In recent years, Mitsubishi Heavy Industries, Ltd. (MHI) has contributed to the prevention of
global warming by improving the performance of centrifugal chillers. In addition, centrifugal
chillers adopting HFO-1233zd(E), which features the global warming potential equal to carbon
dioxide, were developed and launched as the ETI-Z series in September 2015 to help prevent
global warming directly caused by refrigerant emission. HFO-1233zd(E) has a volume of
refrigerant gas about five times as large as that of the conventionally used refrigerant HFC-134a,
but the newly-developed centrifugal chillers were designed with a compact size equivalent to the
conventional product using HFC134a. In addition, high performance was achieved with a 3%
increase in rated performance.
