[TRNSYS-users] Water-to-water heat pump - Heat rate to load control

[Damien Casetta <damien.casetta@gmail.com>]

Hi,

I am modelling a ground-source heat pump system including a water-to-water heat pump (type 927), a borehole heat exchanger (type 557b) and a building demand profile. 

I have read a couple of messages in the archives about this topic but I haven´t understood correctly the few addressing my specific issue. 

Here is my point. I assume the heat pump to meet the building demand. The aim is then to force the heat pump load and observe how the system behaves (COP, ground loop fluid temperatures). 

I would be able to do this with an external MATLAB code (with COP values interpolated from catalog data) but it would be a shame not to harness TRNSYS potential (there is no need to re-invent the wheel as I read in a previous message). 

Let me put in other words: how to control a heat pump load? 

I have read about a trick to handle this, with a "lump" temperature but I don't get the idea behind it. Any other explanations is welcomed. 

Thanks in advance,

Best regards,

--

Damien Casetta

Chalmers University of Technology | Energy and Environment | Exchange student

INSA Lyon Génie Energétique et Environnement | Elève ingénieur 

 
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