东北地区太阳能联合地源热泵供暖系统仿真模拟分析

Simulation research on heating system combining solar collector with ground-source heat pump in northeast China area

在现有地源热泵模型的基础上，针对并联和串联2种运行模式，建立了太阳能联合地源热泵供暖系统的动态仿真模型。模拟分析了运行模式、传热介质的分流比例和流量对地埋管换热器和太阳能集热器运行效率的影响。结果显示：在串联运行模式下，地埋管换热器具有更高的运行效率，在并联运行模式下，太阳能集热器具有更高的运行效率；地埋管换热器和太阳能集热器的运行效率随着循环介质流量的增大而提高，但对于整个系统而言，循环介质的流量应控制在0．85～1．00 kg／s 的范围内；并联运行模式下循环介质的分流比例应控制在0．6～0．8的范围内。

On the basis of the existing model on ground-source heat pump （GSHP）system,according to parallel and series operation modes,establishes the dynamic simulation model of the combined heating system.Simulates and analyses the influences of the operation modes,the ratio of the flow rate in underground heat exchanger to the total flow rate in heat pump and the flow rate of heat-carrying fluid on the efficiencies of underground heat exchanger and solar collector.The results show that the underground heat exchanger has higher efficiency in series operation mode,while the solar collector has higher efficiency in parallel operation mode.The efficiencies of underground heat exchanger and solar collector will increase with the increment of heat-carrying fluid flow rate,but the optimal flow rate should be set in the range of 0.85 to 1.00 kg/s.The ratio of the flow rate in underground heat exchanger to the total flow rate in heat pump should be set in the range of 0.6 to 0.8 in parallel operation mode.