18 May 2017
A tested loop for high temperature heat pump (HTHP) system with a constant speed scroll compressor using
HFC245fa as its refrigerant was designed and built. Theoretical analysis and experiment were carried out under
the working condition of condensation temperature from 70? to 120?, temperature rise from 30? to 50?.
The theoretical and experimental results both show that heating capacity and coefficient of performance (COP)
of the HTHP increase with condensation temperature increasing at fixed temperature rise, and the discharge
superheating reduces with condensation temperature increasing at fixed suction superheating and temperature
rise. The experimental results show that the outlet temperature of the pressurized water can be heated up to 114?, COP can be as high as 5.18, when condensation temperature and temperature rise are 120? and 49?,