Multi-objective optimization of hybrid photovoltaic–thermal collectors integrated in a DHW heating system

•A procedure for simultaneously analyzing the performance of a PV/T is presented.•Multi-objective optimization of PV/T with a DHW heating system is performed.•The studied objectives functions have not been reported in the literature.•Chosen design parameters have not been selected to be optimized in previously.•Clear trade-offs between solutions can be observed in the final Pareto optimal sets.

A mathematical model for making quantitative and qualitative predictions regarding the performance of water-cooled photovoltaic/thermal collectors integrated with a building domestic hot water preparation system has been developed. A genetic algorithm has been applied to the model in order to simultaneously find optimal design parameters affecting photovoltaic/thermal collectors’ feasibility. For all formulated problems, Pareto optimal sets of conflicting solutions are obtained giving the designer information on the trade-off relationships between solutions.