<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=utf-8">
<meta name="Generator" content="Microsoft Word 14 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:Helvetica;
panose-1:2 11 6 4 2 2 2 2 2 4;}
@font-face
{font-family:PMingLiU;
panose-1:2 2 5 0 0 0 0 0 0 0;}
@font-face
{font-family:PMingLiU;
panose-1:2 2 5 0 0 0 0 0 0 0;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:"Franklin Gothic Book";
panose-1:2 11 5 3 2 1 2 2 2 4;}
@font-face
{font-family:"\@PMingLiU";
panose-1:2 2 5 0 0 0 0 0 0 0;}
@font-face
{font-family:"MS UI Gothic";
panose-1:2 11 6 0 7 2 5 8 2 4;}
@font-face
{font-family:"\@MS UI Gothic";
panose-1:2 11 6 0 7 2 5 8 2 4;}
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:TimesNewRomanPS-BoldMT;}
@font-face
{font-family:TimesNewRomanPSMT;}
@font-face
{font-family:TimesNewRomanPS-ItalicMT;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","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.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Balloon Text Char";
margin:0in;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";}
span.BalloonTextChar
{mso-style-name:"Balloon Text Char";
mso-style-priority:99;
mso-style-link:"Balloon Text";
font-family:"Tahoma","sans-serif";}
span.EmailStyle19
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:#1F497D;}
span.EmailStyle20
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:#1F497D;}
span.EmailStyle21
{mso-style-type:personal-reply;
font-family:"Franklin Gothic Book","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></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"><span style="font-size:11.0pt;font-family:"Franklin Gothic Book","sans-serif";color:#1F497D">I am hoping for some insight for modeling the efficiencies of split system heat pumps and other such stand alone systems.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Franklin Gothic Book","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Franklin Gothic Book","sans-serif";color:#1F497D">In this case, the shop drawing provides the ARI rated efficiencies which include the fan power. But this shop drawing does not provide the fan
motor power.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Franklin Gothic Book","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Franklin Gothic Book","sans-serif";color:#1F497D">In the past I would convert the rated EER to COP using COP = EER/3.4121 and I would assume no fan power as the rating includes the fan power.
But this project is being submitted to the USGBC and I am worried that the GBCI may have an issue with this.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Franklin Gothic Book","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Franklin Gothic Book","sans-serif";color:#1F497D">As Maria pointed out, 90.1-2013 now provides the formula to convert EER to COP, removing the fan power. The baseline fan power would be calculated
using the formulas in G3.1.2.10. Would it be best to use the same method to calculate the proposed case fan power and COP?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Franklin Gothic Book","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Franklin Gothic Book","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Franklin Gothic Book","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><img width="108" height="43" id="Picture_x0020_2" src="cid:image004.png@01D0BA58.776A54D0" alt="cid:image003.png@01D09C46.E75BA0D0"></span><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1C467A"><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1C467A">Christopher Jones,</span></b><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">
</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">P.Eng.<i>
<br>
</i></span><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Senior Engineer<b><o:p></o:p></b></span></p>
<p class="MsoNormal"><b><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">WSP Canada Inc.<o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">2300 Yonge Street, Suite 2300<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Toronto, ON M4P 1E4</span><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#595959"><br>
</span><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">T +1 416-644-4226<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">F +1 416-487-9766<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">C +1 416-697-0065<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D"><a href="http://www.wspgroup.com/">www.wspgroup.com</a>
</span><i><span lang="EN-CA" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#565656"><o:p></o:p></span></i></p>
</div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Franklin Gothic Book","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Equest-users [mailto:equest-users-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Maria Karpman<br>
<b>Sent:</b> Tuesday, May 26, 2015 10:18 AM<br>
<b>To:</b> 'Nicholas Caton'; 'Equest-users'<br>
<b>Subject:</b>: Reply</span><span style="font-size:10.0pt;font-family:"MS UI Gothic","sans-serif"">：</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> The problem of minimum equipment efficiency requirement of Ashrae 90.1-2007<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">As far as SEER to EER and HSPF to COP conversions, 90.1 2013 finally provided these in G3.1.2.1, along with the formulas for extracting fan power from efficiency
ratings: <o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><b><span style="font-size:10.0pt;font-family:TimesNewRomanPS-BoldMT"><o:p> </o:p></span></b></p>
<p class="MsoNormal" style="text-autospace:none"><b><span style="font-size:10.0pt;font-family:TimesNewRomanPS-BoldMT">G3.1.2.1 Equipment Efficiencies.
