Notice of RetractionPerformance Analysis of R134a and R417a Applied to Air Source Heat Pump Water Heaters

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

Carry on the theoretical calculations and experimental analysis of R22, R417and R134a applied to air source heat pump water heaters. Kept 5 degrees superheat at the outlet of evaporator, tested the heating capacity, power, COP, hot water production, the exhaust temperature and pressure of the compressor under different season conditions and 55??C and 60??C outlet water temperature of the tube heat exchanger. The results show that the heating capacity and COP of R417A used in the air source heat pump water heaters are closer to R22 and the discharge temperature is 25 degrees lower than that of R22, the discharge pressure is also 0.17 MPa lower than that of R22 on average, R417A is more suitable to be applied in heat pump water heaters. Although R134a possess lower discharge temperature and pressure compared to R22, its heating capacity is much smaller than the system adopting R22 and the lubricating oil has to be changed, so R134a is not the suitable ´drop-in´ candidate to substitute R22 in heat pump water heaters.