[EnergyPlus_Support] Re: PTHP staged operation

["anarui.oliveira" <anarui.oliveira@xxxxxxxxx>]

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, 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
> 
> UCF - From Promise to Prominence: Celebrating 40 Years
>



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