<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:x="urn:schemas-microsoft-com:office:excel" xmlns:p="urn:schemas-microsoft-com:office:powerpoint" xmlns:a="urn:schemas-microsoft-com:office:access" xmlns:dt="uuid:C2F41010-65B3-11d1-A29F-00AA00C14882" xmlns:s="uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882" xmlns:rs="urn:schemas-microsoft-com:rowset" xmlns:z="#RowsetSchema" xmlns:b="urn:schemas-microsoft-com:office:publisher" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" xmlns:c="urn:schemas-microsoft-com:office:component:spreadsheet" xmlns:odc="urn:schemas-microsoft-com:office:odc" xmlns:oa="urn:schemas-microsoft-com:office:activation" xmlns:html="http://www.w3.org/TR/REC-html40" xmlns:q="http://schemas.xmlsoap.org/soap/envelope/" xmlns:rtc="http://microsoft.com/officenet/conferencing" xmlns:D="DAV:" xmlns:Repl="http://schemas.microsoft.com/repl/" xmlns:mt="http://schemas.microsoft.com/sharepoint/soap/meetings/" xmlns:x2="http://schemas.microsoft.com/office/excel/2003/xml" xmlns:ppda="http://www.passport.com/NameSpace.xsd" xmlns:ois="http://schemas.microsoft.com/sharepoint/soap/ois/" xmlns:dir="http://schemas.microsoft.com/sharepoint/soap/directory/" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:dsp="http://schemas.microsoft.com/sharepoint/dsp" xmlns:udc="http://schemas.microsoft.com/data/udc" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:sub="http://schemas.microsoft.com/sharepoint/soap/2002/1/alerts/" xmlns:ec="http://www.w3.org/2001/04/xmlenc#" xmlns:sp="http://schemas.microsoft.com/sharepoint/" xmlns:sps="http://schemas.microsoft.com/sharepoint/soap/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:udcs="http://schemas.microsoft.com/data/udc/soap" xmlns:udcxf="http://schemas.microsoft.com/data/udc/xmlfile" xmlns:udcp2p="http://schemas.microsoft.com/data/udc/parttopart" xmlns:st="" xmlns="http://www.w3.org/TR/REC-html40"
xmlns:ns0="http://schemas.microsoft.com/sharepoint/soap/workflow/"
xmlns:ns1="http://schemas.microsoft.com/office/2006/digsig-setup"
xmlns:ns2="http://schemas.microsoft.com/office/2006/digsig"
xmlns:ns3="http://schemas.openxmlformats.org/package/2006/digital-signature"
xmlns:ns4="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:ns5="http://schemas.microsoft.com/office/2004/12/omml"
xmlns:ns6="http://schemas.openxmlformats.org/package/2006/relationships"
xmlns:ns7="http://microsoft.com/sharepoint/webpartpages"
xmlns:ns8="http://schemas.microsoft.com/exchange/services/2006/types"
xmlns:ns9="http://schemas.microsoft.com/exchange/services/2006/messages"
xmlns:ns10="http://schemas.microsoft.com/sharepoint/soap/SlideLibrary/"
xmlns:ns11="http://microsoft.com/webservices/SharePointPortalServer/PublishedLinksService"
xmlns:ns12="urn:schemas-microsoft-com:">
<head>
<meta http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<meta name=Generator content="Microsoft Word 11 (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>
<!--a:link
{mso-style-priority:99;}
span.MSOHYPERLINK
{mso-style-priority:99;}
a:visited
{mso-style-priority:99;}
span.MSOHYPERLINKFOLLOWED
{mso-style-priority:99;}
p.MSOACETATE
{mso-style-priority:99;}
li.MSOACETATE
{mso-style-priority:99;}
div.MSOACETATE
{mso-style-priority:99;}
span.BALLOONTEXTCHAR
{mso-style-priority:99;}
/* Font Definitions */
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Garamond;
panose-1:2 2 4 4 3 3 1 1 8 3;}
@font-face
{font-family:Webdings;
panose-1:5 3 1 2 1 5 9 6 7 3;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:Calibri;}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{margin:0in;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:Tahoma;}
span.BalloonTextChar
{font-family:Tahoma;}
span.EmailStyle20
{mso-style-type:personal;
font-family:Calibri;
color:windowtext;}
span.EmailStyle21
{mso-style-type:personal-reply;
font-family:Arial;
color:navy;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.Section1
{page:Section1;}
/* List Definitions */
@list l0
{mso-list-id:1149251184;
mso-list-type:hybrid;
mso-list-template-ids:1409590288 67698703 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;}
@list l0:level1
{mso-level-tab-stop:.5in;
mso-level-number-position:left;
text-indent:-.25in;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
-->
