[TRNSYS-users] COP curve inconsistency WW-HP

[Vitor Leite]

Hello everyone,

I got the results from a simulation and I think I am getting inconsistent results when comparing the heat pump COP and comparing it normalized performance data sample included with the component, which is the one I am currently using (type 927).

The system is basically two identical heat pumps (50RT) being controlled by a multi-stage differential controller. (which is also controlling the flow rate for both source side and load side pumps). So for the load side (connected to a vertical heat exchanger) there is only really small changes in temperature and the flow-rate goes from 0 to 0.5 to 1 following the number of H.Ps on.
Load side flow-rate also goes from 0 to 0.5 to 1 but there are bigger temperature changes according to the demand.

But, according to the performance data, during heating mode, the load side flow-rate should no change normalized capacity and if the load side temperature increases, normalized capacity should decrease. Which was not what happened with my results.

Can someone with a better understanding about H.Ps take a quick look and see if this graph is reasonable compared to the performance curve?

Thanks in advance


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