Abstract
ABSTRACT A comparative analysis of the Coefficient of Performance (COP) and the Energy Efficiency Ratio (EER), based on the technical data of 430 different models of air-to-water heat pumps (AWHPs) as well ground-source heat pumps (GSHPs), at certain conditions of ambient air, ground source and water outlet from the heat pump (HP) temperatures, is performed. The results, presented in graphical and tabular form, give the COP and EER values against the HPs nominal capacity and the correlation between COP and EER with the temperature rise ΔΤ along the HP. By averaging the performance values of all AWHPs or GSHPs models, equations of polynomial regression that give the relationship between average COP or EER and ΔΤ values were also calculated. It is shown that inverter-driven HPs generally have higher COP and EER as compared to the fix-capacity HPs, for the same heating or cooling range. Also, performance is highly depended on ΔΤ.
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