工质对准二级压缩空气源热泵热水器性能影响分析

本文以准二级压缩空气源热泵热水器为研究对象,研究了各种工况下不同工质和补气压比对空气源热泵制热量和COP的影响。结果表明:工质R410A相较于工质R22、R134a的准二级压缩空气源热泵系统,制热效果更好,系统COP更大;当补气压比在0.3~0.5范围内其系统COP最低;在这3种工况下,随着补气压比的升高,系统COP均呈现出先减小后增加的趋势。

Analysis for effects of working substance on quasi-two-stage compression air-source heat pump water heater

This article took the quasi-two-stage compression air-source heat pump water heater as the research object,and studied the effects of different working substances and supplementary pressure ratios on the heat output and COP of the air-source heat pump under various working conditions.The research results showed that the quasi-two-stage compression air-source heat pump system with working substance of R410A had better heating effect and greater system COP than that with R22 or R134a.When the supplementary pressure ratio is within the range of 0.3~0.5,the system COP showed the lowest value.Under all the three kind of working conditions,the system COP firstly increased and then decreased as the supplementary pressure ratio increased.