<font color="#000066"><font face="tahoma,sans-serif">Uday,</font></font><div><font color="#000066"><font face="tahoma,sans-serif"><br></font></font></div><div><font color="#000066"><font face="tahoma,sans-serif"><br></font></font></div>
<div><font color="#000066"><font face="tahoma,sans-serif">As far my limited knowledge goes, I don't know (or doubt!!??) if you can really model through the effectiveness on wet-bulb depression!! </font></font><span style="font-family:tahoma,sans-serif;color:rgb(0,0,102)">But you can control the Outside air and limit to enthalpy which might indirectly control your OA flow as well as effective. Select the system type as VAV and you've the preconditioner tab where you can put Add-On Evaporative cooling. </span><span style="font-family:tahoma,sans-serif;color:rgb(0,0,102)">I would open up the *.inp file and modify that.</span></div>
<div><font color="#000066"><font face="tahoma,sans-serif"><br></font></font></div><div><span style="font-family:tahoma,sans-serif;color:rgb(0,0,102)">Here is the part of the eQuest help -</span></div><div><h5>EVAP-CL-AIR</h5>
<p class="MsoBodyText">Fraction of the design supply air flow that passes through
the evaporative cooler for add-on units. Among other things, it is used to size
the evaporative cooler. </p>
<p class="MsoBodyText"><span style="color:rgb(0,0,102);font-family:tahoma,sans-serif">Hope more experienced folks would jump in to help you. There are my two cents!!</span></p><p class="MsoBodyText"><span style="color:rgb(0,0,102);font-family:tahoma,sans-serif"><br>
</span></p><p class="MsoBodyText"><span style="color:rgb(0,0,102);font-family:tahoma,sans-serif">Peace!</span></p><p class="MsoBodyText"><br></p><div class="gmail_quote">On Mon, May 14, 2012 at 9:31 PM, Uday Gorre <span dir="ltr"><<a href="mailto:u_k_gorre@ateindia.com" target="_blank">u_k_gorre@ateindia.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal"><font color="#1f497d" face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Thanks for your reply, But evaporative cooling efficiency in eQUEST mentioned as a function of flow only not on wet bulb depression (please find attached screen shot ). How can I model evaporative cooling<u></u><u></u></span></font></p>
<p class="MsoNormal"><font color="#1f497d" face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> effectiveness as a function of wet bulb depression.<u></u><u></u></span></font></p>
<p class="MsoNormal"><font color="#1f497d" face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></font></p><p class="MsoNormal"><font color="#1f497d" face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Thanks ®ards <u></u><u></u></span></font></p>
<p class="MsoNormal"><font color="#1f497d" face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></font></p><p class="MsoNormal"><font color="#1f497d" face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Uday Kumar<u></u><u></u></span></font></p>
<p class="MsoNormal"><font color="#1f497d" face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></font></p><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><font face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";font-weight:bold">From:</span></font></b><font face="Tahoma"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a> [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>] <b><span style="font-weight:bold">On Behalf Of </span></b>Arunabha Sau<br>
<b><span style="font-weight:bold">Sent:</span></b> 15 May 2012 2:12 AM<br><b><span style="font-weight:bold">To:</span></b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>
<b><span style="font-weight:bold">Subject:</span></b> Re: [Equest-users] Equest-users Digest, Vol 50, Issue 12<u></u><u></u></span></font></p></div><div><div class="h5"><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"><u></u> <u></u></span></font></p>
<p class="MsoNormal"><font size="3" color="#000066" face="Tahoma"><span style="font-size:12.0pt;font-family:"Tahoma","sans-serif";color:#000066">Uday,</span></font><u></u><u></u></p><div><p class="MsoNormal">
<font size="3" face="Times New Roman"><span style="font-size:12.0pt"><u></u> <u></u></span></font></p></div><div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"><u></u> <u></u></span></font></p>
</div><div><p class="MsoNormal"><font size="3" color="#000066" face="Tahoma"><span style="font-size:12.0pt;font-family:"Tahoma","sans-serif";color:#000066">Have you tried creating a new performance curve feeding the "Raw Data Points" from the Input Type dropdown menu? If not, I would say try to create the Curve formula from excel (putting your Wetbuld depression and the efficiency data and look up if it's Linear, quadratic, etc) then put those values at a, b & c at Performance Curve Properties window.</span></font><u></u><u></u></p>
</div><div><p class="MsoNormal"><font size="3" color="#000066" face="Tahoma"><span style="font-size:12.0pt;font-family:"Tahoma","sans-serif";color:#000066">The second method would, I guess, be more accurate.</span></font><u></u><u></u></p>
</div><div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"><u></u> <u></u></span></font></p></div><div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"><u></u> <u></u></span></font></p>
</div><div><p class="MsoNormal"><font size="3" color="#000066" face="Tahoma"><span style="font-size:12.0pt;font-family:"Tahoma","sans-serif";color:#000066">Hope it helps,</span></font><u></u><u></u></p>
</div><div><p class="MsoNormal"><font size="3" color="#000066" face="Tahoma"><span style="font-size:12.0pt;font-family:"Tahoma","sans-serif";color:#000066">Aru</span></font><u></u><u></u></p></div><div>
<p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"><u></u> <u></u></span></font></p></div><div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"><u></u> <u></u></span></font></p>
