<div>Thanks, Michael.</div> <div> </div> <div>I did try the steps according to your suggestions. But I found the following issues.</div> <div> </div> <div>In my model (detail model), I did not install the preheat coil. After I install the preheat coil, I found that no matter how I increase the capacity, the heating energy use for preheat coil is very small. I also tried to put design day data into the detail mdel, it igave me the same result too.</div> <div> </div> <div>Based on my understanding, the zone level reheat coils are for space heating load through building envelpe and infiltration; the main system heat coil is to handle ventilation heating load. The preheat coil is just to preheat incoming air to prevent frost.</div> <div> </div> <div>So I dont understan why the heat and preheat coil heeat energy use is so small in the very cold climate (zone 7). In my model, the heat recovery was not installed and the space type is regular
office.</div> <div> </div> <div>Any suggestion is greatly appreciated.</div> <div> </div> <div>Thanks.</div> <div> </div> <div>Regards,</div> <div> </div> <div>David<BR><BR><B><I>Michael Andelman <mike@andelmanlelek.com></I></B> wrote:</div> <BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">From: "Michael Andelman" <mike@andelmanlelek.com><BR>To: <tianzhen9@yahoo.com><BR>Subject: RE: [BLDG-SIM] eQUEST-System no heating<BR>Date: Thu, 23 Aug 2007 10:21:34 -0400<BR><BR> <META content="Microsoft Word 11 (filtered medium)" name=Generator> <STYLE> v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} </STYLE> <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:SmartTagType name="place"
namespaceuri="urn:schemas-microsoft-com:office:smarttags"></o:SmartTagType><o:SmartTagType name="State" namespaceuri="urn:schemas-microsoft-com:office:smarttags"></o:SmartTagType><o:SmartTagType name="time" namespaceuri="urn:schemas-microsoft-com:office:smarttags"></o:SmartTagType><o:SmartTagType name="date" namespaceuri="urn:schemas-microsoft-com:office:smarttags"></o:SmartTagType><o:SmartTagType name="PersonName" namespaceuri="urn:schemas-microsoft-com:office:smarttags"></o:SmartTagType> <STYLE> st1\:*{behavior:url(#default#ieooui) } </STYLE> <STYLE> <!-- /* Font Definitions */ @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:12.0pt; font-family:"Times New Roman";} a:link, span.MsoHyperlink {color:blue; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {color:blue; text-decoration:underline;} p
{mso-margin-top-alt:auto; margin-right:0in; mso-margin-bottom-alt:auto; margin-left:0in; font-size:12.0pt; font-family:"Times New Roman";} span.EmailStyle19 {mso-style-type:personal-reply; font-family:Arial; color:navy;} @page Section1 {size:8.5in 11.0in; margin:1.0in 1.25in 1.0in 1.25in;} div.Section1 {page:Section1;} --> </STYLE> <DIV class=Section1> <div class=MsoNormal><FONT face=Arial color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">If you do not assign a capacity for the preheat coil, it is self sized based on heating design day information (not the outside temperature from the weather file).<o:p></o:p></SPAN></FONT></div> <div class=MsoNormal><FONT face=Arial color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">The wizard creates a HDD for <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:State w:st="on"><st1:place
w:st="on">California</st1:place></st1:State> ¡V you need to change the HDD outdoor temperature or enter a coil capacity.<o:p></o:p></SPAN></FONT></div> <div class=MsoNormal><FONT face=Arial color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></div> <div class=MsoNormal><FONT face=Arial color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Mike<o:p></o:p></SPAN></FONT></div> <div class=MsoNormal><FONT face=Arial color=navy size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></div> <DIV> <DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <HR tabIndex=-1 align=center width="100%" SIZE=2> </SPAN></FONT></DIV> <div class=MsoNormal><B><FONT face=Tahoma size=2><SPAN style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> BLDG-SIM@gard.com [mailto:BLDG-SIM@gard.com] <B><SPAN style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Zhen Tian<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Wednesday, <st1:date w:st="on" ls="trans" Month="8" Day="22" Year="2007">August 22, 2007</st1:date> <st1:time w:st="on" Hour="15" Minute="09">3:09 PM</st1:time><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> BLDG-SIM@gard.com<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [BLDG-SIM] eQUEST-System no heating</SPAN></FONT><o:p></o:p></div></DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></div> <DIV> <div class=MsoNormal><FONT face=Arial size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">Hi Aulbach,</SPAN></FONT><o:p></o:p></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE:
12pt"> <o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face=Arial size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">Thanks for your reply. Yes, I inpu everything into the detail mode. Based on the system design in climate. The air system has three typies of heating: 1) preheating for preheating the incoming air to around 5 degree C; 2) main system heating coil to heat the incoming air (this heat coil is arranged after cooling coil); 3) reheat coil, this is the reheat coil in zone level to meet the zone temperature requirement.</SPAN></FONT><o:p></o:p></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face=Arial size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">The one I found is the 2) main system heating coil never works. In the model, the
