Performance Test of Static Heating Type Heat Pump Water Heater for Refrigerant R417a Replace R22

This article researched on both theoretical analysis and experimental study of static heating heat pump water heater's performance.We set up experiment platform in air enthalpy room according to the national standard GB / T23137-200 in provisions of working conditions,then tested on the unit performance by using the environmental simulation equipment.This experiment measured the temperature of the water box by using the tank hybrid method.First,the research focus on the unit performance in different conditions of refrigerant injection volume;second,the unit operating conditions were divided into 4 different condition:high temperature,standard,low temperature,frosting,then we carried out a detailed analysis on the unit performance according to the experimental results,finally,we alternative comparative experiments using refrigerant R417a and R22.