[Equest-users] Seasonal variation in lighting consumption in monthly peak demand

[Erik Kolderup]

Is the May-Sep drop you're seeing in consumption or peak demand? If it's in
peak demand then it's possible that you are seeing a drop in the
contribution of lighting to coincident peak demand because the time of day
of the peak has shifted in your proposed building compared to your baseline
building.

I suggest looking at the PS-E report, where you can see the max kW for each
end use for each month (non-coincident) as well as the contribution for
each end use to the coincident peak kW each month. You might see that the
coincident peak is at a different time from the lighting peak.

If the drop is in consumption rather than peak demand, then I suppose
you'll need to dig further...

Regards,
Erik

*Erik Kolderup, PE, LEED AP*
erik at kolderupconsulting.com | 415.531.5198 | www.kolderupconsulting.com

On Fri, Sep 26, 2014 at 7:04 AM, Dionisio Franca <dionisiofranca at gmail.com>
wrote:

> Rebecca,
>
> Are there any daylight sensors mistakenly placed on your model?
>
> Dionisio
>
> Em sexta-feira, 26 de setembro de 2014, Rebecca ying <
> ellaying_wong at hotmail.com> escreveu:
>
>> Hi everyone.
>>
>>
>>
>> I am simulating a residential building.
>>
>> In the simulation result of the proposed building, the Area Lights
>> consumption from May to September is very low comparing to that in other
>> months. (With attachment) However, in the baseline building simulation
>> result, the Area Lights consumption keeps average in every month. (With
>> attachment)
>>
>>
>>
>> The lighting schedules used for both buildings are the same. The only
>> difference is the space lighting loads (W/ft2) in two buildings.
>>
>> And, in my design, there are 2 seasons in both buildings. (Summer:
>> 07/April to 06/Oct & Winter: other months). The interior lighting hourly
>> profiles by season for winter and summer are the same.
>>
>> So the lighting consumption should be average in all months. (Right?)
>>
>> But a variation occurred!! Did anyone know any possible reason about
>> that?
>>
>>
>>
>> Thanks so much.
>>
>> Regards,
>>
>> Ella
>>
>>
>>
>>
>>
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