Thermal performance of a compact evaporator coil in household refrigerator-freezers

A high-efficiency evaporator coil, which is placed horizontally between refrigerator and freezer compartments, for household auto-defrost refrigerator-freezers has been developed. Several experiments were performed to investigate the thermal performance of the newly developed compact evaporator coil in a 248l auto-defrost refrigerator-freezer and the results are compared with those of the conventional evaporator. The energy efficiency of the system with newly designed evaporator can be improved by 7%, and the size and material of the evaporator can be reduced by 7% and 40%, respectively, compared with the conventional one.