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[EnergyPlus_Support] Re: Energy and Electricity outputs
I am running 3 simple Heat pumps serving 3 simple classes.
I know the RDD file very well but I don't know which report variable
to choose in order to find the electricity demand by the Heat
pumps.For the cooling and heating energy supplied for the room air, I
use the zone/sys sensible heating and cooling report/ Is this
correct ?
Another thing : I noticed that the report meter :
Electricity:Facility gives me a value much bigger than the sum of :
zone/sys sensible heating + sensible cooling + lightning. can you
tell me why ?
Thanks
Itamar
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte"
<mjwitte@g...> wrote:
> That depends on the particular system type. Chillers have a report
> variable for COP. For other equipment types, you need to report
the
> load and energy use and calculate COP. Look in the RDD output file
> for a complete list of available report variables for your run.
>
> Mike
>
>
>
>
> On 7 Oct 2003, at 9:16, itamargoldberger wrote:
>
> > Michael Hi !
> > I want to find the COP of The systems in my file.
> > As you know, The COP is changing with the enviromant and inside
> > demand temperatures .
> > All I wanted is an output telling me what was the load on the HVAC
> > system for cooling/heating and how much electricity it demanded.
All
> > the output report variables I found were the energy devided by the
> > time ( for example : x [j] for hourly energy and x/3600 [W] for
that
> > hour electricity demand . how can I get the COP from those
details ?
> >
> > Thanks
> >
> > Eng. Itamar G.
> > NBRI Technion
> >
> >
> >
> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte"
> > <mjwitte@g...> wrote:
> > > I am not sure if I understand your question completely. Total
> > > electric consumption [J] for the building and systems is
available
> > > from:
> > >
> > > Report Meter,
> > > Electricity:Facility, !- Meter_Name
> > > hourly; !- Reporting_Frequency
> > >
> > > By dividing this result by the length of the reporting period,
this
> > > can also be used to represent demand.
> > >
> > > Or if you add an ELECTRIC LOAD CENTER:DISTRIBUTION object, then
you
> > > can report electric demand [W] as a report variable:
> > >
> > > Report Variable,
> > > *, !- Key_Value
> > > Total Electric Demand, !- Variable_Name
> > > Hourly!- Reporting_Frequency
> > >
> > > See the Input Output Reference, p. 702-704 and example file
> > > Generators.idf
> > >
> > > Mike
> > >
> > >
> > >
> > > On 1 Oct 2003, at 11:08, itamargoldberger wrote:
> > >
> > > > Which output meter or variables do I need to ask in order to
> > compare
> > > > energy [J] and Electricity [W] at the same timestep ? Thanks
> > > >
> > >
> > >
> > >
> > > ========================================================
> > > Michael J. Witte, GARD Analytics, Inc.
> > > EnergyPlus Testing and Support
> > > EnergyPlus-Support@g...
> >
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> ========================================================
> Michael J. Witte, GARD Analytics, Inc.
> EnergyPlus Testing and Support
> EnergyPlus-Support@g...
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