TY - JOUR
TI - Experimental study on R1234yf heat pump at low ambient temperature and comparison with other refrigerants
AU - Xu Shuxue
AU - Niu Jianhui
AU - Ma Guoyuan
JN - Thermal Science
PY - 2019
VL - 23
IS - 6
SP - 3877
EP - 3886
PT - Article
AB - In this paper, an integrated vapor injection compression heat pump system  using R1234yf and R32, R410A, R22and R134a as working fluids was developed,  and their heating performances under low ambient temperature were  quantitatively evaluated. An experimental bench was built to test the  system’s working performance. The condensing temperature, evaporating  temperature, power input, and other variables were analyzed to evaluate the  system’s heating capability and energy efficiency. Test results showed that  the R1234yf system can run at the evaporating temperature of -20°C, but its  heating Coefficient of Performance (COP) was 5% lower than R134a; The  R1234yf vapor injection system provided very significant performance  improvements for heating performance compared with no vapor injection: the  heating capacity and heating COP can be improved by 14.3% and 11.7%,  respectively.