[Equest-users] lighting-schedule&lighting-demand

[Nick Caton]

Heinrich, 

 

I've found something that may help or be a red herring... 

 

I tried running the simulation so I could view a few things in the spreadsheet views, but I didn't have the Dusseldorf weather file on-hand, so without changing anything else I substituted a local weather file I had on my computer for Kansas City, Missouri.

 

The results (see attached consumption/demand reports ) interestingly show the area lighting fluctuating a good deal more than the demand report you provided, suggesting whatever is off may be weather-dependant.

 

I do not see any daylighting specified for the interior lighting, which was my initial guess, so there I am at a loss!  I'm not sure how else the modeled interior lighting loads may be affected by the weather file/site properties used (i.e. latitude/longitude)... Does "Area Lighting" cover more than interior lighting loads?  Perhaps someone more experienced can comment...?  

 

I'll be interested to hear your findings,

 

~Nick

 

PS: I'm unsure of whether a space being unoccupied might override any hourly values entered in a lighting schedule...  I had a hunch this might be the case since you appeared to have a clean block of months with uniformly lowered demand.  Even so, I think I've verified it cannot  be a holiday scheduling issue by changing your custom holiday schedule to "No holidays," and still observing fluctuating area lighting loads.  

 

 

 

NICK CATON, E.I.T.

PROJECT ENGINEER

25501 west valley parkway

olathe ks 66061

direct 913 344.0036

fax 913 345.0617

Check out our new web-site @ www.smithboucher.com 

 

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of heinrich at ib-bauklima.de
Sent: Monday, April 12, 2010 7:34 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] lighting-schedule&lighting-demand

 

Dear eQUEST-Users,

 

 

this is a great community for troubleshooting in eQUEST.

So hopefully you can help me solving my problem with an eQUEST-model.

 

I have some serious trouble to model the lighting schedules of my baseline building.

I defined the schedules as told from the client.

 

When I select some of the lighting schedules (EXHIBIT,ARCHIVE,CONFER,KITCHEN,GARAGE) I get changes in lighting demand over the year (Demand_Baseline_28f.pdf). 

But this is not correct. They should not change, because each of the lighting schedules are modeled the same each week and do not change over the year.

When I deselect these schedules I get constant lighting demands over the year (BASELINE_28e.pdf).

I can't find any mistake in the lighting schedules.

 

Anybody know how to solve this?

Please feel free to check my eQUEST-model.

 

Thanks,

 

Heinrich

 

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