</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=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hello Vikram,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>This is how we modeled gas-fired desiccant
units serving multiple AHUs in a storage building with <i><span
style='font-style:italic'>very</span></i> tight conditioning tolerances.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<ol style='margin-top:0in' start=1 type=1>
<li class=MsoNormal style='color:navy;margin-bottom:6.0pt;mso-list:l0 level1 lfo1'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:
Arial'>If you have a fresh air (FA) section to pre-cool the air, make a
single-zone AHU that is controlled to maintain the discharge temperatures
you want. Note that the DAT has a lower limit of around 40°F or so. Set
the design airflow rate to be whatever you need for ventilation air, force
the unit to be 100% OA.<o:p></o:p></span></font></li>
<li class=MsoNormal style='color:navy;margin-bottom:6.0pt;mso-list:l0 level1 lfo1'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:
Arial'>Create a “FA ghost zone”, and make the space
temperature setpoints be the desired FA discharge setpoints. Don’t
put any lights, people, etc in the space. <o:p></o:p></span></font></li>
<li class=MsoNormal style='color:navy;margin-bottom:6.0pt;mso-list:l0 level1 lfo1'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:
Arial'>Make a second single zone AHU that will be your desiccant section,
for now let’s call it DD system. You need to set up the ‘outside
air from system’ as the FA system, set the ventilation airflow rate
as what you need to pass through the DD.<o:p></o:p></span></font></li>
<li class=MsoNormal style='color:navy;margin-bottom:6.0pt;mso-list:l0 level1 lfo1'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:
Arial'>Create a “DD ghost zone” that has temperature setpoints
typical of the discharge temperature from your desiccant section. <o:p></o:p></span></font></li>
<li class=MsoNormal style='color:navy;mso-list:l0 level1 lfo1'><font size=2
color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial'>Create
the AHUs that are actually in the design, include their heating and
cooling coils and any humidification equipment – this is
straightforward. Outside air needs to come from the DD system.<o:p></o:p></span></font></li>
</ol>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>This approach can accurately predict gas
use for regeneration, cooling for the FA and AHU units, and heating in the FA
and AHU units when the DD section is turned off. The tricky thing about this approach
is that you need to select the DD discharge temperature to be representative of
the typical operating point during the dehumidification season since DD
discharge temp varies with the degree of dehumidification. An alternate
approach (which we have not tried) would be to make 365 day schedules based
upon your weather file and use a user-defined function to calculate the DD
ghost zone space temp setpoints based on the humidity entering the DD unit. This
function would need to be based on detailed information from Munters. Wouldn’t
it be great if you could make user defined functions that directly relate to hourly
information in the weather file? <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Eric<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 color=navy face=Calibri><span style='font-size:
10.0pt;color:navy'>Ph: (781) 431-1100 ext 12<br>
Fax: (781) 431-1109</span></font><font color=navy><span
style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Calibri><span style='font-size:
11.0pt;color:navy'> </span></font><o:p></o:p></p>
</div>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Vikram Sami<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, February 01, 2010
4:58 PM<br>
<b><span style='font-weight:bold'>To:</span></b>
equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Equest-users] Desiccant
Wheel</span></font><font size=3 face="Times New Roman"><span style='font-size:
12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><img
width=491 height=471 id="Picture_x005f_x0020_1"
src="cid:image002.gif@01CAA8A0.FB55FA30"><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>I’m
trying to model a Munters packaged desiccant unit (diagram above) that
uses a heat pump to operate both sides of the wheel (heating side for the
desiccant recharge and cooling side for pre-cool). Is it possible to model this
