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<DIV></DIV><BR>At 2011-04-14 21:03:47£¬"Joe Fleming" <joe@thespinnakergroupinc.com> wrote:<BR>
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<P class="MsoNormal"><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Search DOAS in the user archives and you will find a <B>bunch</B> of discussions on this topic.<o:p></o:p></SPAN></P>
<P class="MsoNormal"><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class="MsoNormal"><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">First you need to be in detailed mode, for some reason the DOE engine (maybe just eQuest), doesn¡¯t have the skills to make a dedicated outdoor air system as a drop down selection. <o:p></o:p></SPAN></P>
<P class="MsoNormal"><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class="MsoNormal"><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Next, what is the supply air temperature entering the zones from the DOAS? Cold? Room temperature? Hot?<o:p></o:p></SPAN></P>
<P class="MsoNormal"><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">What is the process that the DOAS goes through to get the leaving air temperature at set-point?<o:p></o:p></SPAN></P>
<P class="MsoNormal"><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class="MsoNormal"><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Typically, you need to create a ¡°dummy space¡± and assign it to a ¡°dummy zone¡± then assign your first system to this zone. If you already created systems you can always open your .inp file and cut and paste the DOAS to the top of the systems list so that it will become your first system. Go ahead and assign all of the outside air to your DOAS ¡°dummy zone¡± and then choose outside air from system for all of the systems that this DOAS serves. It will only be able to find OA from systems above it on the component tree, so make sure your DOAS is at the top.<o:p></o:p></SPAN></P>
<P class="MsoNormal"><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class="MsoNormal"><B><SPAN style="FONT-SIZE: 11pt; COLOR: #74bd4b; FONT-FAMILY: 'Trebuchet MS','sans-serif'; mso-fareast-language: EN-US"><o:p> </o:p></SPAN></B></P>
<P class="MsoNormal"><B><SPAN style="FONT-SIZE: 10pt; COLOR: #74bd4b; FONT-FAMILY: 'Trebuchet MS','sans-serif'; mso-fareast-language: EN-US">Joe Fleming, E.I., LEED AP BD+C, BEMP<o:p></o:p></SPAN></B></P>
<P class="MsoNormal"><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN></P>
<P class="MsoNormal"><B><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'"> <A href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</A> [mailto:<A href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</A>] <B>On Behalf Of </B>tiejun hu<BR><B>Sent:</B> Thursday, April 14, 2011 1:11 AM<BR><B>To:</B> equest-users<BR><B>Subject:</B> [Equest-users] FC+DOAS<o:p></o:p></SPAN></P>
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<P class="MsoNormal">hi equesters<o:p></o:p></P></DIV>
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<P class="MsoNormal"> Dose anybody have experiences for FC+DOAS, in my modle, outdoor air processed by independent air-condition unit, then supplied to room directly, do not go through FC inlet. as far as i kown, outdoor air and return air combined process in FC in some countries,like below picture<IMG id="_x0000_i1025" height="362" src="cid:2a15191$1$12f543d1fe1$Coremail$hutiejun1223@126.com" width="600">but On the upper right corner,i see an outdoor air fan, is it an DOAS? if so ,how to realize it in equest? and how to set in the tab "OA FROM SYSTEM"?<o:p></o:p></P></DIV>
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<P class="MsoNormal"> any words will be appreciated!<o:p></o:p></P></DIV>
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<P class="MsoNormal"> yours sincere<o:p></o:p></P></DIV>
<P class="MsoNormal" style="MARGIN-BOTTOM: 12pt"><o:p> hi joe</o:p></P>
<P class="MsoNormal" style="MARGIN-BOTTOM: 12pt"><o:p> thanks for your reply,this is my Processing,<IMG src="cid:2cf207f0$2$12f543d1fe1$Coremail$hutiejun1223@126.com">, independent outdoor air from DOAS are processed to S( isenthalpic with room N£¬H:90%), then mixed with supply air from FC outnet(L), outdoor air doesn't undertake indoor load. Note that: my outdoor air do not get through FC, delivered to room derectly.</o:p></P>
<P class="MsoNormal" style="MARGIN-BOTTOM: 12pt"><o:p> i doubt that , as your method, Whether outdoor air from DOAS will be delivered to FC, flow through the fan in FC, then increase fan energy?</o:p></P>
<P class="MsoNormal" style="MARGIN-BOTTOM: 12pt"><o:p> thanks again!<BR></o:p></P></DIV></BLOCKQUOTE><br><br><span title="neteasefooter"><span id="netease_mail_footer"></span></span>