两种工况下R417a和R22用于空气源热泵热水器的实验研究

Experimental Research of R417a and R22 Used in Air-source Heat Pump Water Heater

分别在20℃和7℃工况下对R417a用于空气源热泵热水器进行了实验,并就进水温度对系统吸/排气压力、消耗功率、制热功率、COP等方面与R22进行了对比分析。结果表明,两种工况下,混合工质R417a用于热泵热水器时与R22相比,它的吸/排气压力均是低的;输入功率、制热量要小于R22系统;性能系数优于R22系统,且随着进水温度的升高,其下降趋势比R22迅速。

Experiment was carried out on the R417a and R22 used in air-source heat pump water heater under 2 different working conditions of 20 ℃ and 7 ℃.The discharge pressure,power in-put and coefficient of performance （COP）of the R417a were analyzed in comparison with R22. Results show that under the two working conditions,the discharge pressure,power input and power output of R417a system are lower than those of R22,and its heating output is reliable as a result of the effect by the temperature of hot water.Though the COP of R417a reduces rapidly, its average COP is higher than that of R22.