15 November 2018

Performance of centrifugal chiller and development of heat pump using a low-GWP refrigerant

The manufacture of HFCs has been restricted by increasingly stringent regulations, with the aim of reducing global
warming. Low-GWP refrigerants are needed for air-conditioning and refrigeration equipment. We have developed
and commercialized centrifugal chillers using the low-GWP refrigerant R-1234ze(E) for capacities from 1055 to 17581
kW, and using R-1233zd(E) for capacities from 527 to 2461 kW. We have also developed a centrifugal heat pump
system that is capable of using a low-GWP refrigerant to produce pressurized hot water at 200 °C, with a coefficient
of performance (COP) of 3.5.