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

Yes!, thank you Jason, that Â makes total sense, my mistake.Â

Actually I arrived at that table after seeing a similar situation in the LEED summary tableÂ 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,
Â Â Exterior Lights, Â Â Â Â !- Name

Â Â On, Â Â Â Â Â Â Â Â Â Â Â !- Schedule Name
Â Â 4250, Â Â Â Â Â Â Â Â Â Â !- Design Level {W}

Â Â AstronomicalClock, Â Â Â !- Control Option
Â Â General; Â Â Â Â Â Â Â Â !- End-Use Subcategory

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

Â

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 [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/>*
> **Energy Analysis, Commissioning & Training Services**
> *1631 Acacia Drive, Grand Rapids, MI 49504USA
> 616 450 8653
>
> *From:*EnergyPlus_Support@xxxxxxxxxxxxxxx
> [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx]
> *Sent:* Thursday, July 03, 2014 1:01 PM
> *To:* 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
>
>
>
>