15 September 2011

OPTIMIZING HEAT PUMP DESIGN FOR REFRIGERANTS R407C AND R410A


This theoretical study based on actual compressor performance and backed up by experimental evidence shows how condensing temperature can be minimised and evaporating temperature maximised by circuit design and control. The effect of temperature glide in the heat exchangers can be used to good effect with R407C and use of a suction/liquid line heat exchanger can improve evaporator utilisation. With R410A,
temperature differences are limited by other factors and compressor performance is better. Seasonal analysis for space heating both underfloor and radiator, using the latest vapour injection scroll technology indicates where R410A shows advantages over R407C.