<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=windows-1252"
http-equiv="Content-Type">
<title></title>
</head>
<body bgcolor="#ffffff" text="#000000">
Indeed, varaible reference comparison methodologies (each building is
compared with a different reference and judged by its relative
performace compared with this variable reference) are far from an
objectives oriented methodology, and can easily introduce distorsions
when applied (like better qualifying solutions consuming more energy
than other solutions with worse qualification). They are 'easy' to
implement but not that useful to achieve quantified objectives in
reducing building energy consumption. On the other hand, fixed
reference comparison methodologies (where the building performance is
compared with an absolute indicator like kWh/m2-y or emissions) are a
bit more hard to implement since an apropriate scale for the abolute
indicator has to be choosen to properly represent each use cathegory of
the current building stock, but then ara completly oriented to
objectives. In the US you already have mechanisms to stablish the
apprpriate scales for the absolute indicator (e.i. Energy Star), and
therefore it seems a pity that Std. 90.1 and LEED rely on variable
reference comparison methodologies.<br>
<br>
En/na Varkie C Thomas ha escrit:
<blockquote cite="mid:e101ad9551eb.51ebe101ad95@iit.edu" type="cite">I
received a few responses to this message from outside the USA sent
directly to me. Below is the message again with some additional points
in red. The sections highlighted in yellow is from one of the responses<br>
<br>
<table class="MsoNormalTable" style="width: 100%;" border="0"
cellpadding="0" width="100%">
<tbody>
<tr style="">
<td
style="border: medium none rgb(212, 208, 200); padding: 0.75pt; background-color: transparent;">
<div class="MsoNormal"
style="margin: 0in 0in 0pt; text-align: center;" align="center">
<hr align="center" size="2" width="100%"></div>
<p class="MsoNormal" style="margin: 0in 0in 0pt;"><b><span
style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">From:</span></b><span
style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">
<a class="moz-txt-link-abbreviated" href="mailto:bldg-sim-bounces@lists.onebuilding.org">bldg-sim-bounces@lists.onebuilding.org</a>
[<a class="moz-txt-link-freetext" href="mailto:bldg-sim-bounces@lists.onebuilding.org">mailto:bldg-sim-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Varkie
C Thomas<br>
<b>Sent:</b> 2009-03-03 18:26<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> [Bldg-sim] Percent Energy Savings</span><u1:p></u1:p><o:p></o:p></p>
<p class="MsoNormal" style="margin: 0in 0in 0pt;"><u1:p> </u1:p></p>
<p class="MsoPlainText" style="margin: 0in 0in 0pt;"><span
style="font-family: 'Calibri','sans-serif';">ASHRAE Std90 for the
baseline is already stringent and specifies the commonly used systems
& plants based on building type and size. Based on the CCGT
building, high percentage energy savings for LEED certification can be
achieved with low-rise buildings with a high exposure to floor surface
areas to locate PV panels, high but efficient glass to wall area for
day-lighting, the use of GSHP (which requires a large site area which
may not be available in city blocks), and low common energy consuming
systems in baseline and proposed which increases “percentage” energy
savings. <u1:p></u1:p></span><o:p></o:p></p>
<p class="MsoPlainText" style="margin: 0in 0in 0pt;"><span
style="font-family: 'Calibri','sans-serif';"><u1:p> </u1:p></span></p>
<p class="MsoPlainText" style="margin: 0in 0in 0pt;"><span
style="font-family: 'Calibri','sans-serif';">A school building is
low-rise, is low in process loads (increases % savings) and is high in
occupancy ventilation which allows for air-to-air heat recovery. It
operates only during the day increasing the impact of day-lighting. It
is closed in summer, reducing the annual cooling load and increases the
impact of solar heating during the rest of the year in cold climates.
