<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 12 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:845290956;
mso-list-type:hybrid;
mso-list-template-ids:-1202928536 67698711 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;}
@list l0:level1
{mso-level-number-format:alpha-lower;
mso-level-text:"%1\)";
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l1
{mso-list-id:1262223894;
mso-list-type:hybrid;
mso-list-template-ids:1970556626 -2081885330 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;}
@list l1:level1
{mso-level-number-format:alpha-lower;
mso-level-text:"%1\)";
mso-level-tab-stop:none;
mso-level-number-position:left;
margin-left:.75in;
text-indent:-.25in;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal">I’m interested in what people think is the right way to treat this scenario for LEED/Appendix G, I could see it going either way :<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Climate zone 5a, District Cooling plant, using option 1 (stand alone bldg), but the central cooling plant shuts down between Nov 1 and Mar 1. For the baseline, do I :<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">a)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Use a district chilled water meter all year.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">b)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Use a district chilled water meter all year, but match the proposed sequence and shut down during the winter<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">c)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Shut down in the winter, but provide the non-DES cooling system for that period.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m leaning towards A, since the economizer should handle almost all the loads, but there is the part in App G where they talk about heating and cooling must be available in the building.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Bonus:<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in">For the IT loads, there are WSHPs on a drycooler loop, since CHW is not available year round. Do I use:<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:.75in;text-indent:-.25in;mso-list:l1 level1 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">a)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>District chilled water all year,<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:.75in;text-indent:-.25in;mso-list:l1 level1 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">b)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Shut down chilled water in the winter, but provide the non-DES cooling system for that period.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Leaning towards B on this one. Seems more “fair” since there is a significant cooling load year round but the primary cooling source (CHW) is not available year round. I see it similar to the schedules that differ for more than 40 hours
per week exception.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The kicker is that because they are IT units, their performance on a glycol loops is less than stellar compared to the air cooled baseline system.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Let me know you think. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Brendan Hall, PE, LEED AP</span><span style="font-family:"Arial","sans-serif";color:black">
</span><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:black">BD+C</span><span style="font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Engineer, Mechanical<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:13.5pt;font-family:"Arial","sans-serif";color:red">karpinski<br>
</span><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#1F497D">ENGINEERING</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"><br>
</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">3135 Euclid Avenue<br>
Cleveland, OH 44115</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"><br>
</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red">P</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">
<a href="tel:216.391.3700" target="_blank"><span style="color:blue">216.391.3700</span></a> Ext 3111<br>
</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red">E</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:navy">
</span><u><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue"><a href="mailto:bhall@karpinskieng.com" target="_blank" title="mailto:myuhasz@karpinskieng.com"><span style="color:blue">bhall@karpinskieng.com</span></a></span></u><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue"><br>
</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:red">W
</span><u><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:blue">www.<a href="http://www.karpinskieng.com/" target="_blank" title="http://www.karpinskieng.com/"><span style="color:blue">karpinskieng.com</span></a></span></u><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>