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<p class=MsoNormal><span style='color:#1F497D'>Ganesh,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>I think this is the setup you're
talking about:<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Baseline - VAV AHU, Chilled water
cooling coil, no evaporative cooling<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Energy Conservation Measure - VAV
AHU, Chilled water cooling coil with direct evaporative cooler.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>When you say that the return air
would be cooled by the cooling coil, do you mean that there will be some form
of heat recovery, or just that the air handler is equipped with an economizer
and can recirculate return air? It may be helpful to attach a rough
sketch of the proposed system schematics.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>In any case, see the screenshot
& help file excerpts below:<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><img width=927 height=511
id="Picture_x0020_2" src="cid:image002.jpg@01CB0C67.E5604ED0"></span><span
style='color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='font-size:10.0pt;font-family:"Times New Roman","serif"'>EVAP-CL-TYPE<o:p></o:p></span></b></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'>For SYSTEM:TYPE
= EVAP-COOL or for an add-on unit, takes a code-word that specifies the type of
evaporative cooling elements. See <a href="JavaScript:TL_7392.HHClick()">Figure
38</a>.<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'>DIRECT
There is only a direct evaporative cooling element.<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'>INDIRECT
There is only an indirect evaporative cooling element.<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'>INDIRECT-DIRECT
There are both direct and indirect evaporative cooling elements.<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='font-size:10.0pt;font-family:"Times New Roman","serif"'>EVAP-CL+M-SUP<o:p></o:p></span></b></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Takes a
code-word that specifies whether the evaporative precooler can or cannot
operate in conjunction with mechanical cooling. In either case the evaporative
cooler will cycle off if OA-CONTROL = TEMP and the outside air is cool enough
to handle the entire cooling load.<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'>SEPARATE
The evaporative cooler operates only when it meets the entire cooling load.<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'>TOGETHER
The evaporative cooler does as much cooling as possible; mechanical cooling
handles the remaining load (plus any dehumidification that is needed).<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'>You should also
have a look at the help files, search under EVAP.<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Steven<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
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<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>R
Ganesh<br>
<b>Sent:</b> Monday, June 14, 2010 11:30 PM<br>
<b>To:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> [Equest-users] Cooling coil and Direct Evaporative Cooler<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-GB>Hello All,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>I am interested in calculating the energy
savings obtained by using combination of chilled water cooling coil and direct
evaporative cooler when compared to using only the cooling coil for a dry
climate. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB>In this set up the direct evaporative
cooler would be placed after the cooling coil. The return air would be cooled
by cooling coil and then passes through the direct evaporative cooler and then
to the respective zone.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-GB> I would like to have some suggestion
on how to model this in eQuest.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
<p class=MsoNormal>Regards,<o:p></o:p></p>
<p class=MsoNormal>Ganesh <o:p></o:p></p>
<p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p>
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