[TRNSYS-users] Heat exchange connected to the solar collector

[L.Mei at lboro.ac.uk]

Dear trnsys users,

I  meet the problem with the heat exchange in the water tank (Type 60f) connected to the solar collector (Type 73) which is controlled by a pump (when the Tin>=Tout, the pump running). When the pump during the off period, the water of the heat exchange keeps the same temperature at the time step of the pump turned off. It is much higher (Around 10 degree)  than the water temperature in the tank surrounding the heat exchange.  That means there are no heat conducted to the tank from the heat exchange when no flow running in the solar collector. This caused the problem of reducing the running hours of the solar collector and so reducing the solar fraction.

Any helps are available? 

Li Mei