<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt">DongEun:<br><br>There is no difference, except to make the secondary heating coil ELECTRIC. No problem in eQuest.<br><br>John Aulbach<br><div><br></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> DongEun Kim <equested@gmail.com><br><b><span style="font-weight: bold;">To:</span></b> Will Mak <wmak@epsteinglobal.com><br><b><span style="font-weight: bold;">Cc:</span></b> equest-users@lists.onebuilding.org<br><b><span style="font-weight: bold;">Sent:</span></b> Sun, June 26, 2011 9:19:02 PM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: [Equest-users] VAV with
Electric Reheat<br></font><br>
<div>Will,</div>
<div> </div>
<div>If I understand correctly, reheat Delta T, which was to specify max reheat coil capacity.</div>
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<div>What I want is to switch reheat source from 'how water' to 'ectricity', while the heating source for </div>
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<div>the main heating coil is 'how water.'</div>
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<div>Thank you.</div>
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<div>~DE<br><br></div>
<div class="gmail_quote">2011/6/24 Will Mak <span dir="ltr"><<a rel="nofollow" ymailto="mailto:wmak@epsteinglobal.com" target="_blank" href="mailto:wmak@epsteinglobal.com">wmak@epsteinglobal.com</a>></span><br>
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<p class="MsoNormal"><span style="color: rgb(31, 73, 125); font-size: 10pt;">You have to put a value for the reheat delta T or the reheat coils don’t kick on.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125); font-size: 10pt;"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span style="color: rgb(199, 91, 18);">William Mak, LEED AP BD+C</span></b><span style="color: rgb(31, 73, 125); font-size: 9pt;"><br></span><span style="color: black; font-size: 8pt;">Mechanical Design Engineer</span><span style="color: black; font-size: 9pt;"><br>
</span><span style="color: rgb(31, 73, 125); font-size: 9pt;"><br></span><b><span style="color: rgb(199, 91, 18); font-size: 10pt;">EPSTEIN</span></b><span style="color: rgb(31, 73, 125); font-size: 9pt;"><br></span><span style="color: black; font-size: 8pt;">Architecture<br>
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<p class="MsoNormal"><span style="color: black; font-size: 8pt;">E:</span><span style="color: rgb(0, 112, 192); font-size: 8pt;"> <a rel="nofollow" ymailto="mailto:wmak@epsteinglobal.com" target="_blank" href="mailto:wmak@epsteinglobal.com"><span style="color: blue;">wmak@epsteinglobal.com</span></a></span><span style="color: black; font-size: 8pt;"><br>
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<br></span><span style="font-family: Webdings; color: rgb(0, 176, 80); font-size: 10pt;">þ</span><span style="color: black; font-size: 8pt;"> Epstein is a firm believer in sustainability. We ask that you please consider the environment before printing this e-mail.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color: rgb(31, 73, 125); font-size: 10pt;"><u></u> <u></u></span></p>
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<p class="MsoNormal"><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;"> <a rel="nofollow" ymailto="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank" href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a> [mailto:<a rel="nofollow" ymailto="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank" href="mailto:equest-users-bounces@lists.onebuilding.org">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 rel="nofollow" ymailto="mailto:equest-users@lists.onebuilding.org" target="_blank" href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br><b>Subject:</b> [Equest-users] VAV with Electric Reheat<u></u><u></u></span></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal"><span style="color: navy; font-size: 10pt;">Hi all,</span><u></u><u></u></p></div>
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<p class="MsoNormal"> <u></u><u></u></p></div>
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<p class="MsoNormal"><span style="color: navy;">Can anyone give me an advice regarding a problem described below?</span><u></u><u></u></p></div>
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<p class="MsoNormal"> <u></u><u></u></p></div>
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<p class="MsoNormal"><span style="color: navy; font-size: 10pt;">I need to model a VAV system with chilled water coil and hot water coil, and also with Electric Reheating.</span><u></u><u></u></p></div>
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<p class="MsoNormal"> <u></u><u></u></p></div>
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<p class="MsoNormal"><span style="color: navy; font-size: 10pt;">As a start, I selected 'VAV with HW Reheat' system.</span><u></u><u></u></p></div>
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<p class="MsoNormal"><span style="color: navy; font-size: 10pt;"> </span><u></u><u></u></p></div>
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<p class="MsoNormal"><span style="color: navy; font-size: 10pt;">However, I've realized that the system only generates a reheating coil without a main hot water coil(heating coil).</span><u></u><u></u></p></div>
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<p class="MsoNormal"> <u></u><u></u></p></div>
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<p class="MsoNormal"><span style="color: navy; font-size: 10pt;">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><u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p></div>
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<p class="MsoNormal"> <u></u><u></u></p></div>
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<p class="MsoNormal"><span style="color: navy; font-size: 10pt;">However when I take a look at the result, there came two problems.</span><u></u><u></u></p></div>
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<p class="MsoNormal"> <u></u><u></u></p></div>
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<p class="MsoNormal"><span style="color: navy; font-size: 10pt;">1. Heating was mainly done by reheating coil not by main heating coil.</span><u></u><u></u></p></div>
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<p class="MsoNormal"> <u></u><u></u></p></div>
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<p class="MsoNormal"><span style="color: navy; font-size: 10pt;">2. Reheating didn't seem to use electricity.</span><u></u><u></u></p></div>
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<p class="MsoNormal"> <u></u><u></u></p></div>
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<p class="MsoNormal">Any advice will be greatly appreciated.<u></u><u></u></p></div>
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<p class="MsoNormal"> <u></u><u></u></p></div>
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<p class="MsoNormal">Thank you in advance.<u></u><u></u></p></div>
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<p class="MsoNormal"> <u></u><u></u></p></div>
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<p class="MsoNormal">~DE <u></u><u></u></p></div>
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<p class="MsoNormal"> <u></u><u></u></p></div>
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<p class="MsoNormal"><span style="color: navy;">Kim, DongEun(DE) | Research Engineer, LEED AP<br>Annex R&D Institute, HIMEC(Hanil Mech. & Elec. Consultants)</span><u></u><u></u></p></div>
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