中间换热器在家用小型地下水源热泵系统应用分析与探讨

Discussion and analysis on the application of intermediate heat exchanger in small household groundwater source heat pump system

在解决地下水中杂物所引起的水源热泵机组换热器堵塞等问题上,实际工程普遍采用在水源与机组换热器之间加装中间换热器的方法。以南昌某别墅家用小型地下水源热泵系统加装中间换热器为例,以空气源热泵系统与地埋管地源热泵系统为比较对象,对比分析冷热源方案的能效比和经济性,结果表明,地下水源热泵系统在加装中间换热器后,会造成地下水的水温优势无法得到充分利用、能效与经济性均低于空气源热泵系统以及系统控制复杂等一系列问题。

In solving the problem of heat exchanger blockage of water source heat pump unit caused by debris in groundwater,the actual engineering generally adopts the method of adding intermediate heat exchanger between water source and unit heat exchanger.This paper takes a small household groundwater source heat pump system with an intermediate heat exchanger in a villa in Nanchang as an example,and compares this system with air source heat pump system and ground-coupled heat pump system in the aspect of energy efficiency ratio and economy.The results show that after adding the intermediate heat exchanger to the groundwater source heat pump system,the water temperature advantage of the groundwater can't be fully utilized,the energy efficiency and economy are lower than air source heat pump system and the system control is complicated.