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<title>RE : [Bldg-sim] Infiltration effect in Climate 1</title>
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Dear Gents,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I work in empirical validation research using
an Australian software which I believe is very similar in many aspects to
EneryPlus.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>In the Australian software the infiltration
rate is informed by the:<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'><span style='mso-list:Ignore'>-<font size=1 face="Times New Roman"><span
style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'>wind speed
data fro the climate file<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'><span style='mso-list:Ignore'>-<font size=1 face="Times New Roman"><span
style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'>The
nominated terrain category and a <o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'><span style='mso-list:Ignore'>-<font size=1 face="Times New Roman"><span
style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'>Default
constant value regardless of wind speed<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><img width=291 height=122 id="_x0000_i1026"
src="cid:image002.gif@01CC51E8.CB253EA0"> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I have some research which has linked
variations between simulation and measured room temperatures and infiltration
calcul;ations. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>This is totally separate to the Natural Ventilation
Model, which includes aperture opening size, wind speed, terrain category, etc<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>This is an area which we have some concern
with and requires further empirical validation. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>Mark Dewsbury<br>
<br>
Residential <st1:place w:st="on"><st1:PlaceName w:st="on">Thermal</st1:PlaceName>
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<font size=3 face="Times New Roman"><span style='font-size:12.0pt;font-family:
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<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
Genest, Frederic [mailto:fgenest@pageaumorel.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, 2 August 2011 11:03
AM<br>
<b><span style='font-weight:bold'>To:</span></b> ROBERT GOMEZ;
bldg-sim@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Bldg-sim] RE :
Infiltration effect in Climate 1</span></font><span lang=EN-US><o:p></o:p></span></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p style='margin-bottom:12.0pt'><font size=2 face="Times New Roman"><span
style='font-size:10.0pt'>Hello Richard.<br>
<br>
I'm not used to eQuest, but since it is using DOE in the background, same as
EE4 I'm using more frequently, I'll try to answer correctly.<br>
<br>
Climate Zone has nothing to do with infiltration rates, except when in comes to
wind speed and such. However, I don't think DOE is considering wind speed when
calculating infiltration rates; it is usually defined as a constant, based on a
value such as ACH or cfm/ft.sq. of wall area.<br>
<br>
As such, I would start to check your infiltration inputs to see what is
defined, first in eQuest and then in the DOE input file. I'm pretty sure you'll
find your answer somewhere there.<br>
<br>
Also note that design infiltration rate and "actual, under operating
conditions" infiltration rate, are two different things. The average
constant infiltration rate is adequate enough for the later one.<br>
<br>
Also, if you ever need to model a real infiltration from blower door test
results, I personnaly use the 50 Pa value divided by 20 for actual, normal
operation conditions, while the 75 Pa value would be divided by 35 (in whatever
units those values are provided).<br>
<br>
Regards.<br>
<br>
<br>
<br>
Frederic Genest, ing., M.Sc.A.<br>
LEED AP, ASHRAE HBDP<br>
fgenest@pageaumorel.com<br>
<br>
Pageau Morel et associés<br>
210 Cremazie Ouest, suite 110<br>
Montréal, Qc H2P 1C6<br>
T) 514-382-5150
begin_of_the_skype_highlighting 514-382-5150 end_of_the_skype_highlighting
begin_of_the_skype_highlighting 514-382-5150 end_of_the_skype_highlighting
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www.pageaumorel.com<br>
<br>
<br>
-------- Message d'origine--------<br>
De: ROBERT GOMEZ [<a href="mailto:rsg4999@yahoo.com">mailto:rsg4999@yahoo.com</a>]<br>
Date: dim. 31/07/2011 23:05<br>
À: bldg-sim@lists.onebuilding.org<br>
Objet : [Bldg-sim] Infiltration effect in Climate 1<br>
<br>
Hello all,<br>
<br>
I'm currently involved in a project that is located in International
Climate Zone 1 (Very Hot - Humid). The building has no heating system, HVAC
systems are only for cooling. Infiltration effect is smaller than I
expected from the eQuest energy model result. I know it has something
to do with the climate. Can anyone tell me the reason why?<br>
<br>
Thanks in advance!<br>
<br>
<br>
Richard Gulli<br>
Project Engineer</span></font><o:p></o:p></p>
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