![]() ![]() An economic analysis is undertaken and a payback period of about 12.7 years is found. A reversible heat pump operation seemed more advantageous especially in the summer months, reducing yearly electric demand by about 84.57%. PV/T average electrical energy output is found to 0.68 kWh/m2/day with an annual average of 177.42 kWh/m2, which leads to an annual electricity surplus of about 5.83%. Results revealed that the increase in solar radiation results in an improvement of the system's thermal-based COP efficiency coefficient reaching 4.49 at 893 W/m2. ![]() Results showed that the average thermal and electric energy efficiency is about 39.65% and 11.38%, respectively. Optimal operations of such a system are achieved based on a simplified mathematical model. Furthermore, a long-term performance study analysis was performed under Tunisian climate to offset domestic electric and hot water loads. A novel dual tank PV/T indirect parallel solar assisted heat pump system (DTPV/T-ISAHP) was investigated in this paper, which filled a gap in the literature. ![]()
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