[EnergyPlus_Support] Re: GSHP Parameter coefficient generator

["Alan Jackson" <alanjackson7@xxxxxxxxx>]

Edwin

Thank you for your response. I have expanded my dataset and I believe I have enough information for a good curve fit. I am looking a the ParamEstimator Tab and do not see R410a listed as a refrigerant.

Is this an acceptable refrigerant for these calculations?

-
aj

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Edwin Lee <leeed2001@...> wrote:
>
> I think the basic answer is that you want the data to cover the spectrum of
> operation for that component during the simulation.  The curve fit will fit
> best within the data provided.  Extrapolation from that data may result in
> inaccuracies.
> The input to the utility requires that each input must vary.  If a constant
> is given for entering air temperature throughout your data points, without
> any variation, a curve fit won't really make sense, and the spreadsheet tool
> may give non-sensible answers.
> A more advanced tool is currently under development which will allow the
> user to easily enter the tabulated data as found in a heat pump data sheet
> along with the correction factors which are also found.  This is used to
> develop a large dataset which will then result in a good quality curve fit.
>  For the spreadsheet the user must apply these manually.
> 
> Edwin
> 
> On Wed, Jun 3, 2009 at 4:57 PM, Alan Jackson <alanjackson7@...> wrote:
> 
> >
> >
> > This is my first go around at modeling a GSHP in Energyplus and I am going
> > through the documentation for the parameter-coefficient generator
> > spreadsheet and needed some feedback. I have all the manufacturer
> > information as far as performance values. My question relates to the amount
> > of data required.
> >
> > The user manual states "The data points must have varying inlet conditions
> > (e.g. water flow rates, inlet water temperatures, etc.) that covers the
> > entire range of the heat pump operating conditions."
> >
> > When they say "covers the entire range" doe s this mean we would need to
> > enter both part load and full load conditions? or is it possible to get
> > useful outputs with varying temperatures at full load ratings?
> >
> > I think I already know the answer to this but looking for some
> > confirmation.
> >
> > Thanks
> >
> > -
> > aj
> >
> >  
> >
>




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