<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
<title></title>
</head>
<body bgcolor="#ffffff" text="#000000">
Hi,<br>
Probably because the chiller's EIR is reduced due to a more favorable
inlet temperature. Have a look at your chiller performance curves in
the model.<br>
<br>
En/na Aulbach, John ha escrit:
<blockquote
cite="mid:99A2815FF4D295488E034407278B16A402494FB6@sacexm01.nexant.corp"
type="cite">
<meta http-equiv="Content-Type" content="text/html; ">
<meta content="MSHTML 6.00.2900.2963" name="GENERATOR">
<div><span class="930022000-31102008"><font color="#0000ff"
face="Arial" size="2">All:</font></span></div>
<div><span class="930022000-31102008"></span> </div>
<div><span class="930022000-31102008"><font color="#0000ff"
face="Arial" size="2">I have run a Base Case and a Parametric run for
a Central Plant serving an office complex. Everything in both runs is
the same, EXCEPT that the Base run has a 10°F differential temperature
and the Parametric run has a 15°F differential temperature. The CHW
pump is variable speed.</font></span></div>
<div><span class="930022000-31102008"></span> </div>
<div><span class="930022000-31102008"><font color="#0000ff"
face="Arial" size="2">As expected, electric energy is saved (about
40,000 kWh/year for a 600 ton plant). However, about 15,000 kWh is
saved at the Chilled Water pump, and 22,000 kWh is saved at the chiller.</font></span></div>
<div><span class="930022000-31102008"></span> </div>
<div><span class="930022000-31102008"><font color="#0000ff"
face="Arial" size="2">I changed the Loop Design DT to 15°F and the CHW
Coil Design Delta T to 15°F.</font></span></div>
<div><span class="930022000-31102008"></span> </div>
<div><span class="930022000-31102008"><font color="#0000ff"
face="Arial" size="2">Why is my chiller energy reducing?</font></span></div>
<div><span class="930022000-31102008"></span> </div>
<div><span class="930022000-31102008"><font color="#0000ff"
face="Arial" size="2">Thanks.</font></span></div>
<div><span class="930022000-31102008"></span> </div>
<div><span class="930022000-31102008">
<div align="left">
<div align="left"><font color="#0000ff">John R. Aulbach, PE, CEM</font></div>
<div align="left"><font face="Arial" size="2"><em>Project Manager</em></font></div>
<div align="left"><font face="Arial" size="2"><font color="#0000ff">Nexant,
Inc</font>.</font></div>
<div align="left"><font face="Arial" size="2">701 West Kimberly Ave.,
Suite 245</font></div>
<div align="left"><font face="Arial" size="2">Placentia, CA
92870-6342 USA</font></div>
<div align="left"><font face="Arial" size="2">Phone: 714-524-4402</font></div>
<div align="left"><font face="Arial" size="2">Fax: 714-524-4407</font></div>
<div align="left"><font face="Arial" size="2">email: <a
moz-do-not-send="true" title="mailto:jaulbach@nexant.com"
href="mailto:jaulbach@nexant.com">jaulbach@nexant.com</a></font></div>
<div> </div>
</div>
</span></div>
<pre wrap="">
<hr size="4" width="90%">
_______________________________________________
Equest-users mailing list
<a class="moz-txt-link-freetext" href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a>
To unsubscribe from this mailing list send a blank message to <a class="moz-txt-link-abbreviated" href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a>
</pre>
</blockquote>
<br>
<div class="moz-signature">-- <br>
<meta http-equiv="Content-Type" content="text/html; ">
<meta name="ProgId" content="Word.Document">
<meta name="Generator" content="Microsoft Word 11">
<meta name="Originator" content="Microsoft Word 11">
<link rel="File-List" href="Xavier%20Garcia_archivos/filelist.xml">
<title>Jaume Salom</title>
<!--[if gte mso 9]><xml>
<o:DocumentProperties>
<o:Author>Usuari</o:Author>
<o:Template>Normal</o:Template>
<o:LastAuthor>Xavier García Casals</o:LastAuthor>
<o:Revision>14</o:Revision>
<o:TotalTime>21</o:TotalTime>
<o:Created>2006-10-03T14:16:00Z</o:Created>
<o:LastSaved>2008-02-18T17:46:00Z</o:LastSaved>
<o:Pages>1</o:Pages>
<o:Words>75</o:Words>
<o:Characters>414</o:Characters>
<o:Company>AIGUASOL</o:Company>
<o:Lines>3</o:Lines>
<o:Paragraphs>1</o:Paragraphs>
<o:CharactersWithSpaces>488</o:CharactersWithSpaces>
<o:Version>11.6568</o:Version>
</o:DocumentProperties>
</xml><![endif]--><!--[if gte mso 9]><xml>
<w:WordDocument>
<w:SpellingState>Clean</w:SpellingState>
<w:GrammarState>Clean</w:GrammarState>
<w:HyphenationZone>21</w:HyphenationZone>
<w:PunctuationKerning/>
<w:ValidateAgainstSchemas/>
<w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid>
<w:IgnoreMixedContent>false</w:IgnoreMixedContent>
<w:AlwaysShowPlaceholderT
ext>false</w:AlwaysShowPlaceholderText>
<w:Compatibility>
<w:BreakWrappedTables/>
<w:SnapToGridInCell/>
<w:WrapTextWithPunct/>
<w:UseAsianBreakRules/>
<w:DontGrowAutofit/>
</w:Compatibility>
<w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel>
</w:WordDocument>
</xml><![endif]--><!--[if gte mso 9]><xml>
