[Equest-users] U-Value unexpected impact

[Christopher Schaffner]

In mild weather, with high internal heat gains, the losses through the
glazing reduce the cooling load. In this situation, increasing the
performance of the glass will cause increased energy consumption.

This counterintuitive result is often the result of an overestimation of
internal heat gains.   You should perform a reality check on your internal
heat gains, before you determine if this result is correct.

--

Chris Schaffner, PE
LEED Fellow
Founder and Principal

The Green Engineer, LLP
Sustainable Design Consulting
50 Beharrell Street
Concord, MA 01742
T: 978.369.8978
M:978.844.1464
chris at greenengineer.com
www.greenengineer.com

The Green Engineer, LLP is a Certified B Corporation

From:  Omar Osama <o_osama at live.com>
Date:  Thu, 13 Oct 2011 16:07:13 +0200
To:  <equest-users at lists.onebuilding.org>
Subject:  [Equest-users] U-Value unexpected impact

All,
    I'am modelling a mid-rise, curtain wall, office building in Egypt (hot
humid climate 2a). while I do decrease the glazing's U-value, below 0.5, the
energy consumption tends to increase. does this issue have a reality related
explanation, is it a problem in my file, or is it a software bug issue?


Thanks for consideration,

Omar AlRawi
Project Engineer ,  EA Sustainable Building Consultants
www.ea-buildingconsultants.com <http://www.ea-buildingconsultants.com/>
       
_______________________________________________ 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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20111013/23577b58/attachment-0002.htm>