低温空气源CO_2热泵热水器系统特性研究  

Simulation Study on the Performance of Cryogenic Air-source CO_2 Heat Pump Water Heater System

作　　者：张超[1] 吕新刚 胡冬阳 朱昱衡 唐晓龙 ZHANG Chao;LU Xin-gang;HU Dong-yang;ZHU Yu-heng;TANG Xiao-long(Zhongyuan University of Technology,Zhengzhou 450007,China)

机构地区：[1]中原工学院,河南郑州450007

出　　处：《流体机械》2017年第11期66-71,共6页Fluid Machinery

摘　　要：压缩机排气温度过高及制热量不足等现象是单级蒸汽压缩式制冷系统在低蒸发温度下经常面临的问题,以CO_2为制冷工质的中间不完全冷却两级蒸汽压缩热泵系统能很好地改善这些问题。本文构建了低环温(-20℃)下CO_2热泵热水器系统、确定了系统各部件结构参数、建立了部件和热泵系统的数学模型。模拟结果表明:随着环境温度升高,CO_2热泵热水器系统制热量以及COP呈现出增长的趋势,改变水侧输入参数对系统性能有较大影响。For the phenomenon that heating capacity of ordinary single-stage compression refrigeration cycle in the low evaporating temperature is insufficient and the discharge temperature of compressor is too high,establish CO2two-stage compression intermediate incomplete cooling heat pump cycle.Establish the CO2heat pump water heater system in the low temperature(-20℃),determine the structure parameters of the system components,and establish the mathematical model of the system components and the heat pump system.The simulation results show that:with the increase of the ambient temperature,the heating capacity and the COP of the CO2heat pump water heater system increase,and the change of the water side input parameters has great influence on the performance of the system.

关 键 词：单级压缩制冷循环 CO2双级压缩中间不完全冷却热泵循环 CO2热泵热水器 数值模拟 

分 类 号：TH12[机械工程—机械设计及理论]