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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:#1F497D'>Could be a handful of factors but most of the control of the main heating coil with be the zone entering air temp/hot deck leaving temp input. Play with those numbers to match what the design should be and you should be able to get the results you are targeting.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-family:"Segoe UI","sans-serif";color:#C75B12'>William Mak, LEED AP BD+C</span></b><span style='font-size:9.0pt;font-family:"Segoe UI","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Segoe UI","sans-serif";color:black'>Mechanical Design Engineer</span><span style='font-size:9.0pt;font-family:"Segoe UI","sans-serif";color:black'><br></span><span style='font-size:9.0pt;font-family:"Segoe UI","sans-serif";color:#1F497D'><br></span><b><span style='font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:#C75B12'>EPSTEIN</span></b><span style='font-size:9.0pt;font-family:"Segoe UI","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Segoe UI","sans-serif";color:black'>Architecture<br></span><span style='font-size:8.0pt;font-family:"Segoe UI","sans-serif";color:#C75B12'>Interiors</span><span style='font-size:8.0pt;font-family:"Segoe UI","sans-serif";color:black'><br>Engineering<br></span><span style='font-size:8.0pt;font-family:"Segoe UI","sans-serif";color:#C75B12'>Construction</span><span style='font-size:8.0pt;font-family:"Segoe UI","sans-serif";color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Segoe UI","sans-serif";color:black'>Sustainability<br><br>600 West Fulton Street<br>Chicago, Illinois 60661-1259<br><br>D: (312) 429-8116<br>F: (312) 429-8800</span><span style='font-size:8.0pt;font-family:"Segoe UI","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Segoe UI","sans-serif";color:black'>E:</span><span style='font-size:8.0pt;font-family:"Segoe UI","sans-serif";color:#0070C0'> <a href="mailto:wmak@epsteinglobal.com">wmak@epsteinglobal.com</a></span><span style='font-size:8.0pt;font-family:"Segoe UI","sans-serif";color:black'><br>W:</span><span style='font-size:8.0pt;font-family:"Segoe UI","sans-serif";color:#C75B12'> <a href="http://www.epsteinglobal.com/"><span style='color:#C75B12'>www.epsteinglobal.com</span></a></span><span style='font-size:9.0pt;font-family:"Segoe UI","sans-serif";color:black'><br><br></span><span style='font-size:10.0pt;font-family:Webdings;color:#00B050'>þ</span><span style='font-size:8.0pt;font-family:"Segoe UI","sans-serif";color:black'> Epstein is a firm believer in sustainability. We ask that you please consider the environment before printing this e-mail.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Segoe UI","sans-serif";color:#1F497D'><o:p> </o:p></span></p><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"'> DongEun Kim [mailto:equested@gmail.com] <br><b>Sent:</b> Tuesday, June 28, 2011 12:31 AM<br><b>To:</b> John Aulbach<br><b>Cc:</b> Will Mak; equest-users@lists.onebuilding.org<br><b>Subject:</b> Re: [Equest-users] VAV with Electric Reheat<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Dear Will,<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>Thank you for your help on this!!<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>The result was exactly as you mention below.<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>But, why can't main heating coil work to meet the zone heating load if the reheating coil does not work ? <o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>~DE<o:p></o:p></p></div><div><p class=MsoNormal>2011/6/28 John Aulbach <<a href="mailto:jra_sac@yahoo.com">jra_sac@yahoo.com</a>><o:p></o:p></p><div><div><p class=MsoNormal>Sorry, Dong, if I did not interpret your question correctly. If you have a VAV system with reheat, you will ALWAYS have the reheat available, even if just in a space heating sense (in winter months). <br><br>You cannot change SYSTEM types in eQuest by Season. You are stuck with reheat (especially if electric). But IF you had Hot Water reheat, you COULD schedule your boiler off when you don't want the rehat to work.<br><br>Result? Your SYSTEM will try to reheat cold zones, and be unable to. You will get zones whose load you cannot meet as the power behind the reheat isn't there.<br><br>The DOE-2.2 engine behind eQuest combined the old SYSTEM and PLANT into HVAC. NOW, if your plant does not have the capability to heat or cool, space temperatures will rise. That wasmn't true in DOE-2.1E.<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><div><div class=MsoNormal align=center style='text-align:center'><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><hr size=1 width="100%" align=center></span></div><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"'> DongEun Kim <<a href="mailto:equested@gmail.com" target="_blank">equested@gmail.com</a>><o:p></o:p></span></p></div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>To:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> John Aulbach <<a href="mailto:jra_sac@yahoo.com" target="_blank">jra_sac@yahoo.com</a>><br><b>Cc:</b> Will Mak <<a href="mailto:wmak@epsteinglobal.com" target="_blank">wmak@epsteinglobal.com</a>>; <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br><b>Sent:</b> Mon, June 27, 2011 6:06:41 PM <o:p></o:p></span></p><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><br><b>Subject:</b> Re: [Equest-users] VAV with Electric Reheat<o:p></o:p></span></p></div></div><div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Let me re-direct my question regarding reheating:<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>How do I make my reheating (electric) work only(mainly) for cooling mode? <o:p></o:p></p></div><div><p class=MsoNormal>~DE<o:p></o:p></p></div><div><p class=MsoNormal>2011/6/27 John Aulbach <<a href="mailto:jra_sac@yahoo.com" target="_blank">jra_sac@yahoo.com</a>><o:p></o:p></p><div><div><p class=MsoNormal>DongEun:<br><br>There is no difference, except to make the secondary heating coil ELECTRIC. No problem in eQuest.