preheating coil was ignored. Seems that all heating load goes to the zone level reheat coil.</SPAN></FONT><o:p></o:p></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face=Arial size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">Any idea about this?</SPAN></FONT><o:p></o:p></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face=Arial size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">Thanks.</SPAN></FONT><o:p></o:p></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face=Arial size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY:
Arial">Regards,</SPAN></FONT><o:p></o:p></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face=Arial size=3><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: Arial">David </SPAN></FONT><o:p></o:p></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"><BR><BR><EM><B><I><FONT face="Times New Roman"><SPAN style="FONT-WEIGHT: bold">"Aulbach, John" <<st1:PersonName w:st="on">jaulbach@nexant.com</st1:PersonName>></SPAN></FONT></I></B></EM> wrote:<o:p></o:p></SPAN></FONT></div></DIV> <BLOCKQUOTE style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: medium none; MARGIN-TOP: 5pt; PADDING-LEFT: 4pt; MARGIN-BOTTOM: 5pt; PADDING-BOTTOM: 0in; MARGIN-LEFT: 3.75pt; BORDER-LEFT: #1010ff 1.5pt solid; PADDING-TOP: 0in; BORDER-BOTTOM: medium none"> <div class=MsoNormal><FONT
face=Arial color=blue size=2><SPAN style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">I am going to take a stab at this one. In eQuest, a VAV system is a Terminal System. Therefore, in the Wizard, the zone level is where all heating and/or reheating is done (and developed). You have to force a primary heating source to occur, but this doesn't appear in the Wizard mode, apparently..</SPAN></FONT><o:p></o:p></div> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div> <div class=MsoNormal><FONT face=Arial color=blue size=2><SPAN style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Have you input a Reheat-Delta-T? The temperature of 55 DegF + 40 DegF = 95 DegF heating supply temp.</SPAN></FONT><o:p></o:p></div> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div> <div class=MsoNormal><FONT face=Arial color=blue
size=2><SPAN style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">I also do NOT find the ability to create a pre heat coil in the Wizard. I have done it, but am quite sure this was input in the Detailed Interface Mode. There are MANY eQuest features that become available (like more SYSTEM-TYPES) in the Detailed Mode.</SPAN></FONT><o:p></o:p></div> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div> <div class=MsoNormal><FONT face=Arial color=blue size=2><SPAN style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Once you have "cookie cuttered" your building in the Wizards, switch to the Detailed Mode. There you will find your preheat coil.</SPAN></FONT><o:p></o:p></div> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></div> <DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT face="Times New Roman"
size=3><SPAN style="FONT-SIZE: 12pt"> <HR tabIndex=-1 align=center width="100%" SIZE=2> </SPAN></FONT></DIV> <div class=MsoNormal style="MARGIN-BOTTOM: 12pt"><B><FONT face=Tahoma size=2><SPAN style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> BLDG-SIM@gard.com [mailto:BLDG-SIM@gard.com] <B><SPAN style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Zhen Tian<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Wednesday, <st1:date w:st="on" ls="trans" Month="8" Day="22" Year="2007">August 22, 2007</st1:date> <st1:time w:st="on" Hour="9" Minute="49">9:49 AM</st1:time><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> BLDG-SIM@gard.com<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [BLDG-SIM] eQUEST-System no heating</SPAN></FONT><o:p></o:p></div> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Dear
All,<o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">I experienced an issue when I use eQUEST. I model a building in cold climate with VAV system. In the wizard mode, I found the system heat source is "not installed". But when I change to electricity, I found the heating enery use for system heating is zero. I also tried other options, always found that the system heat source is useless. I found that all the heating goes the zone level. Based on my understanding, this should not be the real case.<o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">I set the air supply temperature as constant as 55F (around 13 degree C), zone entering max air tem as 95F. Enen I set the zone entering max air tem as 86 (30 C). The system heating coil still has no load.<o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Has anyone experience the same problem before and know to to solve this problem?<o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Thanks a lot.<o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Regards,<o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></div></DIV> <DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">David<o:p></o:p></SPAN></FONT></div></DIV> <DIV> <DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt"> <HR align=center width="100%" SIZE=1> </SPAN></FONT></DIV> <div class=MsoNormal><FONT face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">Ready for the edge of your seat? <A href="http://us.rd.yahoo.com/evt=48220/*http:/tv.yahoo.com/">Check out tonight's top picks</A> on Yahoo! TV. <o:p></o:p></SPAN></FONT></div></DIV> <div class=MsoNormal><FONT
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