The Thermo-regulated Mechanization And Optimization For Envelope Of Solar Buildings

With the continuous growth of the world population and the improvement of people's living standard, the consumption of building energy is increasing. It is an important measure to promote the sustainable development of building by using solar energy to solve the problem of residential building heating in winter. However, due to the large instability of solar radiation,which severely limits the use of solar energy in building heating. Therefore, it is very important to the popularization of solar heating buildings through optimize the thermal performance of building envelope and improve the stability of indoor thermal environment.According to the indoor thermal environment characteristics for the passive solar heating building, combined with the building analytical model and the bilateral thermal disturbance coupling mathematical model. The construction mode and thermal physical parameters of envelopes of solar heating building have been studied systematically, based on the associated research method of field testing, theoretical analysis, experimental verification and numerical simulation analysis. Through systematic research, some main productions are gained:(1) Through field tests for the Ningxia and Lhasa regions, it is found that the local rich solar energy resources are suitable for the development of passive solar houses. But the quality of the indoor thermal environment in winter of existing rural buildings is not ideal. With low indoor temperature and large temperature fluctuations, so that it is necessary to strengthen the heat collection and heat storage design of architectures. At the same time, the operating temperature is proposed as the evaluation index of indoor thermal environment through the analysis of the test results.(2) The calculation of unsteady heat transfer for building envelope under the conditions of indoor and outdoor thermal disturbances, and its boundary conditions, heat transfer characteristics, heat transfer process, composition of bilateral thermal disturbance in the internal surface were systematically analysed and calculated. At the same time, the reliability and accuracy of the mathematical model are verified by the experimental results. Based on the above analysis, the mechanism of heat storage and temperature regulation for the exterior envelope of solar heating buildings is confirmed.(3) The dynamic effect of the building envelope construction mode and thermophysical parameters were analyzed on indoor thermal environment under the conditions of indoor and outdoor thermal disturbances, moreover the minimization of "peak-valley time difference"(time difference between the peak value of the indoor air temperature wave and the valley value of the wall internal surface temperature) and the maximization of "peak- peak time difference"as the optimization principle for the building envelope thermal performance. Finally, the optimized thermophysical parameters and construction mode of the out building envelope were achieved.(4) Based on the systematic analysis of the heat storage and temperature regulation mechanism of the inner envelope structure, and the numerical simulation method is used to optimize the thermal performance of the inner envelope. Finally, the optimized thermophysical parameters and construction mode of the interiort building envelope were achieved.(5) The scientific property of the thermal parameters of the enclosing structure is verified,through establish the building physical model of multi zone building for the overall analysis of thermal storage performance of building envelope.We expect through system analysis and Research on solar heating building envelope thermal performance, explore the mechanism of thermal envelope, residential construction of solar heating building to provide reference and rural areas to improve the living environment and promote sustainable development.