[Equest-users] lighting-schedule&lighting-demand
Heinrich.ib-bauklima.de
heinrich at ib-bauklima.de
Tue Apr 13 02:03:40 PDT 2010
Scott,
Thank you for your hint.
So the the results module demand report shows different monthly lighting
loads according to coincident electrical peak end-use time.
PS-E-Report shows for each month identical non-coincident max lighting loads
and different coincident peak lighting loads at electric peak end-use time.
You can see that monthly coincident electrical peak end-use time is changing
during the year (16:00,15:00,12:00).
So it is no serious bug.
This a great site for trouble shooting eQUEST.
Heinrich
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Von: Scott Criswell [mailto:scott.a.criswell at gmail.com]
Gesendet: Dienstag, 13. April 2010 01:55
An: Heinrich.ib-bauklima.de
Cc: 'Nick Caton'; equest-users at lists.onebuilding.org
Betreff: Re: [Equest-users] lighting-schedule&lighting-demand
This is not a bug - just a matter of understanding the results being
presented.
In the eQUEST results module Demand report, what you are looking at is the
breakdown of enduse energy use for the hour of highest overall coincident
electric (and gas) demand for each month. For any given month, the highest
coincident demand may or may not occur at a time when the lighting load is
at its peak. Hence the variation in monthly lighting demand results.
If this report indicated the peak non-coincident load for each enduse, then
you would see consistent lighting demand results, but their sum would not
(necessarily) add up to the building peak, since not all enduses are likely
to all peak at the same time from month to month.
If you review the PS-E report in the detailed simulation results you will
see both the peak coincident and non-coincident demand results listed for
each month.
- Scott
Heinrich.ib-bauklima.de wrote:
Nick,
and to all eQUESTERs who are still wondering about my model-output.
It seems to be a bug in the generated demand-output of the eQUEST-run.
When I write out the hourly reports of the lighting loads there is no
monthly fluctuation in the peak lighting loads.
Please correct me if I'm wrong.
Heinrich
--------------------------------------------------
b +e
Ingenieurbüro
für Bauklima und
Energiekonzeption
Dr. Heinrich Post
Brienner Str. 48
D-80333 München
Fon +49 (0) 89/54320678
Fax +49 (0) 89/54320679
Mobil +49 (0) 160/7225740
<blocked::mailto:dr.post at ib-bauklima.de> mailto:dr.post at ib-bauklima.de
Besuchen Sie uns im Internet:
www.ib-bauklima.de <blocked::http://www.ib-bauklima.de/>
--------------------------------------------------
--------------------------------------------------
b +e
Ingenieurbüro
für Bauklima und
Energiekonzeption
Dr. Heinrich Post
Brienner Str. 48
D-80333 München
Fon +49 (0) 89/54320678
Fax +49 (0) 89/54320679
Mobil +49 (0) 160/7225740
<mailto:dr.post at ib-bauklima.de> mailto:dr.post at ib-bauklima.de
Besuchen Sie uns im Internet:
www.ib-bauklima.de <http://www.ib-bauklima.de/>
--------------------------------------------------
_____
Von: Nick Caton [mailto:ncaton at smithboucher.com]
Gesendet: Montag, 12. April 2010 17:46
An: heinrich at ib-bauklima.de; equest-users at lists.onebuilding.org
Betreff: Re: [Equest-users] lighting-schedule&lighting-demand
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.
cid:489575314 at 22072009-0ABB
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
--------------------------------------------------
b +e
Ingenieurbüro
für Bauklima und
Energiekonzeption
Dr. Heinrich Post
Brienner Str. 48
D-80333 München
Fon +49 (0) 89/54320678
Fax +49 (0) 89/54320679
Mobil +49 (0) 160/7225740
<mailto:dr.post at ib-bauklima.de> mailto:dr.post at ib-bauklima.de
Besuchen Sie uns im Internet:
www.ib-bauklima.de <http://www.ib-bauklima.de/>
--------------------------------------------------
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