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

[Damien Casetta]

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 at 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
> **
> +46.7.60.66.31.45
> +33.6.71.78.03.75
>
>


-- 
*Damien Casetta*

*Chalmers University of Technology *| Energy and Environment | Exchange
student
*INSA Lyon* Génie Energétique et Environnement | Elève ingénieur
**
+46.7.60.66.31.45
+33.6.71.78.03.75
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