<w:LatentStyles DefLockedState="false" LatentStyleCount="156">
</w:LatentStyles>
</xml><![endif]-->
<style>
<!--
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{mso-style-parent:"";
margin:0cm;
margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:12.0pt;
font-family:"Times New Roman";
mso-fareast-font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;
text-underline:single;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;
text-underline:single;}
pre
{margin:0cm;
margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:10.0pt;
font-family:"Courier New";
mso-fareast-font-family:"Times New Roman";}
span.SpellE
{mso-style-name:"";
mso-spl-e:yes;}
@page Section1
{size:595.3pt 841.9pt;
margin:70.85pt 3.0cm 70.85pt 3.0cm;
mso-header-margin:35.4pt;
mso-footer-margin:35.4pt;
mso-paper-source:0;}
div.Section1
{page:Section1;}
-->
</style><!--[if gte mso 10]>
<style>
/* Style Definitions */
table.MsoNormalTable
{mso-style-name:"Tabla normal";
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-parent:"";
mso-padding-alt:0cm 5.4pt 0cm 5.4pt;
mso-para-margin:0cm;
mso-para-margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:10.0pt;
font-family:"Times New Roman";
mso-ansi-language:#0400;
mso-fareast-language:#0400;
mso-bidi-language:#0400;}
table.Taulanormal
{mso-style-name:"Taula normal";
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-parent:"";
mso-padding-alt:0cm 5.4pt 0cm 5.4pt;
mso-para-margin:0cm;
mso-para-margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:10.0pt;
font-family:"Times New Roman";
mso-ansi-language:#0400;
mso-fareast-language:#0400;
mso-bidi-language:#0400;}
</style>
<![endif]--><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="17410"/>
</xml><![end
if]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1"/>
</o:shapelayout></xml><![endif]-->
<div class="Section1">
<pre><b><span style="font-size: 12pt; font-family: Arial;" lang="CA"><o:p> </o:p></span></b></pre>
<pre><b><span style="font-size: 12pt; font-family: Arial;" lang="CA">Xavier García Casals</span></b><span
style="font-family: Arial;" lang="CA"><o:p></o:p></span></pre>
<pre><span style="font-family: Arial;" lang="CA"><o:p> </o:p></span></pre>
<pre><span class="SpellE"><b><span style="font-family: Arial;" lang="CA">Sistemas</span></b></span><b><span
style="font-family: Arial;" lang="CA"> Solares, <span class="SpellE">Eficiencia</span> <span
class="SpellE">Energética</span> e <span class="SpellE">Ingeniería</span> <span
class="SpellE">Bioclimática</span></span></b><b style=""><span
style="font-family: Arial;" lang="CA"> <o:p></o:p></span></b></pre>
<pre><span class="SpellE"><b><span style="font-family: Arial;" lang="CA">AIGUASOL</span></b></span><b><span
style="font-family: Arial;" lang="CA"> <span class="SpellE">INGENIERÍA</span><o:p></o:p></span></b></pre>
<pre><b style=""><span style="font-family: Arial;" lang="CA"> <o:p></o:p></span></b></pre>
<pre><span
style="font-size: 8pt; font-family: Arial; color: rgb(0, 153, 0);"
lang="CA">Sistemes Avançats d’Energia Solar Tèrmica <span
class="SpellE">SCCL</span><o:p></o:p></span></pre>
<pre><span
style="font-size: 8pt; font-family: Arial; color: rgb(0, 153, 0);"
lang="CA">C/ <span class="SpellE">Palermo</span>, 17. <span
class="SpellE">Bajos</span> <span class="SpellE">dcha</span>. 28043 Madrid<o:p></o:p></span></pre>
<pre><span
style="font-size: 8pt; font-family: Arial; color: rgb(0, 153, 0);"
lang="CA">Tel: (+34) 91 142 27 88<o:p></o:p></span></pre>
<pre><span
style="font-size: 8pt; font-family: Arial; color: rgb(0, 153, 0);"
lang="CA"><o:p> </o:p></span></pre>
<pre><span
style="font-size: 8pt; font-family: Arial; color: rgb(0, 153, 0);"
lang="CA">C/ Roger de <span class="SpellE">Llúria</span>,<span style=""> </span>29 3r 2a 08009 Barcelona<o:p></o:p></span></pre>
<pre><span
style="font-size: 8pt; font-family: Arial; color: rgb(0, 153, 0);"
lang="CA">Tel: (+34) 93 342 47 55<span style=""> </span>Fax: (+34) 93 342 47 56<o:p></o:p></span></pre>
<pre><span
style="font-size: 8pt; font-family: Arial; color: rgb(0, 153, 0);"
lang="CA"><o:p> </o:p></span></pre>
<pre><span class="SpellE"><span
style="font-size: 8pt; font-family: Arial; color: rgb(0, 153, 0);"
lang="CA">Mobil</span></span><span
style="font-size: 8pt; font-family: Arial; color: rgb(0, 153, 0);"
lang="CA">: 660 22 94 45<o:p></o:p></span></pre>
<pre><span style="font-size: 8pt; font-family: Arial; color: blue;"
lang="CA"><a href="mailto:xavier.garcia@aiguasol.coop">xavier.garcia@aiguasol.coop</a></span><span
class="MsoHyperlink"><o:p></o:p></span></pre>
<pre><span style="font-size: 8pt; font-family: Arial; color: blue;"
lang="CA"><a href="http://www.aiguasol.coop/">http://www.aiguasol.coop</a></span></pre>
<pre><b><span style="font-size: 12pt; font-family: Arial;" lang="CA"><o:p> </o:p></span></b></pre>
<p class="MsoNormal"><span style="" lang="CA"><o:p> </o:p></span></p>
</div>
</div>
</body>
</html>