[TRNSYS-users] COP and power consumption of the Heat Pump with PV cells

[David BRADLEY]

Wojciech,
I am not familiar with Type401. However, there are a number of heat pump 
models in the TESS Libraries and they probably work about the same. The 
problem with the existing models from your point of view is that they 
take the entering conditions (of air and water) and they compute the 
power required by the heat pump. I am not aware of any heat pump models 
that take power available as an input. I think you might still be able 
to achieve your simulation however. You need to first find the threshold 
power above which the heat pump can run (perhaps this would be the rated 
power? perhaps it would be the lowest power listed in the performance 
data?) Run your PV array and whenever its output power is above the heat 
pump's minimum allowable power then run the heat pump. You can write an 
equation that will multiply the thermostat's heat/cool signal by the 
PV's "power available" signal.
Best,
  David



On 10/10/2012 03:33, Malik Wojciech wrote:
>
> Hello
>
> Could anybody give the prompt how to simulate and which components 
> must be used in Heat Pump system combined with the PV cells?
>
> The main assumptions that I have made are: Type 401 combined with Type 
> 94a and with the building Tpe56. It is possible that the PV will 
> support power consumption of the Heat Pump?
>
> As an result of this simulation I would like to achieve information 
> about the COP (it depends of assumed parameters)  and how the COP 
> value varies depending on the season and the weather.
>
> Also I would like to get information about the cost of this 
> combination (PV+ HP) -- how much money we can save using this 
> combination.
>
> Do you have any ideas or suggestions how can I started this simulation 
> and which Types I should use?
>
> I will appreciate any kind of help.
>
> Sincerely
>
> Wojciech
>
>
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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