24 June 2014

CONTROLLING THE EVAPORATION PRESSURE OF A HEAT PUMP TO IMPROVE THERMAL COMFORT AT LOW COOLING LOAD CONDITION


In order to develop a control method for air-source heat pumps that can be used to achieve better indoor thermal comfort at a low cooling load condition than the current control method, a new method of the evaporation pressure control based on the evaporator outlet
pressure reading was developed. The changes in the stability of indoor air temperature and power consumption were measured changing the compressor frequency in accordance with
the new control method. The new control method appeared to improve the stability of indoor air temperature and have a potential to reduce power consumption than the current
evaporation pressure control method based on the evaporator outlet temperature reading.