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Hi, I need to model a thermal storage tank that is powered by an air source heat pump and a PV/T system and is able to provide space heating and domestic hot water. The thermal storage is a stratified tank for which I know bottom - top - average temperature. Also, the thermal storage set point is managed by the heat pump. I have tried several types to model this system, but none of them gives me a realistic output: can anyone suggest which type to use? (I used: Type 563= PV/T, Thermal storage= Type 60c; DHW= Type 4d; ASHP=Type 917).

Hi, I need to model a thermal storage tank that is powered by an air source heat pump and a PV/T system and is able to provide space heating and domestic hot water. The thermal storage is a stratified tank for which I know bottom - top - average temperature. Also, the thermal storage set point is managed by the heat pump. I have tried several types to model this system, but none of them gives me a realistic output: can anyone suggest which type to use? (I used: Type 563= PV/T, Thermal storage= Type 60c; DHW= Type 4d; ASHP=Type 917).