In-situ performance test and simulation of an air source heat pump

In this study, in-situ performance test of a 20 RT (70 kW) air-to-air heat pump which has a feature of recovering ventilation energy is carried out. S ince test conditions such as indoor and outdoor air conditions cannot be co ntrolled to satisfy the standard test conditions, experiments are done with the inlet air conditions as they exist. From the experimental data obtaine d with the non-standard test conditions, simulation program is developed to estimate the performance of standard test conditions. The map-based compre ssor model, epsilon -NTU method with the assumption of refrigerant-side mix ed and air-side unmixed and necessary parameters determined from the measur ements are used. From the simulation, performance of a large capacity air s ource heat pump for various conditions and effects of ventilation are calcu lated. This study provides method of predicting the performance of air sour ce heat pumps in which in-situ performance test is necessary.