</span></b><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">All HVAC equipment<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">in the baseline building design shall be modeled at the mini-<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">mum efficiency levels, both part load and full load, in accordance<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">with Section 6.4. Chillers shall use Path A efficiencies<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">as shown in Table 6.8.1-3 where efficiency ratings include<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">supply fan energy, the efficiency rating shall be adjusted to<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">remove the supply fan energy. For Baseline HVAC Systems 1,<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">2, 3, 4, 5, and 6, calculate the minimum COP</span><i><span style="font-size:8.0pt;font-family:TimesNewRomanPS-ItalicMT">nfcooling
</span></i><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">and<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">COP</span><i><span style="font-size:8.0pt;font-family:TimesNewRomanPS-ItalicMT">nfheating
</span></i><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">using the equation for the applicable performance<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">rating as indicated in Tables 6.8.1-1 through 6.8.1-4.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">Where a full- and part-load efficiency rating is provided in<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">Tables 6.8.1-1 through 6.8.1-4, the full-load equation below<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">shall be used:<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT;background:yellow;mso-highlight:yellow">COP</span><i><span style="font-size:8.0pt;font-family:TimesNewRomanPS-ItalicMT;background:yellow;mso-highlight:yellow">nfcooling
</span></i><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT;background:yellow;mso-highlight:yellow">= 7.84E-8 × EER ×
</span><i><span style="font-size:10.0pt;font-family:TimesNewRomanPS-ItalicMT;background:yellow;mso-highlight:yellow">Q
</span></i><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT;background:yellow;mso-highlight:yellow">+ 0.338 × EER<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT;background:yellow;mso-highlight:yellow">COP</span><i><span style="font-size:8.0pt;font-family:TimesNewRomanPS-ItalicMT;background:yellow;mso-highlight:yellow">nfcooling
</span></i><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT;background:yellow;mso-highlight:yellow">= –0.0076 × SEER</span><span style="font-size:8.0pt;font-family:TimesNewRomanPSMT;background:yellow;mso-highlight:yellow">2
</span><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT;background:yellow;mso-highlight:yellow">+ 0.3796 × SEER<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT;background:yellow;mso-highlight:yellow">COP</span><i><span style="font-size:8.0pt;font-family:TimesNewRomanPS-ItalicMT;background:yellow;mso-highlight:yellow">nfheating
</span></i><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT;background:yellow;mso-highlight:yellow">= 1.48E-7 × COP</span><i><span style="font-size:8.0pt;font-family:TimesNewRomanPS-ItalicMT;background:yellow;mso-highlight:yellow">47
</span></i><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT;background:yellow;mso-highlight:yellow">×
</span><i><span style="font-size:10.0pt;font-family:TimesNewRomanPS-ItalicMT;background:yellow;mso-highlight:yellow">Q
</span></i><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT;background:yellow;mso-highlight:yellow">+ 1.062 × COP</span><i><span style="font-size:8.0pt;font-family:TimesNewRomanPS-ItalicMT;background:yellow;mso-highlight:yellow">47<o:p></o:p></span></i></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT;background:yellow;mso-highlight:yellow">(applies to heat-pump heating efficiency only)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT;background:yellow;mso-highlight:yellow">COP</span><i><span style="font-size:8.0pt;font-family:TimesNewRomanPS-ItalicMT;background:yellow;mso-highlight:yellow">nfheating
</span></i><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT;background:yellow;mso-highlight:yellow">= –0.0296 × HSPF</span><span style="font-size:8.0pt;font-family:TimesNewRomanPSMT;background:yellow;mso-highlight:yellow">2
</span><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT;background:yellow;mso-highlight:yellow">+ 0.7134 × HSPF</span><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">where COP</span><i><span style="font-size:8.0pt;font-family:TimesNewRomanPS-ItalicMT">nfcooling
</span></i><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">and COP</span><i><span style="font-size:8.0pt;font-family:TimesNewRomanPS-ItalicMT">nfheating
</span></i><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">are the packaged HVAC<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">equipment cooling and heating energy efficiency, respectively,<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">to be used in the baseline building, which excludes<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">supply fan power, and
</span><i><span style="font-size:10.0pt;font-family:TimesNewRomanPS-ItalicMT">Q </span>
</i><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">is the AHRI-rated cooling capacity<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">in Btu/h.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">EER, SEER, COP, and HSPF shall be at AHRI test conditions.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">Fan energy shall be modeled separately according to<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT">Section G3.1.2.10.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:TimesNewRomanPSMT"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hope this helps,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Maria<o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">--
<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Verdana","sans-serif";color:#666666">Maria Karpman
</span></b><span style="font-size:11.0pt;font-family:"Verdana","sans-serif";color:#666666">LEED AP, BEMP, CEM</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Verdana","sans-serif";color:#666666">________________</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Verdana","sans-serif";color:#666666">Karpman Consulting<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#666666"><a href="http://www.karpmanconsulting.net/">www.karpmanconsulting.net</a>
</span><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:#666666">Phone </span><span style="font-size:7.5pt;font-family:"Helvetica","sans-serif";color:#666666;background:white">860.430.1909 </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#666666">41C New London Turnpike</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial","sans-serif";color:#666666">Glastonbury, CT 06033</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Equest-users [<a href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b>On Behalf Of </b>Nicholas Caton<br>
<b>Sent:</b> Friday, May 29, 2015 11:17 AM<br>
<b>To:</b> </span><span style="font-size:10.0pt;font-family:"PMingLiU","serif"">赵永青</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">; Equest-users<br>
<b>Subject:</b> Re: [Equest-users] RE: Reply</span><span style="font-size:10.0pt;font-family:"MS UI Gothic","sans-serif"">：</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> The problem of minimum equipment efficiency requirement of Ashrae
90.1-2007<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Yeah same for my case (not AFUE), though that’s good thinking!
