[TRNSYS-users] COP curve inconsistency WW-HP

[Jeff Thornton]

Victor,

The best thing you can do to start  is to isolate the heat pump in a separate project and drive it with various inlet temperature and flow rates to make sure the performance of the machine matches the map.  When you’re sure it’s working correctly that’ll help you track down what’s happening with the rest of your project.

Jeff

Sent from my iPhone

> On Aug 1, 2019, at 10:24 AM, Vitor Leite via TRNSYS-users <trnsys-users at lists.onebuilding.org> wrote:
> 
> 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
> 
>   
> <COP.jpg>
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