<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Balloon Text Char";
margin:0in;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.BalloonTextChar
{mso-style-name:"Balloon Text Char";
mso-style-priority:99;
mso-style-link:"Balloon Text";
font-family:"Tahoma","sans-serif";}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Dear All,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>We are modelling a building having different zones – conditioned, and underroof zones. The building is equipped with DX system for <b>cooling </b>only. The conditioned zone is connected to the underroof by <b>air wall construction.<o:p></o:p></b></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>The detailed output file, Report LS-B (Space peak load components) of <b>conditioned zone, </b>shows <b>Roof Conduction = 0.0 kW. </b></span><span style='font-family:"Arial","sans-serif"'>It is noticed that value of <b>conduction</b> <b>load</b> <b>through the roof </b>appears for the zone – <b>underroof</b></span><span style='font-family:"Arial","sans-serif"'>. The <b>day/time</b> at which peak cooling loads are different for both the zones.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>The screenshots are as follows:<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><b><u><span style='font-family:"Arial","sans-serif"'>Conditioned zone</span></u></b><b><span style='font-family:"Arial","sans-serif"'> <u>Underroof zone</u><i> (Roof absorptivity = 0.7)</i><u><o:p></o:p></u></span></b></p><p class=MsoNormal><b><u><span style='font-family:"Arial","sans-serif"'><o:p><span style='text-decoration:none'> </span></o:p></span></u></b></p><p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'><img width=598 height=559 id="Picture_x0020_3" src="cid:image004.jpg@01D0C18D.DBE03D80"></span></b><b><span style='font-family:"Arial","sans-serif"'> </span></b><span style='font-family:"Arial","sans-serif"'> <img width=587 height=555 id="Picture_x0020_4" src="cid:image005.jpg@01D0C18D.DBE03D80"></span><b><span style='font-family:"Arial","sans-serif"'><o:p></o:p></span></b></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'>Query: <o:p></o:p></span></b></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>It is noticed that <b>DX system total capacity </b>reduces if roof with <b>lower absorptivity (0.2 as against 0.7)</b> is given as input. But the conditioned zone <b>peak cooling load </b>remains the same i.e. <b>161.682 kW.</b> <o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Why does the <b>peak cooling load </b>remains same even if <b>low absorptivity</b> <b>roof</b> is used ? <o:p></o:p></span></p><p class=MsoNormal><b><span style='font-family:"Arial","sans-serif"'> </span></b><span style='font-family:"Arial","sans-serif"'> <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks !!!<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Regards,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Prasad </span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>