This work investigates the impact of varying the evaporator load on the performance and parameter characteristics of a heat pump.A series of experiments have been done on a vapor compression cycle heat pump which is r...This work investigates the impact of varying the evaporator load on the performance and parameter characteristics of a heat pump.A series of experiments have been done on a vapor compression cycle heat pump which is run with R134a.The evaporator in this system is a coil submerged in a water/glycol bath accommodated in a thermally insulated steel container.The load of the evaporator is changed through a heater in this bath with a capacity of 1.8 kW.The glycol bath is mixed through an electric stirrer.The results showed that system pressures and temperatures generally increase and then decrease after a certain heat load has been imposed.The same trend is for COP of the refrigeration system;hence there is an optimum load point to which the COP increases to a maximum and then starts to decline.This optimum point corresponds to the best efficiency of the system.展开更多
文摘This work investigates the impact of varying the evaporator load on the performance and parameter characteristics of a heat pump.A series of experiments have been done on a vapor compression cycle heat pump which is run with R134a.The evaporator in this system is a coil submerged in a water/glycol bath accommodated in a thermally insulated steel container.The load of the evaporator is changed through a heater in this bath with a capacity of 1.8 kW.The glycol bath is mixed through an electric stirrer.The results showed that system pressures and temperatures generally increase and then decrease after a certain heat load has been imposed.The same trend is for COP of the refrigeration system;hence there is an optimum load point to which the COP increases to a maximum and then starts to decline.This optimum point corresponds to the best efficiency of the system.
