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

Hi, 

I am trying to handle this problem by controlling the temperature. Let me remind you that I want to control the heat load of an heat pump in heating mode. 

Here is how I am trying to proceed : 

- I control the temperature exiting the heat pump
- I fix a temperature set point (with an aquastat - heating mode) at 50 C.  
- I vary the supply temperature (entering the heat pump) according to the heating demand. 

The heating demand is based on hourly loads. 

What do you think about it? 

I am not very satisfied but I will give it a try. I am sure there is a much simpler way to do it. 


Thanks in advance for your help. 

Best regards,

On 1 June 2012 18:10, Damien Casetta <damien.casetta@gmail.com> wrote:
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 




--
Damien Casetta

Chalmers University of Technology | Energy and Environment | Exchange student
INSA Lyon Génie Energétique et Environnement | Elève ingénieur 
 
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