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Re: [EnergyPlus_Support] Summary reports problem - Demand end-use is 0 W, while energy end-use is not 0kWh





I'm going to submit a ticket in Help desk, I think this might be a bug. As far as I know LEED summary report table " EAp2-4/5. Performance Rating Method Compliance" should report annual peak demand for the individual end uses and not demand of the individual end use at time step of building peak demand.

Thanks Jim, Jason and Anderson!

Santiago




2014-07-04 9:34 GMT-03:00 Anderson Letti anderson.a.letti@xxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx>:
 

Santiago,
I have the same problem.

Jason, if it is the way you say, why this problem didnt it happen with older versions?

Regards,
Anderson


2014-07-03 17:09 GMT-03:00 Jason Glazer jglazer@xxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx>:

 

I believe the demand column uses the same values as shown in
the Demand End Use Components Summary report.

Jason

On 7/3/2014 2:46 PM, Santiago Velez santiagogvelez@xxxxxxxxx

[EnergyPlus_Support] wrote:
>
>
> Yes!, thank you Jason, that makes total sense, my mistake.
> Actually I arrived at that table after seeing a similar
> situation in the LEED summary table *EAp2-4/5. Performance
> Rating Method Compliance (below)*

> Any ideas about this one?
>
> *
> *
> *EAp2-4/5. Performance Rating Method Compliance*

>
> Electric Energy Use [GJ] Electric Demand [W] Natural Gas
> Energy Use [GJ] Natural Gas Demand [W] Additional Energy Use
> [GJ] Additional Demand [W]
> Interior Lighting 209.22 15226.29 0.00 0.00 0.00 0.00
> *Exterior Lighting* *67.23* *0.00* 0.00 0.00 0.00 0.00

> Space Heating 0.12 0.00 29.71 123993.87 0.00 0.00
> Space Cooling 992.21 75817.96 0.00 0.00 0.00 0.00
> ......... ..............
>
>
>
>
>
>
> *
> IDF input
>
> Exterior:Lights,
> Exterior Lights, !- Name
> On, !- Schedule Name
> 4250, !- Design Level {W}
> AstronomicalClock, !- Control Option
> General; !- End-Use Subcategory
>
> *
> *

> *
>
>
> 2014-07-03 16:03 GMT-03:00 Jason Glazer jglazer@xxxxxxxx
> <mailto:jglazer@xxxxxxxx> [EnergyPlus_Support]
> <EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx>>:
>
> __

>
> Remember that the Demand End Use Components Summary is the
> power use for each end use component at the specific "time
> of peak" shown at the top of the table when the peak demand
> for the entire building for that energy was set. Exterior
> lighting for example would probably not be part of the peak
> electrical demand because it occurs at night and the
> peak is
> probably set during the day. The same goes for heating and
> cooling depending on the timing of the peak demand for the
> building.
>
> Jason
>
> On 7/3/2014 12:20 PM, Jim Dirkes
>
> jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx
> <mailto:jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx>

> [EnergyPlus_Support] wrote:
> >
> >
> > I think I have seen this when the kW value is less
> than 0.5.
> > I think some rounding occurs in the report creation. Does
> > that apply for your system?
> >
> > *James V Dirkes II, PE, BEMP, LEED AP**
> > **www.buildingperformanceteam.com
> <http://www.buildingperformanceteam.com>*

> > <http://www.buildingperformanceteam.com/>*
> > **Energy Analysis, Commissioning & Training Services**
> > *1631 Acacia Drive, Grand Rapids, MI 49504USA
> > 616 450 8653
> >
> > *From:*EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx>
> > [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx

> <mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx>]
> > *Sent:* Thursday, July 03, 2014 1:01 PM
> > *To:* EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx>

> > *Subject:* [EnergyPlus_Support] Summary reports problem -
>
> > Demand end-use is 0 W, while energy end-use is not 0kWh
> >
> > Dear group,
> >
> > Has anyone encountered this problem before? The summary
> > report shows 0 W in the *Demand End Use Components
> Summary
> > table, *while still having energy reported for that
> end-use
>
> > not 0?
> >
> > This happened in different projects and for different
> > end-use categories, eg. this case *Exterior
> lightin*g, or on
> > another project *cooling and heating*.
>
> >
> > Any thoughts on what might be the problem?
> >
> > Regards,
> >
> > Santiago
> >
> >
> >
> >
>
>
>
>
>





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Posted by: Santiago Velez <santiagogvelez@xxxxxxxxx>


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