<div>the mostly common heating system for PTAC is generally heat pump with electric backup.when I did modeling for it, the fan energy consumption was very high.</div>
<div>Regards</div>
<div>Deepika<br><br></div>
<div class="gmail_quote">On Mon, Dec 13, 2010 at 7:40 AM, Bruce Easterbrook <span dir="ltr"><<a href="mailto:bruce5@bellnet.ca">bruce5@bellnet.ca</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">
<div bgcolor="#ffffff" text="#000000"><font size="+1">On your bottom screen adjust the throttling range, try 2 and 4.  .3 is too tight, the system will fight itself.<br>Bruce Easterbrook<br>Abode Engineering<br></font>
<div>
<div></div>
<div class="h5"><br>On 13/12/2010 08:52 AM, zhiren zhou wrote: </div></div>
<blockquote type="cite">
<div>
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<div class="h5">
<div>
<p class="MsoNormal"><span style="FONT-SIZE: 12pt" lang="EN-US">Dear all</span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 12pt" lang="EN-US">       Now I’m doing a LEED-CS energy simulation, part of the project is residential type and I use system 1(PTAC), and the proposed is FCU+DOAs. The results shows that the baseline is consume less energy. </span></p>

<p style="TEXT-INDENT: 21pt" class="MsoNormal"><span style="FONT-SIZE: 12pt" lang="EN-US">So the question is: Does PTAC consumes less energy than FCU+DOAs?</span></p>
<p style="TEXT-INDENT: 21pt" class="MsoNormal"><span style="FONT-SIZE: 12pt" lang="EN-US">Of course I’m not sure whether I has modeled the PTAC correctly. So I put some important images below. The cooling source is DX and the heat source is hot water loop. The supply fan is 0.0003Kw/CFM, and I keep the EIR default of 0.438 which is a low efficiency.</span></p>

<p style="TEXT-INDENT: 21pt" class="MsoNormal"><span lang="EN-US">Could anyone tell me the cause or the mistake I’ve made? Thanks a lot!</span></p>
<p style="TEXT-INDENT: 21pt" class="MsoNormal"><span lang="EN-US"> </span></p>
<p style="TEXT-INDENT: 21pt" class="MsoNormal"><span lang="EN-US">                             Yours  Zhiren Zhou</span></p>
<p style="TEXT-INDENT: 21pt" class="MsoNormal"><span lang="EN-US"> </span></p>
<p style="TEXT-INDENT: 21pt" class="MsoNormal"><span lang="EN-US"><img src="https://mail.google.com/mail/html/compose/static_files/blank_quirks.html?ui=2&ik=a30d8632cf&view=att&th=12ce064e454f551b&attid=0.0.1&disp=emb&zw" width="859" height="618"></span><span lang="EN-US"></span></p>

<p style="TEXT-INDENT: 21pt" class="MsoNormal"><span lang="EN-US"> </span></p>
<p style="TEXT-INDENT: 21pt" class="MsoNormal"><span lang="EN-US"><img src="https://mail.google.com/mail/html/compose/static_files/blank_quirks.html?ui=2&ik=a30d8632cf&view=att&th=12ce064e454f551b&attid=0.0.2&disp=emb&zw" width="726" height="532"></span><span lang="EN-US"></span></p>

<p style="TEXT-INDENT: 21pt" class="MsoNormal"><span lang="EN-US"> </span></p>
<p style="TEXT-INDENT: 21pt" class="MsoNormal"><span lang="EN-US"> </span></p>
<p style="TEXT-INDENT: 21pt" class="MsoNormal"><span lang="EN-US"><img src="https://mail.google.com/mail/html/compose/static_files/blank_quirks.html?ui=2&ik=a30d8632cf&view=att&th=12ce064e454f551b&attid=0.0.3&disp=emb&zw" width="726" height="535"></span><span lang="EN-US"></span></p>

<p style="TEXT-INDENT: 21pt" class="MsoNormal"><span lang="EN-US"> </span></p>
<p style="TEXT-INDENT: 21pt" class="MsoNormal"><span lang="EN-US"><img src="https://mail.google.com/mail/html/compose/static_files/blank_quirks.html?ui=2&ik=a30d8632cf&view=att&th=12ce064e454f551b&attid=0.0.4&disp=emb&zw" width="732" height="532"></span><span lang="EN-US"></span></p>

<p style="TEXT-INDENT: 21pt" class="MsoNormal"><span lang="EN-US"> </span></p>
<p style="TEXT-INDENT: 21pt" class="MsoNormal"><span lang="EN-US"><img src="https://mail.google.com/mail/html/compose/static_files/blank_quirks.html?ui=2&ik=a30d8632cf&view=att&th=12ce064e454f551b&attid=0.0.5&disp=emb&zw" width="720" height="535"></span><span lang="EN-US"></span></p>

<p class="MsoNormal"><span lang="EN-US"> </span></p></div></div></div><pre><fieldset></fieldset>
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<div>Deepika Khowal, LEED Green Associate</div>
<div>Energy Engineer, Soladigm Inc.</div>
<div><span style="COLOR: #1f497d; FONT-SIZE: 11pt"><span style="FONT-SIZE: 11pt"><font color="#000000"> </font></span></span></div><br>