以毛细管为节流装置的CO2 热泵热水器实验研究.pdf

文档介绍：以毛细管为节流装置的 CO2 热泵热水器实验研究
鲍团卫刘业凤蔡操平
(上海理工大学制冷研究所)
摘要: 介绍以毛细管为节流装置跨临界 CO2 热泵热水试验系统。实验研究了不同气冷器进水温度下系统
的 COP 及其变化、气冷器沿管长水温温升梯度变化。分析了不同环境温度下制冷剂充注量对系统高压侧
压力的影响。可以得出:以毛细管做节流装置也可以得到较高的 COP;气冷器水温在高温 CO2 气体进口
段温升幅度最大;系统对环境温度的变化很敏感,环境温度较低时要想得到合适的高压侧压力,制冷剂
的充注量要比环境温度高时多。
关键词: CO2 热泵热水器; 毛细管节流; 试验研究; COP
Experimental study on CO2 heat pump water heater with capillary tube as
throttling device
Bao Tuanwei Liu Yefeng Cai Caoping
(The refrigeration institute of University of Shanghai for Science and Technology)
Abstract : A transcritical CO2 heat pump water heater with capillary tube as throttling device was presented. The changes of COP
in different gas cooler inlet temperate were experimental studied. The water temperature of temperature gradient along the gas
cooler length was also investigated. The effects of refrigerant charge amount to high-pressure side’s pressure in different
environment temperature were introduced. we can conclude: the higher system COP can be obtained with capillary tube as
throttling device; The gas cooler water temperature have maximum temperature rise during inlet area. The system is sensitive to
ambient temperature. In order to get the right high side pressure when the ambient temperature is lower, there needs more
refrigerant than higher ambient temperature.
Keywords :CO2 heat pump water heater;Capillary tube throttling ;Ex