30 May 2005

DEVELOPMENT OF HIGH PERFORMANCE WATER-TO-WATER HEAT PUMP FOR GROUND-SOURCE APPLICATION


High performance water-to-water heat pump for ground source application was developed by using plate
heat exchanger, new type compressor and the refrigerate cycle with liquid-gas heat exchanger. Firstly, the
performance design program that could compute the refrigerate cycle with liquid-gas heat exchanger was
created. The simulating program could predict heating/cooling capacity, electric power and COP deciding
surface area of heat exchangers, compressor efficiency, compressor displacement, etc. Secondly, the real heat
pump was designed by the result of the program, created, and tested on the performance to compare with the
simulation. As a result, it was computed that cooling COP of the designed heat pump attained 5.5 using the
simulating model, and measured cooling COP of the real heat pump attained the same value.