<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Nick and Grammy,<br>Thanks a lot.<br>I was confused by SD input that only allows maximum 2 HVAC system.<br>Lisa Li<br><br>--- On <b>Wed, 1/12/11, Nick Caton <i><ncaton@smithboucher.com></i></b> wrote:<br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><br>From: Nick Caton <ncaton@smithboucher.com><br>Subject: RE: [Equest-users] Maximum HVAC Systems<br>To: "Grammy" <grammy.hkust@gmail.com>, "Lisa Li" <li.lisa@ymail.com><br>Cc: "equest-users" <equest-users@lists.onebuilding.org><br>Date: Wednesday, January 12, 2011, 3:13 PM<br><br><div id="yiv1165894821">
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<p class="yiv1165894821MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);">Lisa, </span></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);"> </span></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);">I believe the upper limit on # of unique systems follows the
upper limit on # of zones, which is something higher than 1,000 but I’m
not certain where the sidewalk ends in the current version 3.64. If you
should have more than 1,000 zones or systems to include in one building, you might
need to use multiple models.</span></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);"> </span></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);">A more probable limit for most situations is the number of zones
actually defined – and this relates to Grammy’s point about 1
system per zone: If you only have 15 zones, you can’t complete a
simulation with more than 15 systems. It follows that you need a minimum
of 15 spaces to define 15 zones. The important point to take away here is
that you really must, at a minimum, define at least one distinct space to
correspond to each system when you are considering and creating your building
geometries. </span></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);"> </span></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);">The building design you’re describing thus far sounds
perfectly do-able within eQuest.</span></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);"> </span></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);">~Nick</span></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);"> </span></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);"> </span></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);"><img id="yiv1165894821Picture_x0020_1" src="cid:1.2531544657@web112305.mail.gq1.yahoo.com" alt="cid:489575314@22072009-0ABB" height="37" width="119"></span><b><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(45, 77, 94);"></span></b></p>
<p class="yiv1165894821MsoNormal"><b><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(45, 77, 94);"> </span></b></p>
<p class="yiv1165894821MsoNormal"><b><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(45, 77, 94);">NICK CATON, E.I.T.</span></b><b><span style="font-family: "sans-serif"; color: rgb(45, 77, 94);"></span></b></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 7.5pt; font-family: "sans-serif"; color: rgb(204, 153, 0);">PROJECT ENGINEER</span></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: rgb(45, 77, 94);">Smith & Boucher Engineers</span><span style="font-size: 7.5pt; color: rgb(204, 153, 0);"></span></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: rgb(45, 77, 94);">25501 west valley parkway</span></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: rgb(45, 77, 94);">olathe ks 66061</span></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: rgb(45, 77, 94);">direct 913 344.0036</span></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 10pt; font-family: "sans-serif"; color: rgb(45, 77, 94);">fax 913 345.0617</span></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);"><a rel="nofollow" title="blocked::www.smithboucher.com"><span style="font-size: 10pt;">www.smithboucher.com</span></a></span><u><span style="font-size: 10pt; font-family: "sans-serif"; color: blue;"> </span></u><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);"></span></p>
<p class="yiv1165894821MsoNormal"><span style="font-size: 11pt; font-family: "sans-serif"; color: rgb(31, 73, 125);"> </span></p>
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<p class="yiv1165894821MsoNormal"><b><span style="font-size: 10pt; font-family: "sans-serif";">From:</span></b><span style="font-size: 10pt; font-family: "sans-serif";">
equest-users-bounces@lists.onebuilding.org
[mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Grammy<br>
<b>Sent:</b> Wednesday, January 12, 2011 4:49 AM<br>
<b>To:</b> Lisa Li<br>
<b>Cc:</b> equest-users<br>
<b>Subject:</b> Re: [Equest-users] Maximum HVAC Systems</span></p>
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<p class="yiv1165894821MsoNormal">Hi, Lisa,</p>
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<p class="yiv1165894821MsoNormal">I am not clear what's your point, but I can state that one
zone have only one system assigned (exception only baseboard). And one building
can have more than one system to condition different zones: condition or
ventilation only, or uncontidtion. </p>
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<p class="yiv1165894821MsoNormal">On Wed, Jan 12, 2011 at 9:52 AM, Lisa Li <<a rel="nofollow" ymailto="mailto:li.lisa@ymail.com" target="_blank" href="/mc/compose?to=li.lisa@ymail.com">li.lisa@ymail.com</a>> wrote:</p>
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<p class="yiv1165894821MsoNormal" style="margin-bottom: 12pt;">Dear All,<br>
How many HVAC systems can be created to model a building with multi-zones?<br>
I am doing energy consumption modeling for an existing club house building.
There are rooftop units with gas heating, split AC units, split heat pumps
and gas furnace with split DX coils, etc. All the units have different
capacity and EER too.<br>
Regards,<br>
Lisa Li</p>
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