<div style="line-height:1.7;color:#000000;font-size:14px;font-family:arial"><DIV>I think I have known one of the reasons( if more than one).</DIV>
<DIV>I set a self-defined wall in the Wizard data edit mode, using the R value definition. However, the R value automatically became U value under Detailed data edit mode. So the roof heat conduction is very large. Besides, I set a ceiling in the second floor which exhaust the hot air out, so the roof conduction load in the second floor is zero. These settings caused the first floor load much larger than the second floor.<BR><BR></DIV>
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<DIV><BR></DIV>At 2012-02-27 01:32:12,RobertWichert <robert@wichert.org> wrote:<BR>
<BLOCKQUOTE style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" id="isReplyContent">Five to ten times? Check your occupancy carefully. It sounds like outside air to me. You either have no occupants on the second floor or ten times the occupants on the first floor.<BR><BR><BR><PRE class="moz-signature" cols="72">Robert Wichert P.Eng. LEED AP
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</PRE><BR>On 2/26/2012 4:42 AM, James Hansen wrote:
<BLOCKQUOTE cite="mid:CBDB673B-608B-4E70-8775-4920271A8F3D@ghtltd.com" type="cite">
<DIV>It's almost surely your first floor slab. The default configuration and U-value for these constructions are usually very poor.<BR><BR>-James</DIV>
<DIV><BR>On Feb 26, 2012, at 7:31 AM, "؛«ذا" <<A href="mailto:foolishstar@163.com" moz-do-not-send="true">foolishstar@163.com</A>> wrote:<BR><BR></DIV>
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<DIV style="LINE-HEIGHT: 1.7; FONT-FAMILY: arial; COLOR: #000000; FONT-SIZE: 14px">Hi, every body,
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<DIV>I now have a difficult problem. I found that the autosized design air flow in the first floor is much larger than the second floor, about 5-10 times of the second floor. I cannot figure out the reason, because the indoor lighting, equipment power and the occupant density are all the same for the two floors.</DIV>
<DIV>In my opinion, the second floor should have a higher air-conditioning load than the first floor because it is the building's top floor. But the result is just the opposite.</DIV>
<DIV>I really want to know the reason and how I should deal with it.</DIV>
<DIV>Thanks</DIV>
<DIV>Xing</DIV></DIV></DIV><BR><BR><SPAN title="neteasefooter"><SPAN id="netease_mail_footer"></SPAN></SPAN></DIV></BLOCKQUOTE>
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