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Re: [EnergyPlus_Support] Fwd: Re: Compact PTHP expanding issues
No. the Packaged Terminal Heat Pump Total Zone Cooling Rate is the
"delivered" capacity or what is delivered through the zone inlet node.
It should be nearly equal to the thermostat request. Compare the PTHP
report variable to the thermostat report variable Zone/Sys Sensible Load
Predicted. The cooling coil report variable DX Coil Total Cooling Rate
will show you the total load met by the system including the impact of
fan heat and outside air.
anarui.oliveira wrote:
>
> Unless...
> Reviewing the I/O reference... does "Packaged Terminal Heat Pump
> Total Zone Cooling Rate" include cooling effect due, not to the HVAC
> system itself, but to outside air insufflation?
> Which would be the correct variables to check the actual
> heating/cooling loads addressed by the HVAC system, that is, that
> actually correspond to the PTHP working, and not just to the gross
> heat added/removed by air inlets/outlets?
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com>, "anarui.oliveira"
> <anarui.oliveira@...> wrote:
>
> Thank you.
> > > Also, after correcting all the initial errors, although the zone
> in question has a scheduled cooling setpoint of 25ºC and a scheduled
> heating setpoint of 20ºC, the model seems to be trying to control the
> zone to a single setpoint of 20ºC at the early months of the year...
> and turning on in cooling mode unnecessarily before zone temperature
> reaches 25ºC...
> > > Any idea what I should be double checking here to avoid this?
> Ana.
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com>, Linda Lawrie <linda@>
> wrote:
> >
> > The basic problem has been corrected by uploading a new
> ExpandObjects.exe
> >
> > File : /Release_pieces/ExpandObjects.exe
> > Description : ExpandObjects updated to reflect problems in
> > expanding object: COMPACT HVAC:ZONE:PTHP.
> >
> > You can access the file at the URL:
> >
> http://groups.yahoo.com/group/EnergyPlus_Support/files/Release_pieces/
> <http://groups.yahoo.com/group/EnergyPlus_Support/files/Release_pieces/>
> ExpandObjects.exe
> >
> >
> > In your case, however, you will need to delete some of the Compact
> > expansion you seem to have left in the file:
> >
> > Compact Any Number (Schedule Type)
> > and
> > COMPACT HVAC-ALWAYS 1
> > COMPACT HVAC-ALWAYS 4
> > (above 2 are schedules).
> >
> > The ExpandObjects program does not scan the input file and make
> sure
> > the schedules or scheduletypes it creates are unique.
> >
> > Linda
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
> --- End forwarded message ---
>
>
--
Richard A. Raustad
Senior Research Engineer
Florida Solar Energy Center
University of Central Florida
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