蓄热型太阳能-空气源热泵仿真及试验研究

Simulation and Experimental Study of Solar-Air Source Heat Pump with Heat Storage

从蓄热型太阳能-空气源热泵联合热水系统的工作特点出发,基于Trnsys软件,建立了太阳能-空气源热泵热水系统的仿真模型,分析了上海地区整年各月系统的太阳能保证率、太阳能与热泵的供热量比值,为长三角地区太阳能-空气源热泵系统的应用提供了数据参考。分别对热泵单独运行、蓄热水箱单独运行模式、太阳能集热器和蓄热水箱联合运行三种运行模式进行实验研究。仿真结果表明:采用太阳能作为辅助热源在全年供热量能够占整个系统总供热量42%左右,降低了系统运行费用。试验结果表明:(1)太阳辐射强度决定集热器的进出口温差,相变蓄热水箱可以在一定程度上降低集热器进口水温,提高集热器的集热效率;(2)有相变蓄热材料的水箱能够延长热水使用时间。

The thermal storage solar-air source heat pump water heater is introduced,based on the working characteristics. A simulation model of solar-air source heat pump water heater is established with Trnsys. Monthly solar fraction and heat radio from solar or air source heat pump in Shanghai are analyzed,providing data reference for the application of solar - air source heat pump water heater for Yangtze river delta area. Three operation modes of heat pump,heat storage tank,solar collector and heat storage tank are studied experimentally. Simulation results show that: solar energy as auxiliary heat source can account for about 42%of the total heat supply of the whole system in the whole year,which reduces energy consumption of the system. The experimental results show that:( 1) The solar radiation intensity determines the import and export temperature of the solar collector. The heat storage tank can reduce the inlet water temperature in some degree and improve the thermal efficiency of solar collector;( 2) Water tank with phase-change materials can extend the service time of hot water.