[TRNSYS-users] Pump control in domestic hot water system

[Amadou OUMAROU OUSMANE]

Dear TRNSYS users,

I'm trying to model a domestic hot water using the type 156 for water
storage. The pump is controlled by the type 165 (2-5 °C as hysteresis). But
the difference between the temperature at the outlet of the collector and
the lower tank temperature is always higher than 2°C. So the pump is always
ON. When I checked in the plotter, it seems like the temperature is equal
to the temperature of the immersed heat exchanger even at night when
there's no radiation.

Can anyone help me fix this please ?

Regards,
Amadou
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