As a building integrated solar thermal system,the dual-function solar collector integrated with building works for passive space heating in cold winter season,and for water heating in warm seasons.In this paper,the study is made on the dual-function solar collector integrated with building when it works in water heating mode with natural circulation.The coupled model of the collector and building's environment is established and validated.A numerical simulation is achieved to show the thermal effect of the novel system on the building in summer.By comparing with the cooling loads of the rooms with or without the novel collector in summer,the results show that when in summer,the novel solar system is available for serving hot water,and it does not have the summer overheating problem,and can even improve the thermal environment of its building slightly.
JI Jie LUO ChengLong SUN Wei HE Wei JIANG QingYang
本文以壁挂式太阳能空气集热器(Wall-mounted Solar Air Collector,WSAC)为研究对象,采用现场实测和理论分析的方法,通过研究太阳辐射照度、送风量与WSAC瞬时效率以及纯效率的关联性,提出了综合考虑建筑能耗时变风量工况下提高WSAC运行效率的途径。而后,利用实体大实验房,分别采用连续定风量送风、变风量送风以及间歇定风量送风的运行方式,对WSAC热性能及节能效果进行了实验研究。结果表明,在考虑WSAC纯效率的情况下,变风量送风的运行效率优于其它送风方式,相对连续定风量送风节能63%,同时还得到了随着太阳辐射照度变化的最佳控制运行模式。