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">When I do have an AFUE boiler requirement, I have found it easier to stick with the default library curves / standby inputs & to determine the full load HIR
with the following equations:</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">HIR = f(AFUE):
<i> [Reference: California Energy Commission's 2005 "Nonresidential Alternative Calculation Method (ACM) Approval Manual"]</i>
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> For single packaged central furnace (baseline system #3): HIR = (.005163*AFUE+0.4033)^-1
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> For Boilers where 75 ≤ AFUE < 80 (Baseline systems #1, #5 ): HIR = (0.1*AFUE+72.5)^-1*100
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> For Boilers where 80 ≤ AFUE < 100 (Baseline systems #1, #5 ): HIR = (0.875*AFUE+10.5)^-1*100
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">For completeness, here are the other equations I keep handy for converting other seasonal efficiencies to steady-state inputs:</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">EER=f(SEER):
<i>[Reference: NREL Building America House Simulation Protocol (Revised), citing Wassmer, M. (2003). A Component-Based Model for Residential Air Conditioner and Heat Pump Energy Calculations.]</i></span><o:p></o:p></p>
<p class="MsoNormal" style="text-indent:.5in"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">(AC) (Baseline Systems #1, #3, #5 & #6): EER<sub>NET</sub>= -0.0182*SEER^2 + 1.1088*SEER</span><o:p></o:p></p>
<p class="MsoNormal" style="text-indent:.5in"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">(HP-cooling) (Baseline Systems #2 & #4): EER<sub>NET</sub> = -0.02*SEER^2 + 1.1268*SEER</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">COP=f(HSPF):
<i>[Reference: Wassmer, M. (2003). A Component-Based Model for Residential Air Conditioner and Heat Pump Energy Calculations. Masters Thesis, University of Colorado at Boulder.]</i></span><o:p></o:p></p>
<p class="MsoNormal" style="text-indent:.5in"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">(HP-heating) (Baseline Systems #2 & #4): COP<sub>NET</sub> = -0.0255*HSPF^2 + 0.6239*HSPF</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">IIRC, each of the above cited references determines these equations based on a survey of real-world equipment from various manufacturers in order to plot a
quadratic trendline. That trendline establishes the relationship between steady state full load efficiency and the associated seasonal efficiency rating. In time (or until such equations are added to Appendix G to regulate how modelers approach seasonal
efficiency requirements), it may be appropriate to seek out similar research to update these equations every so often, but for the present and past couple of years I have had zero problems using this family of equations for my LEED reviews.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">~Nick</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D">NICK CATON, P.E.</span></b><span style="font-size:11.0pt;font-family:"Verdana","sans-serif";color:#1F497D"><br>
</span><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#561782">Owner</span></b><o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#561782"> </span></b><o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#561782">Caton Energy Consulting</span></b><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:black"><br>
</span><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> 1150 N. 192<sup>nd</sup> St., #4-202</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> Shoreline, WA 98133<br>
office: 785.410.3317</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#561782"><a href="www.catonenergy.com"><span style="color:#561782">www.catonenergy.com</span></a></span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
</div>
<hr>
<div style="font-size:9pt; color:gray; font-family:Arial, sans-serif;"><br>
You are receiving this communication because you are listed as a current WSP contact. Should you have any questions regarding WSP’s electronic communications policy, please consult our Anti-Spam Commitment
<a href="www.wspgroup.com/casl">www.wspgroup.com/casl</a>. For any concern or if you believe you should not be receiving this message, please forward this message to us at
<a href="mailto:caslcompliance@wspgroup.com">caslcompliance@wspgroup.com</a> so that we can promptly address your request. This message is intended only for the use of the individual or entity to which it is addressed, and may contain information which is privileged,
confidential, proprietary or exempt from disclosure under applicable law. If you are not the intended recipient or the person responsible for delivering the message to the intended recipient, you are strictly prohibited from disclosing, distributing, copying
or in any way using this message. If you have received this communication in error, please notify the sender, and destroy and delete any copies you may have received.
<br>
<br>
WSP provides professional land surveying services through the following entities: WSP Surveys (AB) Limited Partnership and WSP Surveys (BC) Limited Partnership
</div>
</body>
</html>