Experimental study on CO2/R32 blends in a water-to-water heat pump system

Zhili Sun,Qi Cui,Qifan Wang,Jinghong Ning,Jianghe Guo,Baomin Dai,Yongqiang Liu,Yibo Xu

Applied Thermal Engineering（2019）

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摘要

•The experiment of CO2/R32 blends in a water-to-water heat pump system is conducted.•23.3% and 65.2% maximum efficiency improvement in heating and cooling are obtained.•The optimal mixing ratio of CO2/R32 (0.6/0.4) is found.•System pressure, cooling capacity, and heating capacity are reduced.•The internal heat exchanger further improves the system performance.

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关键词

Water-to-water heat pump system,CO2/R32 blends,Thermal matching,Internal heat exchanger

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