Construction and Performance Study of Small CO2 Heat Pump System
Natural refrigerant CO2 has become one of the most potential substitutes in the heat pump system,because it has excellent thermal property and environment friendly features.In order to make CO2 as a new refrigerant more practical,the scheme of trans-critical CO2 cycle heat pump system and operating condition was determined to select and calculate the gas cooler,evaporator and other parts,a trans-critical CO2 heat pump system was eventually built using CO2 as refrigerant,which had a heat regenerator.This heat pump was compact and had a low manufacturing and operating cost.In the meantime,a preliminary study about the effect of cooling water and chilled water with the machine was conducted,it showed that increasing the flow rate of chilled water had little effect on the output-water temperature of heat pump;Increasing the flow rate of the cooling water could effectively improve the EEER,and the hot water could be produced at high temperature more easily,while the flow resistance would increase.
CO2 heat pump systemrefrigerantheat regeneratorcooling water flow ratechilled water flow rate
国家科技期刊平台
NSTL
万方数据
维普
