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Re: [EnergyPlus_Support] A large number of cooling unmet load hours
I meant to use these report variables:
Output:Variable,"The name of the supply air node",System Node Temp,Hourly;
Output:Variable,"The name of the supply air node",System Node Humidity
Ratio,Hourly;
Richard Raustad wrote:
>
>
> The Zone:Sizing and System:Sizing objects are used to input information
> concerning sizing. Review these inputs carefully.
>
> The advice was to compare these values with values calculated during the
> simulation.
>
> Such as:
>
> Output:Variable,"The name of the supply air node",Zone/Sys Air
> Temperature,Hourly;
> Output:Variable,"The name of the supply air node",Zone Air Humidity
> Ratio,Hourly;
>
> where: "The name of the supply air node" is the node name you gave as
> the outlet of the main AC duct, or cooling coil outlet node, etc.
>
> john_lee68@xxxxxxxxxxx <mailto:john_lee68%40comcast.net> wrote:
> >
> > I am still looking for the response...
> > Thanks,
> > John..
> > ----- Original Message -----
> > From: "john lee68" <john_lee68@xxxxxxxxxxx
> <mailto:john_lee68%40comcast.net>>
> > To: "EnergyPlus Support" <EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com>>
> > Sent: Wednesday, January 27, 2010 5:45:55 PM GMT -05:00 US/Canada
> Eastern
> > Subject: Re: [EnergyPlus_Support] A large number of cooling unmet load
> > hours
> >
> > Thank you Brent for your quick response. Which input (or output)
> > variable, are you referring to? If it is output variable then how can
> > I make sure that these two temperatures are not different.
> >
> > thanks again...
> > John
> >
> > ----- Original Message -----
> > From: "Brent Griffith" <brent.griffith@xxxxxxxx
> <mailto:brent.griffith%40nrel.gov>>
> > To: "EnergyPlus Support" <EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com>>
> > Sent: Tues
> >
> > This sort of thing is usually caused by a mismatch between the
> > parameters used in Sizing:* objects and how the systems actually run
> > during operation. The HVAC controls need to be consistent with the
> > Sizing inputs. For example, check that the node temperatures on the
> > supply deck agree with what is used in the Sizing:Zone design supply
> > air temperature.
> >
> >
> >
> > ----------------------------------------------------------
> >
> > *From:* EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com>
> > [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com>] *On Behalf Of
> > *john_lee68@xxxxxxxxxxx <mailto:%2Ajohn_lee68%40comcast.net>
> > *Sent:* Tuesday, January 26, 2010 3:48 PM
> > *To:* EnergyPlus Support
> > *Subject:* [EnergyPlus_Support] A large number of cooling unmet load
> hours
> >
> >
> >
> >
> >
> > Hello everyone,
> >
> > I am simulating an office building with VAV with Reheat. I am getting
> > a large number of unmet cooling load hours. The heating is fine. I am
> > running it for Chicago weather.
> >
> > TIME COOLING SETPOINT NOT MET {HOURS NON-ZERO} [HOURS]
> >
> >
> >
> > I am using autosize options. My understanding was that it I use
> > autosize options, the systems would be sized to meet the loads.
> > How should I diagnose this - i.e. which parameters to look at etc..
> >
> >
> >
> > I help will be very much appreciated...
> >
> > John
> >
> >
>
> --
> 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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