摘要
本文针对R744热泵热水器系统,考虑系统部件结构参数,建立了系统仿真模型。利用该模型分析了加入少量R290对R744热泵热水器系统性能变化的影响,发现当加入3%的R290时,相比纯R744装置,系统性能最优,其系统制热系数略有增加,最优放热侧压力稍有降低,并预测分析了该配比下,热汇水出水温度为45℃、50℃、55℃、60℃、65℃时系统主要循环性能。结果表明,在纯质R744中加入少量R290组成混合工质既可以提高系统循环性能,又能降低系统放热侧压力。
Based on the heat pump water heater system using R744 as a refrigerant,and with a consideration of the structural parameters of system components,a simulation model was established in this paper.Impact of changes in performance when a small amount of R290 is added into the system is analyzed by using the model.Compared with the pure R744 equipment,the system performance is optimal when adding 3％ of R290,which the system heating COP （Coefficient Of Performance） increases slightly while the optimum heat rejection pressure reduces a little.The system performance is predicted for optimum mass fraction when the heat sink water temperature are set to 45,50,55,60 and 65℃.The results show that when adding a small amount of second component R290 into pure R744 to consist mixed refrigerants suitably,the system performance is improved while the system optimum heat rejection pressure is reduced.
出处
《节能技术》
CAS
2014年第5期434-438,共5页
Energy Conservation Technology
基金
国家自然科学基金资助项目(51176207)
郑州市科技领军人才支持项目(131PLJR(64))
