Abstract
An equation has been developed for the COP of vapor compression systems integrated with thermal energy storage (TES) using phase change materials (PCM) as the storage media. The derivation is based on the first principle and the coefficient of performance (COP) definition for heat pumping systems, which describes the overall system COP for systems integrated with TES. The equation is linked to the COPs when charging the TES and discharging the TES. To provide validation of the equation, a 10.5 kW (3T) R410A residential system model benchmarked by data from production systems has been used to generate the system COP when integrated with TES at various conditions. The performance data thus generated have been used to confirm the equation prediction and to evaluate whether TES integrated with vapor compression systems offers energy savings and under what conditions.
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