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<div class="moz-cite-prefix">Dante,<br>
<br>
How are you modeling the two types of windows in eQUEST and
EnergyPlus? If you're using the Simple Window Model in both
programs, the difference may be due to different assumptions about
the solar heat characteristics in their Simple Window Models.
Without seeing the inputs, I can only guess, but it looks like
with EnergyPlus the only change is in the U-value, which as you
say has a small effect due to the small delta Ts, but with eQUEST,
there may also be changes in the solar heat gain, which would also
impact the building energy use.<br>
<br>
Joe<br>
<br>
Joe Huang <br>
White Box Technologies, Inc.<br>
346 Rheem Blvd., Suite 108D<br>
Moraga CA 94556<br>
<a class="moz-txt-link-abbreviated"
href="mailto:yjhuang@whiteboxtechnologies.com">yjhuang@whiteboxtechnologies.com</a><br>
<a class="moz-txt-link-freetext"
href="http://weather.whiteboxtechnologies.com">http://weather.whiteboxtechnologies.com</a><br>
<a class="moz-txt-link-freetext"
href="http://www.whiteboxtechnologies.com">http://www.whiteboxtechnologies.com</a><br>
(o) (925)388-0265<br>
(c) (510)928-2683<br>
"building energy simulations at your fingertips"<br>
<br>
On 5/22/2013 9:33 AM, Dante Garcia wrote:<br>
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<p class="MsoNormal"><span lang="EN-US">Hi all,</span></p>
<p class="MsoNormal"><span lang="EN-US">I am new using eQuest, I
made a model in the DDWizard.</span></p>
<p class="MsoNormal"><span lang="EN-US">When I use a high
performance glass U-value = 0.31, I got less efficiency than
when I modeled using an U-value =0.70, and the difference is
about 4%, using enegyPlus, that is the program that I have
been using for a year show me differences in less than 0.5%
selecting diferents U-value because the range of
temperatures is between 15-29 in a whole year in my country)</span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US">PDta: This is my first
model using eQuest (I have another model that a friend gave
me, I change the wheater and model with both performance of
glasses and I got same result, So, I think that the problem
is in my model)</span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US">Someone ran into with
this problem?</span></p>
<p class="MsoNormal"><span lang="EN-US">Any help will be
appreciate,</span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span lang="EN-US">I have been using the
sim file to figure out the problem but I could not find
indoor temperatures in each space.</span></p>
<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><b><span lang="ES">Dante Garcia
</span></b></p>
<p class="MsoNormal"><b><span lang="ES">LEED Green Associate</span></b></p>
<p class="MsoNormal"><b><span lang="ES"> </span></b></p>
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