A Novel CCHP System Based on a Closed PEMEC-PEMFC Loop with Water Self-Supply

•The H2-O2 PEMFC adopts a DEAC operation mode to achieve 100 % utilization of reactants.•PEMEC-PEMFC achieves self-sufficiency of reactants with water self-supply.•The number of PEMEC varies according to solar radiation and light time.•The hourly loads of households can be satisfied by adopting the pre-operation mode.