[EnergyPlus_Support] Re: GSHP Modeling Question about spreadsheet parameters

["Elreq" <tolteca33@xxxxxxxxx>]

Thanks for confirming, I aksed this since I having troubles with the
GSHP modeling:
I have estimated the coefficients of the GSHP using the Equation-Fit
model, having errors less than 10%, but the results of the simulation
show that the performance of the heat pump is not as the catalog
suggests, in particular, for the heating mode, I get a very low
temperature difference between the inlet and outlet temperature of the
water, a maximum of 5 ºC where it should be more than 10 ºC.

I am not sure if the error is on the coefficients or if it is in the
plant side, where I have an low temperature radiant sytem of constant
flow, which worked fine before implementing the Heat Pump.

In both examples, the GSHP-GLHE.idf and GSHP Simple-GLHE.idf from the
Eplus documentation, the inlet and outlet temperatures in the load
side are almost the same for the heating mode, this doesnt seem to be
right either.

Suggestions appreciated.

Regards,
Santiago







-- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Sankar Padhmanabhan
<sankar.padhmanabhan@...> wrote:
>
> Santiago,
> Yes you are right. Entering water temperature means the condition of 
> water that enters the HEAT PUMP.
> 
> Regards
> Sankar
> 
> Elreq wrote:
> >
> > Dear Forum,
> >
> > I am modeling a GSHP system, for which I used the spreadsheets for
> > generating the coefficient parameters (both parameter estimation and
> > equation fit)that need to be introduced in the E+ GSHP objects. But
> > during the process I ran into a confusion about the terms of the
> > parameters on the spreadsheet; my question is:
> > Is the Load Side Entering Water Temperature referring to the water
> > that is entering the heat pump or that is entering the zone to be
heated?
> >
> > I have assumed that it is the first, that is, the water that is coming
> > into the heat pump after circulating the zone to be heated, but I ask
> > this just to make sure.
> >
> > Thanks in advance
> > Santiago
> >
> >  
> 
> -- 
> Sankar Padhmanabhan
> Graduate Research Assistant
> PhD Student
> Mechanical & Aerospace Engg
> Oklahoma State University,
> Stillwater, OK-74078
> Ph:405-744-4380
>



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