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Karol,<br>
I hope someone will correct me if I am wrong in this but I don't
think that there is a significant decay rate in your case. I have
used those decay rates only when there is something such as a
chemical reaction. I have usually treated absorption of the
contaminant as a sink (like plants absorbing the CO2)<br>
Best,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 2/24/2014 11:03, Karol Bandurski
wrote:<br>
</div>
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<div class="WordSection1">
<p class="MsoNormal">Dear All,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I would like to model CO2 concentration in
such situation:<o:p></o:p></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="mso-list:Ignore">-<span style="font:7.0pt "Times
New Roman""> </span></span><!--[endif]-->Single
family house (wooden),<o:p></o:p></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="mso-list:Ignore">-<span style="font:7.0pt "Times
New Roman""> </span></span><!--[endif]-->Outside
concentration: 350 ppm (constant),<o:p></o:p></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="mso-list:Ignore">-<span style="font:7.0pt "Times
New Roman""> </span></span><!--[endif]-->Initial
inside concentration: 700 ppm,<o:p></o:p></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="mso-list:Ignore">-<span style="font:7.0pt "Times
New Roman""> </span></span><!--[endif]-->No
sources, no sinks,<o:p></o:p></p>
<p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="mso-list:Ignore">-<span style="font:7.0pt "Times
New Roman""> </span></span><!--[endif]-->Air
node connection are defined (between thermal and external air
nodes).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I defined CO2 with molar mass 44.01
kg/kmol, and I put 0.0007 kg/kg CO2 in each zone.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">But what value of decay (contaminant
definition and zone definition) should I use???<o:p></o:p></p>
<p class="MsoNormal">What does it depend on? <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Karol<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">-----------------------------------------<o:p></o:p></p>
<p class="MsoNormal">mgr inż. Karol Bandurski<o:p></o:p></p>
<p class="MsoNormal">Instytut Inżynierii Środowiska<o:p></o:p></p>
<p class="MsoNormal">Politechnika Poznańska<o:p></o:p></p>
<p class="MsoNormal"><span style="background:white" lang="PL"><a
moz-do-not-send="true"
href="http://www.put.poznan.pl/%7Ekarol.bandurski"><span
style="color:blue" lang="EN-US">www.put.poznan.pl/~karol.bandurski</span></a></span><span
style="background:white"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="PL"><a moz-do-not-send="true"
href="www.ee.put.poznan.pl"><span style="color:blue">www.ee.put.poznan.pl</span></a></span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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Principal
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