Development and performance of a dual tank solar-assisted heat pump system

The system modes of operation were validated experimentally using a test apparatus built at the University of Waterloo. Annual simulations of system performance for a single-family residential home indicate that the dual tank SAHP system developed provides significant energy savings in comparison to a traditional solar domestic hot water system. Using a benchmark comparison of a standard electric domestic hot water system and a solar domestic hot water system, the dual tank SAHP increased energy savings from 60% to 69% for 7.5 m2 solar collector area. Applying the system to a larger load offers the potential for significant energy and cost savings, which would improve economic justifiability.