in eQUEST? If so – how? <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><font
size=3 color=black face=Garamond><span style='font-size:12.0pt;font-family:
Garamond;color:black;font-weight:bold'>Vikram Sami,</span></font></b><font
size=3 face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'>
</span></font><font size=3 color=black face=Garamond><span style='font-size:
12.0pt;font-family:Garamond;color:black'>LEED AP</span></font><font size=3
face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'>
<br>
</span></font><font size=3 color=black face=Garamond><span style='font-size:
12.0pt;font-family:Garamond;color:black'>Direct Phone 404-253-1466 | Direct Fax
404-253-1366</span></font><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-family:"Times New Roman"'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><font
size=3 color=maroon face=Garamond><span style='font-size:12.0pt;font-family:
Garamond;color:maroon;font-weight:bold'>L</span></font></b><b><font size=2
color=maroon face=Garamond><span style='font-size:10.0pt;font-family:Garamond;
color:maroon;font-weight:bold'>ORD</span></font></b><b><font size=3
color=maroon face=Garamond><span style='font-size:12.0pt;font-family:Garamond;
color:maroon;font-weight:bold'>, A</span></font></b><b><font size=2
color=maroon face=Garamond><span style='font-size:10.0pt;font-family:Garamond;
color:maroon;font-weight:bold'>ECK</span></font></b><b><font size=3
color=maroon face=Garamond><span style='font-size:12.0pt;font-family:Garamond;
color:maroon;font-weight:bold'> & S</span></font></b><b><font size=2
color=maroon face=Garamond><span style='font-size:10.0pt;font-family:Garamond;
color:maroon;font-weight:bold'>ARGENT</span></font></b><b><font size=3
color=maroon face=Garamond><span style='font-size:12.0pt;font-family:Garamond;
color:maroon;font-weight:bold'> A</span></font></b><b><font size=2
color=maroon face=Garamond><span style='font-size:10.0pt;font-family:Garamond;
color:maroon;font-weight:bold'>RCHITECTURE</span></font></b><b><font size=3
face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman";
font-weight:bold'><br>
</span></font></b><font size=2 face=Garamond><span style='font-size:10.0pt;
font-family:Garamond'>1201 Peachtree Street NE, Suite 300, Atlanta, GA 30361</span></font><font
size=3 face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'>
<br>
</span></font><font size=2 face=Garamond><span style='font-size:10.0pt;
font-family:Garamond'>Responsive Design</span></font><font size=3
face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'>
</span></font><font size=1 face=Symbol><span style='font-size:7.5pt;font-family:
Symbol'>·</span></font><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-family:"Times New Roman"'> </span></font><font
size=2 face=Garamond><span style='font-size:10.0pt;font-family:Garamond'>Technological
Expertise</span></font><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-family:"Times New Roman"'> </span></font><font
size=1 face=Symbol><span style='font-size:7.5pt;font-family:Symbol'>·</span></font><font
size=3 face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'>
</span></font><font size=2 face=Garamond><span style='font-size:10.0pt;
font-family:Garamond'>Exceptional Service</span></font><font size=3
face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'>
<br>
</span></font><font size=2 color="#007f00" face=Garamond><span
style='font-size:10.0pt;font-family:Garamond;color:#007F00'>Please visit our
new website</span></font><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-family:"Times New Roman"'> </span></font><font
size=3 color=black face=Garamond><span style='font-size:12.0pt;font-family:
Garamond;color:black'>|</span></font><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-family:"Times New Roman"'> <a
href="file:///\\www.lordaecksargent.com\"><font size=2 face=Garamond><span
style='font-size:10.0pt;font-family:Garamond'>www.lordaecksargent.com</span></font></a><o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=6 color="#007f00" face=Webdings><span style='font-size:24.0pt;font-family:
Webdings;color:#007F00'>P </span></font><font size=2 color="#007f00"
face=Garamond><span style='font-size:10.0pt;font-family:Garamond;color:#007F00'>Think
GREEN before you print.</span></font><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
</div>
</body>
</html>