太阳能土壤跨季节蓄热—地源热泵组合理论与实验分析.docx

中文摘要
本文提出将太阳能热利用、跨季节土壤储热与地源热泵相结合的太阳能一热泵组合系统,充分利用太阳能和浅层地表能,扩大太阳能热利用的深度与广度, 提高太阳能利用效率,克服太阳能能量密度低、昼夜及季节性变化,存在间隙性、不可靠性等问题。
太阳能在土壤中储存与土壤的蓄热性能有关,本文探讨土壤蓄热过程中蓄能体内的温度变化,对土壤温度场变化规律,蓄热特性指标:蓄热率、损失率、日蓄热量等以及跨季节蓄热指标等进行理论研究;并运用VB编写可视化计算程序进行模拟分析。针对天津地区太阳能土壤跨季节蓄热的可行性进行分析,为太阳能土壤跨季节蓄热与地源热泵组合系统(SGCHPSS)的推广应用提供理论依据与指导。
在天津地区针对一建筑物建成太阳能土壤跨季节蓄热一地源热泵组合系统
(SGC肿SS)的示范工程与数据采集系统。结合建筑特点与用途设计一套切实可行的蓄热方案,将夏季丰富的太阳能储存在地下±壤中,为冬季当太阳能不足时通过热泵加以提升利用,实现太阳能的转移利用。通过对实验数据的分析处理, 初步得到夏季蓄热时:集热器进、出口温度,日蓄热时间,蓄热功率及系统耗功等;结合示范工程地下温度测量数据,进一步验证理论模拟的可靠性。
关键词:太阳能土壤跨季节蓄热一地源热泵组合系统(SGCHPSS);
太阳能; 地源热泵;土壤蓄热; 跨季节蓄热
ABSTRACT
This paper presents a solar-heat bisystem bines solar energy seasonal storage technology with ground source heat pump energy and shallow ground energy can be utilized fully in this storage makes it possible to use solar energy after sunset or in winter,SO the whole system performance is ,this bisystem Call e the disadvantages of intermittence,unreliability,daily&seasonal variation and low radiation flux of solar energy.
Heat storage of solar energy in soil is concerned closely with heat transfer in soil. The ground temperature field,the thermal storage performance and its representative parameters such as daily heat storage,average heat storage ratio,heat loss ratio,and the inter-seasonal storage performance are puter program WaS developed,and numerical simulations were carried out。The feasibility of bisystem of solar—ground coupled heat pump with seasonal storage in Tianjin
was analyzed to provide theoretical foundation for practical applications.
A demonstration project of SGCI-IPSS was set up and a data acquisition system was on simulation results and weather conditions in Tianjin,the design scheme of thermal storage was presented,which realized energy cascaded utilization inter-season by storing the aboundant solar energy on the underground soil in summer and taking out in operation results of system performa