16 September 2011

EVALUATION OF ENERGY CONSERVATION BY USING HOT WATER CENTRIFUGAL HEAT PUMP WITH INVERTER MOTOR DRIVE


In terms of greenhouse gas reduction, it is indispensable to develop high
performance equipment for energy conservation. The high performance hot water heat pump using a centrifugal compressor with inverter drive has been developed. The heat pump supplies continuous max 90°C hot water by using an exhaust heat source water temperature range from 35 to 50°C. These performance characteristics have been verified on a customer’s factory for more than one year examining the durability of the heat pump, following the capability of hot water leaving temperatures, control stability by fluctuating heat load and heat source water entering temperature. The reduction amount of CO2 emissions
and running costs have been calculated using the heat load pattern of a general factory with measured performance. Reductions of about 47% of the annual running cost and about 59% of the CO2 emission by replacing of the boiler with the hot water heat pump, are shown in this report.