Re: [TRNSYS-users] Power use of heat pump is constant

[David BRADLEY <d.bradley@tess-inc.com>]

Amirreza,

 If the air and water conditions at the inlet of your heat pump are always outside the range of the performance map then the power and COP will always come back with the same values. Of course it is also possible that the performance map that you are using is set up in such a way that the COP is always the same no matter what the inlet conditions. The *.lst file may have some additional clues in it.

kind regards,

 David

On 01/03/2021 05:16, Heidari Amirreza via TRNSYS-users wrote:

Hello,

To model a heat pump water heating system I am using type 938. In theory, the COP of the heat pump should decrease with the increase of storage tank temperature. Also, it should increase with the increase of outdoor air temperature. However, using type 938 the power consumption is always the same. Would you please let me know how it can be modified in my simulation?

 

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Doctoral Assistant, Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland

Email:

amirreza.heidari@epfl.ch

amirrezaheidarysbu@gmail.com

Phone: +41 21 69 57221

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