Study On Thermal Responsive Performance Of Residential Buildings With WSAC

For a long time, when calculating building thermal load, building thermal responsive characteristic always is ignored, and outdoor calculating temperature adopted the mean temperature not guaranteeing five days in location, resulting in big error between equipment capacity with real demand. In addition, for free-running building and solar air heating building, building thermal responsive characteristic plays an important role on energy balance and rejecting indoor temperature fluctuation. So, solar air heating building thermal responsive characteristic research is very important.For solar air heating building, its thermal responsive characteristic is effect by internal disturbance, external disturbance, building thermophysical property, and solar air heating system. Firstly, this study experimentally analyzed thermal performance of solar air heating building in winter. It emphasized on analyzing effects of solar air heating system, direct-gain window and movable insulation on thermal responsive characteristic of solar air heating building, getting:compared to continuous heating, under the intermittent heating, the time of the indoor temperature amounting to peak advance 40min, and indoor temperature is fluctuated with heat supply, and the range is±3℃; for the building integrated SAHS, whose area is 9m2, the increase of air flow rate plays a little role on indoor temperature decay within a limit range; The unit area total heat supply adds 1000kJ, and the indoor temperature adds 0.2～0.6℃; enlarging area ratio of window to wall properly under the well insulation can increase indoor temperature; when adopting movable thermal insulation, the indoor temperature can increase about 5℃. And then analyzed weight of influence factors, such as outdoor temperature, wall temperature, and building heat gain, getting predictor formula of dynamic indoor temperature.Secondly, dynamic indoor temperature prediction model suited for solar air building was built. It compiled related simulation procedure, and verified it by experimental result. Based on numerical model, it discussed effects of building thermal capacitance, roof heat storage module, and internal walls on building thermal responsive characteristic, getting that the greater thermal capacitance, the more steady the indoor temperature. When the ambient temperature between-6℃and 0℃, sunshine duration is 10h, and the total solar irradiance is 16300kJ, the unit thermal mass area capacitance adds 100kJ/m2.K, the indoor daily range drops 0.71℃; indoor temperature of the building with heat storage module is higher 1.1-2.5℃than the building without; compared to internal wall, reinforcing the insulation of roof is more effective for increasing indoor temperature. For further improving building thermal comfort, it built PID control program based on presented model by controlling indoor temperature and regulating addition supply heating. At the same time, it selected 12 cities in china, and comparability analyzed regional adaptabilities of solar air heating building, getting this type of building has engineering universality in cities with high solar reliability, such as Lasa, Yinchuan, Beijing, Dalian, Urumqi.Finally, This study also aimed at problems of the building overheating and cooling, and comparatively analyzed two measures reducing overheating (stuffy sun and one-sided cross-ventilation), and five night ventilation measures (natural one-sided ventilation, forced one-sided ventilation, one-sided cross-ventilation, natural two-sided cross-ventilation, forced two-sided cross-ventilation), obtaining one-sided cross ventilation in daytime, one-sided cross ventilation or two-sided natural cross ventilation in nighttime were suitable for solar air heating building.