurface and surface gradually increase. With ratio of solar energy collection area to the floor area gradual increment from 1/8-1/3, the mean heat flux density on the surface increases from 15w/m~2 to 40 w/m~2;The max heat flux density of undersurface increases from 57 w/m~2to 150 w/m~2. we produced method to compute the thickness of solar—thermal storage floor and the solar energy collection area.