<div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">On Mon, May 14, 2012 at 1:01 PM, <<a href="mailto:equest-users-request@lists.onebuilding.org" target="_blank">equest-users-request@lists.onebuilding.org</a>> wrote:<u></u><u></u></span></font></p>
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<br>Today's Topics:<br><br> 1. User defined Indirect/Direct Evaporative cooling model<br> (Uday Gorre)<br> 2. OA-FROM-SYSTEM (Janne Kairento)<br><br><br>---------- Forwarded message ----------<br>From: "Uday Gorre" <<a href="mailto:u_k_gorre@ateindia.com" target="_blank">u_k_gorre@ateindia.com</a>><br>
To: <<a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a>><br>Cc: <br>Date: Mon, 14 May 2012 15:24:21 +0530<br>Subject: [Equest-users] User defined Indirect/Direct Evaporative cooling model<u></u><u></u></span></font></p>
<div><div><p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Dear eQUEST users,</span></font><u></u><u></u></p><p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span></font><u></u><u></u></p>
<p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">I am modeling a Indirect/Direct Evp.cooling model in eQUEST using user defined data.</span></font><u></u><u></u></p>
<p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span></font><u></u><u></u></p><p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">In my model please find attached excel sheet for effectiveness is a function of Wet bulb depression (Difference between Outdoor DBT and WBT). But as per my observation eQUEST provides to create user defined function for effectiveness based on flow (Find attached screen shot)only. Is there any possibility to define effectiveness based on wet bulb depression. And one more doubt is generally wet bulb depression is hourly changing based on weather data, so how it account in effectiveness and how zone entering minimum supply temperature (Find attached screen shot) effects with this change because generally this temperature is a function of effectiveness and Wet bulb Depression.</span></font><u></u><u></u></p>
<p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span></font><u></u><u></u></p><p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Can anybody please help me how to model a user defined model.</span></font><u></u><u></u></p>
<p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span></font><u></u><u></u></p><p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Thanks & Regards </span></font><u></u><u></u></p>
<p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span></font><u></u><u></u></p><p class="MsoNormal"><font face="Calibri"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Uday …..</span></font><u></u><u></u></p>
</div></div><p class="MsoNormal" style="margin-bottom:12.0pt"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"><br><br>---------- Forwarded message ----------<br>From: Janne Kairento <<a href="mailto:energymodelingftw@gmail.com" target="_blank">energymodelingftw@gmail.com</a>><br>
To: <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br>Cc: <br>Date: Mon, 14 May 2012 13:49:54 -0400<br>Subject: [Equest-users] OA-FROM-SYSTEM<br>Hello All,<br><br>
I'm currently trying to model a server room that that uses rack cooling as the first stage of cooling. There is a RTU that provides additional cooling and ventilation to the space. I modeled the server room to be conditioned by fan coils and zeroed out the fan energy and increased the coil head to account for the increased head across the racks. I moved the RTU to the top of the Systems section in the .inp and assigned the fan coil to get OA-FROM-SYSTEM. On the thermal zone level, I entered 50 cfm oa/person. My question is if the RTU provides 30% OA as a percentage of design flow, will my space get the OA and the additional airflow? Any help would be much appreciated!<br>
<br>-Joseph <br>_______________________________________________<br>Equest-users mailing list<br><a href="mailto:Equest-users@lists.onebuilding.org" target="_blank">Equest-users@lists.onebuilding.org</a><br><a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org" target="_blank">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a><u></u><u></u></span></font></p>
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</div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">-- <br></span></font><i><font color="black" face="Georgia"><span style="font-style:italic;font-size:10.0pt;font-family:"Georgia","serif"">Fightin' Texas Aggie Class of 2010</span></font></i><u></u><u></u></p>
<div><p class="MsoNormal"><i><font color="black" face="Georgia"><span style="font-style:italic;font-size:10.0pt;font-family:"Georgia","serif"">JU, Kolkata alumni 2005</span></font></i><u></u><u></u></p>
</div><p class="MsoNormal"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"><u></u> <u></u></span></font></p></div></div></div></div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><span style="border-collapse:collapse;font-family:arial,sans-serif;font-size:13px"><i><span><span style="font-size:10pt;font-family:Georgia,serif;color:black">Fightin'</span></span><span><span style="font-size:10pt;font-family:Georgia,serif;color:black"> </span></span><span><span style="font-size:10pt;font-family:Georgia,serif;color:black">Texas</span></span><span><span style="font-size:10pt;font-family:Georgia,serif;color:black"> </span></span><span><span style="font-size:10pt;font-family:Georgia,serif;color:black">Aggie Class of 2010</span></span></i></span><div>
<span style="border-collapse:collapse;font-family:arial,sans-serif;font-size:13px"><span><span style="font-size:10pt;font-family:Georgia,serif;color:black"><i>JU, Kolkata alumni 2005</i></span></span></span></div><br>
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