So it is possible to achieve zero energy usage. <u1:p></u1:p></span><o:p></o:p></p>
<p class="MsoPlainText" style="margin: 0in 0in 0pt;"><span
style="font-family: 'Calibri','sans-serif';"><u1:p> </u1:p></span></p>
<p class="MsoPlainText" style="margin: 0in 0in 0pt;"><span
style="font-family: 'Calibri','sans-serif';">The choices are limited
in the case of inner city high-rise buildings. Today’s high-rise
office building design tries to maximize the glass percentage which
increases the impact of day-lighting. The glass could have PV
properties with a very small overall efficiency of converting light to
110V electricity. The ASHRAE Std90 baseline for Systems and Plants for
such a building is considered normal design. UFAD and other options
are not typical. The proposed envelope has to offset the 40%
Window-Wall-Ratio specified by ASHRAE.<u1:p></u1:p><span style=""> </span></span><span
style="color: rgb(192, 0, 0); font-family: 'Calibri','sans-serif';">If
the office building envelope is used for a hospital or hotel, which
operate 8760 hours/year, then the percent energy savings will go down.</span><span
style="font-family: 'Calibri','sans-serif';"><span style=""> </span><o:p></o:p></span></p>
<p class="MsoPlainText" style="margin: 0in 0in 0pt;"><span
style="font-family: 'Calibri','sans-serif';"><o:p> </o:p></span></p>
<p class="MsoPlainText" style="margin: 0in 0in 0pt;"><span
style="font-family: 'Calibri','sans-serif';"><u1:p></u1:p></span></p>
<p class="MsoPlainText" style="margin: 0in 0in 0pt;"><span
style="background: yellow none repeat scroll 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; font-family: 'Calibri','sans-serif';">High
percent energy savings does not therefore necessarily mean a better or
optimized designed building</span><span
style="font-family: 'Calibri','sans-serif';"> in terms of the client’s
interests. <span
style="background: yellow none repeat scroll 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;">Percent
energy savings should therefore not be the criteria for energy
efficient building design. It should be based on Energy Conservation
Measures (ECM) used for the given building that are more energy
efficient compared to ASHRAE Std90 for the given building type and size
which usually results in increased first costs.</span> The ECMs are
going to be different for different types of buildings in different
locations. If the ECM used is inappropriate, then the client pays a
price for the high percent energy savings.<u1:p></u1:p></span><o:p></o:p></p>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal" style="margin: 0in 0in 0pt;"><o:p> </o:p></p>
<p class="MsoNormal" style="margin: 0in 0in 0pt;"><span
style="color: rgb(192, 0, 0);">In my opinion the way to express energy
efficiency would be energy per unit area.<span style=""> </span>Occupancy
per unit area has to be defined for different types of buildings
(office, hotel, retail, hospital, etc.) and energy efficiency should
also take into account location based on HDD & CDD.<span style="">
</span>Energy per Person will account for overall energy efficiency
of buildings & transportation when designing sustainable townships.<o:p></o:p></span></p>
<pre wrap="">
<hr size="4" width="90%">
_______________________________________________
Bldg-sim mailing list
<a class="moz-txt-link-freetext" href="http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org</a>
To unsubscribe from this mailing list send a blank message to <a class="moz-txt-link-abbreviated" href="mailto:BLDG-SIM-UNSUBSCRIBE@ONEBUILDING.ORG">BLDG-SIM-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_telefonica_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>17</o:Revision>
<o:TotalTime>23</o:TotalTime>
<o:Created>2006-10-03T14:16:00Z</o:Created>
<o:LastSaved>2009-01-22T16:08:00Z</o:LastSaved>
<o:Pages>1</o:Pages>
<o:Words>22</o:Words>
<o:Characters>121</o:Characters>
<o:Company>AIGUASOL</o:Company>
<o:Lines>1</o:Lines>
<o:Paragraphs>1</o:Paragraphs>
<o:CharactersWithSpaces>142</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:AlwaysShowPlaceholderText>fal
se</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:0pt;
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:0pt;
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 85.05pt 70.85pt 85.05pt;
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:0pt 5.4pt 0pt 5.4pt;
mso-para-margin:0pt;
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:0pt 5.4pt 0pt 5.4pt;
mso-para-margin:0pt;
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="20482"/>
</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="ES-TRAD">Xavier García Casals</span></b><span
style="font-family: Arial;" lang="ES-TRAD"><o:p></o:p></span></pre>
<pre><span style="font-family: Arial;" lang="ES-TRAD"><o:p> </o:p></span></pre>
<pre><span class="SpellE"><span
style="font-size: 8pt; font-family: Arial;" lang="ES-TRAD">Tel</span></span><span
style="font-size: 8pt; font-family: Arial;" lang="ES-TRAD">: (+34) 91 843 19 85<o:p></o:p></span></pre>
<pre><span style="font-size: 8pt; font-family: Arial;" lang="ES-TRAD">Móvil: 660 22 94 45<o:p></o:p></span></pre>
<pre><span style="font-size: 8pt; font-family: Arial;" lang="ES-TRAD"><a
href="mailto:xgcasals@telefonica.net">xgcasals@telefonica.net</a><o:p></o:p></span></pre>
<pre><span class="MsoHyperlink"><span style="" lang="ES-TRAD"> </span><o:p></o:p></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>