太阳能空调蓄热水箱特性研究

根据南京地区的太阳辐射强度及典型建筑负荷的日变化规律,得出单位集热面积时可满足的负荷建筑面积及蓄热水箱温度变化规律;并对几种不同体积蓄热水箱进行了分季节的启动时间分析。结果表明,蓄热水箱体积影响着户式太阳能空调系统性能:夏季,在单位集热面积的情况下,水箱体积以70L为基准,体积增大114%,热水工作范围减小54%,可承担负荷减小25.2%,同时,体积增大到150L后启动时间也变为原来的2倍以上,可见,蓄热水箱体积越小越好,但它存在一个最小值随着日工作时间的延长而增大;冬季蓄热水箱体积对负荷的影响较小,但即使70L的水箱,冬季启动耗时也比夏季多4h。

Study on the Property of the Heat Storage Tank for Solar Air Conditioning

The changing regularity of temperature in hot water tank and load of building reached under the unit area of collector was obtained according to the undulations of solar radiation intensity and load of typical buildings in Nanjing area,and the time for tank with different volumes to start-up was analyzed in summer and winter.The results show that the performance of the household air conditioning system is impacted by the volume of the tank : in summer,under the unit area of collector and the tank of 70L,with the volume increased by 114%,the range of the tempertature of hot water decreased by 54% and the building area of the load decreased by 25.2%,at the same time,with the volume increased to 150L,the time for start-up is twice longer than before,that said,it was better,the tank smaller,but the minimum volume is existed,which with the extending of working time bigger and bigger;in winter,the effect of the tank volume on the load is small,but the time for start-up is 4 hours longer in summer than in winter,with the tank of 70L.