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Re: [EnergyPlus_Support] Re: PTHP staged operation
You will notice that the curves for stages 1 through 4 are all the same.
So it would be reasonable to use the same curves. You should, however,
verify that these curves represent the unit you are modeling.
anarui.oliveira wrote:
>
> Thank you.
> Any suggestion as to what permormance curves to use for 2-stage
> multispeed DX Cooling and Heating coils? I found one ExampleFile, but
> with four stages... would it be reasonable to use the same curves for
> a 2-stage system?
>
> Ana.
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com>, Richard Raustad
> <RRaustad@...> wrote:
> >
> > Refer to the documentation for
> > UNITARYSYSTEM:MULTISPEEDHEATPUMP:AIRTOAIR. The PTHP or
> > UnitarySystem:HeatPump:AirToair objects can not simulate multi-
> speed
> > cooling or heating coils.
> >
> > anarui.oliveira wrote:
> > >
> > > Hi again.
> > >
> > > Going through the documentation, I got the idea that I can
> substitute
> > > the default DX COOLING COIL in a PTHP by a multi-speed one to get
> a
> > > staged cooling system, but there is no equivalent DX HEATING COIL
> that
> > > can model a staged heating system (whithin a PTHP model)... is
> that so,
> > > on both accounts?
> > >
> > > Is there any alternative to approximate the performance of a PTHP
> with
> > > multiple compressor stages, when in heating mode?
> > >
> > > Regards,
> > > Ana Rui.
> > >
> > >
> >
> > --
> > Richard A. Raustad
> > Senior Research Engineer
> > Florida Solar Energy Center
> > University of Central Florida
> > 1679 Clearlake Road
> > Cocoa, FL 32922-5703
> > Phone: (321) 638-1454
> > Fax: (321) 638-1439 or 1010
> > Visit our web site at: http://www.fsec.ucf.edu <http://www.fsec.ucf.edu>
> >
> > UCF - From Promise to Prominence: Celebrating 40 Years
> >
>
>
--
Richard A. Raustad
Senior Research Engineer
Florida Solar Energy Center
University of Central Florida
1679 Clearlake Road
Cocoa, FL 32922-5703
Phone: (321) 638-1454
Fax: (321) 638-1439 or 1010
Visit our web site at: http://www.fsec.ucf.edu
UCF - From Promise to Prominence: Celebrating 40 Years
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