[Equest-users] Daylighting and heating penalty

[Carol Gardner]

That would be my guess too.

Carol Gardner

Aulbach, John wrote:
> Scott:
> Just a quick shot. You may decreasing lighting (and thus not getting 
> the heating energy provided by that light), but you are certainly 
> adding a bunch more in solar gain. Being originally from Chicago, I 
> remember sitting in my parent's car in the dead of winter, but wanting 
> to take my coat off with the full winter sun shining into the car windows.
> I will see about looking at your model later.
> John R. Aulbach, PE, CEM
> /Project Manager/
> Nexant, Inc.
> 701 West Kimberly Ave., Suite 245
> Placentia, CA 92870-6342 USA
> Phone: 714-524-4402
> Fax: 714-524-4407
> email: jaulbach at nexant.com <mailto:jaulbach at nexant.com>
>
> ------------------------------------------------------------------------
> *From:* equest-users-bounces at lists.onebuilding.org 
> [mailto:equest-users-bounces at lists.onebuilding.org] *On Behalf Of 
> *Scott Hackel
> *Sent:* Monday, December 01, 2008 11:30 AM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* [Equest-users] Daylighting and heating penalty
>
> I have noticed that on a couple of my eQUEST models, when daylighting 
> is used, that turning the daylighting controls on creates a small 
> _reduction_ in heating energy. Intuition (and a number other modeling 
> projects) suggests that the opposite should occur; when daylighting is 
> implemented the decrease in lighting energy should create an 
> _increase_ in heating energy. In my model this occurs largely in the 
> winter months, so it is not likely to be due to reheat effects. And 
> the load component reports do not reveal this increase, so I don’t 
> know what part of the load is changing.
>
> In one example, I’m doing a small daylighting study on a typical 
> office unit in Wisconsin…I’ve attached the .inp and .pd2 files for 
> your review. I have turned daylighting on in parametric run #7, if 
> you’d like to compare that with the baseline. If anyone sees a quirk 
> in my model setup, or feels there’s some good reason that eQUEST would 
> give this result, I’d be happy to hear your thoughts. Thanks for your 
> time -
>
> Scott Hackel
>
> Project Manager
>
> LEED AP
>
> Energy Center of Wisconsin
>
> 455 Science Drive, Suite 200
>
> Madison, WI 53711
>
> 608.238.8276 x129
>
> _shackel at ecw.org_
>
> www.ecw.org
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Equest-users mailing list
> http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org
> To unsubscribe from this mailing list send  a blank message to EQUEST-USERS-UNSUBSCRIBE at ONEBUILDING.ORG
>