Theoretical analysis and experimental research on R1234yf as alternative to R134a in a heat pump system

With the growing awareness of dual threats of GWP (global warming potential) and ODP (ozone depletion potential), the theoretical analysis and experimental testing of R1234yf refrigerant as alternative to R134a in a heat pump were analyzed. The results show that when the discharge pressure decreases from 1.6MPa to 0.9MPa, the heating COPh of R134a and R1234yf heat pumps decreases by 26.97% and 28.78%, respectively. When the evaporation temperature increases from -10°C to 10°C, the heating COPh of R134a and R1234yf heat pumps increases by 12.68% and 20.88%. When the cooling water volume flow increases from 0.14m3/h to 0.35m3/h, the heating COPh of R134a and R1234yf heat pumps increases by 13.07% and 6.56%. When the chilled water volume flow increases from 0.35m3/h to 0.53m3/h, the heating COPh of R134a and R1234yf heat pumps increases by 30.31% and 29.38%. The error of theoretical calculation and experimental testing is between +10% and -15%. This article is protected by copyright. All rights reserved.