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建立耦合双级热泵制热系统,即设定空气源热泵作为一级预热机组,水源热泵机组作为二级制热机组,从而实现双级耦合制热。实验对空气源热泵在各种实际工况下运行的COP值进行测量与分析,当环境温度在-5℃时,若循环制热温度20℃左右,其COP值仍能够达到4;水-风式水源热泵机组在15～20℃水源循环进水温度时,能耗比(COP)值平均超过4;同时,实验还在对建型的耦合双级热泵装置进行实际测量的基础上,得出客观结论,即使在寒冷的气候条件下,双级热泵仍能够保持较高的节能效果和使用效果。
The establishment of coupled two-stage heat pump heating system, which set the air-source heat pump as a preheater unit, water source heat pump unit as a two-stage heating unit, so as to achieve two-stage coupling heating. The COP of the air source heat pump operating under various practical conditions was measured and analyzed experimentally. When the ambient temperature is -5 ° C, the COP value can still reach 4 if the circulating heating temperature is about 20 ° C. Water-wind Type water source heat pump unit at 15 ~ 20 ℃ water inlet water temperature, the average energy consumption (COP) value of more than 4; the same time, the experiment is still based on the actual measurement of the coupled two-stage heat pump device built on the basis of Objectively speaking, even in cold climates, the two-stage heat pump can still maintain high energy-saving effect and effect.