| The hot air solar collector is used for lots of solar architecture, because of the unique advantages for mass transfer, anti-freeze and equipment maintenance in the cold regions of northern China. However, due to the instability intermittent and the small air heat capacity of solar energy and other factors, it doesn’t match the energy supply and demand contradiction for the solar air heating system. Then it’s impediment to its popularization application of solar building seriously. To this end, the research of match the building and its regenerative heat storage performance for air.solar heating system, will provides a scientific basis of demand and supply for the effective mitigation of time, intensity and spatial mismatch contradiction for solar thermal energy. It will be a very important theoretical significance and practical value.In this study, basis of previous studies, we proposed a hot air solar concrete floor heat storage system for air solar heating. The air solar collectors provide heat for the hot air, concrete floor as a heat storage components, and the hot air is driven by fan circulates in the system. We have been a measured studied of the thermal storage system for experimental room built in rural areas in Dalian, and then it’s taken to verify the effectiveness and feasibility of thermal storage system. By analyzing the thermal response of thermal storage system working in the different heat collect, hot air humidity and wind speed or other critical factors. Then we will master the heat-moisture transfer characteristics and reservoir/heat release of the heat storage floor systems under solar air heating system.Secondly, we developed the mathematical models for predicting the properties of concrete floor, used the energy conservation mass combined finite difference method. Then we prepared a program to calculation the heat balance equation. The accuracy of mathematical model is verified for comparison the calculation data and measured data.Finally, using the proven mathematical model to simulated and analyzed the heat property of hot solar thermal heat storage floor systems. The results shows that the collector area should be a appropriate choice to match the system of heat storage for thermal solar building design phase. When the different typical month outdoor ambient temperature is used to research, the difference value between indoor and outdoor temperature reached highest15.5℃, so the regenerative effect is most evident. When the air velocity changed with heat supply of heat collector synchronization linear change, the heat storage effect is better. When the climate adaptation of solar thermal storage is analyses by hierarchical, solar radiation intensity and the heat transfer and storage thermal performance of local building envelope will be the main criteria to determine the adaption of thermal storage. |
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