<br><br>John Aulbach<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><div class=MsoNormal align=center style='text-align:center'><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><hr size=1 width="100%" align=center></span></div><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"'> DongEun Kim <<a href="mailto:equested@gmail.com" target="_blank">equested@gmail.com</a>><br><b>To:</b> Will Mak <<a href="mailto:wmak@epsteinglobal.com" target="_blank">wmak@epsteinglobal.com</a>><br><b>Cc:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br><b>Sent:</b> Sun, June 26, 2011 9:19:02 PM<br><b>Subject:</b> Re: [Equest-users] VAV with Electric Reheat</span><o:p></o:p></p><div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Will,<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>If I understand correctly, reheat Delta T, which was to specify max reheat coil capacity.<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>What I want is to switch reheat source from 'how water' to 'ectricity', while the heating source for <o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>the main heating coil is 'how water.'<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>Thank you.<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>~DE<o:p></o:p></p></div><div><p class=MsoNormal>2011/6/24 Will Mak <<a href="mailto:wmak@epsteinglobal.com" target="_blank">wmak@epsteinglobal.com</a>><o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;color:#1F497D'>You have to put a value for the reheat delta T or the reheat coils don’t kick on.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='color:#C75B12'>William Mak, LEED AP BD+C</span></b><span style='font-size:9.0pt;color:#1F497D'><br></span><span style='font-size:8.0pt;color:black'>Mechanical Design Engineer</span><span style='font-size:9.0pt;color:black'><br></span><span style='font-size:9.0pt;color:#1F497D'><br></span><b><span style='font-size:10.0pt;color:#C75B12'>EPSTEIN</span></b><span style='font-size:9.0pt;color:#1F497D'><br></span><span style='font-size:8.0pt;color:black'>Architecture<br></span><span style='font-size:8.0pt;color:#C75B12'>Interiors</span><span style='font-size:8.0pt;color:black'><br>Engineering<br></span><span style='font-size:8.0pt;color:#C75B12'>Construction</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:8.0pt;color:black'>Sustainability<br><br>600 West Fulton Street<br>Chicago, Illinois 60661-1259<br><br>D: (312) 429-8116<br>F: (312) 429-8800</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:8.0pt;color:black'>E:</span><span style='font-size:8.0pt;color:#0070C0'> <a href="mailto:wmak@epsteinglobal.com" target="_blank">wmak@epsteinglobal.com</a></span><span style='font-size:8.0pt;color:black'><br>W:</span><span style='font-size:8.0pt;color:#C75B12'> <a href="http://www.epsteinglobal.com/" target="_blank"><span style='color:#C75B12'>www.epsteinglobal.com</span></a></span><span style='font-size:9.0pt;color:black'><br><br></span><span style='font-size:10.0pt;font-family:Webdings;color:#00B050'>þ</span><span style='font-size:8.0pt;color:black'> Epstein is a firm believer in sustainability. We ask that you please consider the environment before printing this e-mail.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;color:#1F497D'> </span><o:p></o:p></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:10.0pt'>From:</span></b><span style='font-size:10.0pt'> <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>On Behalf Of </b>DongEun Kim<br><b>Sent:</b> Thursday, June 23, 2011 11:58 PM<br><b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br><b>Subject:</b> [Equest-users] VAV with Electric Reheat</span><o:p></o:p></p></div><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;color:navy'>Hi all,</span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:navy'>Can anyone give me an advice regarding a problem described below?</span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;color:navy'>I need to model a VAV system with chilled water coil and hot water coil, and also with Electric Reheating.</span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;color:navy'>As a start, I selected 'VAV with HW Reheat' system.</span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;color:navy'> </span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;color:navy'>However, I've realized that the system only generates a reheating coil without a main hot water coil(heating coil).</span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;color:navy'>So I installed 'heating coil' in the detailed mode, and then,</span> <span style='color:navy'>I changed the zone heat source to be 'electric'.</span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;color:navy'>However when I take a look at the result, there came two problems.</span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;color:navy'>1. Heating was mainly done by reheating coil not by main heating coil.</span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;color:navy'>2. Reheating didn't seem to use electricity.</span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Any advice will be greatly appreciated.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thank you in advance.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>~DE <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:navy'>Kim, DongEun(DE) | Research Engineer, LEED AP<br>Annex R&D Institute, HIMEC(Hanil Mech. & Elec. Consultants)</span><o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></div></div></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></div></div></div></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></div></div></div></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></body></html>