太阳能辅助地源热泵系统运行策略研究

Research on operation strategy of solar assisted ground source heat pump system

文章根据气象条件和建筑负荷的不同,把太阳能辅助地源热泵(SAGSHP)系统运行时段分为多个运行期间,在各运行期间设置不同的集热、储热和热泵供热的运行参数,研究各运行参数的设定对SAGSHP系统性能的影响规律,进而确定了各运行期间的优选参数。SAGSHP系统的性能参数包括热泵机组COP、直供热量占比、SAGSHP系统总耗电量和SAGSHP系统COP等。研究结果表明,相比于不分期间的控制策略,分期间控制策略的年集热量相对提高了4.0%,储热量相对提高了7.1%,太阳能直供热量相对提高了15.5%,SAGSHP系统COP相对提高了3.9%。

In this paper, the operating time of the solar assisted ground source heat pump system（SAGSHP system） is divided into multiple operating periods based on the difference of the meteorological conditions and heating load. The influence of operating parameters on system performance is studied with setting different operating parameters of heat collection, heat storage and heating mode of heat pump during various operating periods. And then, the optimal operating parameters of each operating period are determined. The parameters of the system performance include COP of heat pump unit, direct heat supply proportion, total power consumption of SAGSHP system, COP of SAGSHP system and so on. The simulating results of the system show that the annual heat collection of the operating strategy mode of divided period is increased by 4.0% compared to that of the normal operating mode of non-divided period. Similarly, the heat storage is increased by 7.1%,the solar direct heat supply is increased by 15.5%, and the COP of SAGSHP system is increased by3.9%.