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<div class="moz-cite-prefix">Dear Mike,<br>
<br>
The PCM model you would like to use is the simple one (without
overcooling or overheating)<br>
but with the linear function of latent heat flux versus
temperature. Melting temperature should<br>
be lower than solidification. The difference is the phase change
temperature range.<br>
Specific heat is taken for solid phase. Members a and b is the
constants of linear function:<br>
y=ax+b.<br>
<br>
Alternatively, you can use a simpler model where latent heat flux
is constant versus temperature.<br>
Then, you need to know only latent heat and both temperature.<br>
<br>
Please see also:<br>
<a class="moz-txt-link-freetext" href="http://www.ibpsa.org/proceedings/BS2005/BS05_0397_402.pdf">http://www.ibpsa.org/proceedings/BS2005/BS05_0397_402.pdf</a><br>
<br>
Kind regards,<br>
Darek<br>
<br>
W dniu 2013-07-18 17:17, Mike Whalley pisze:<br>
</div>
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<p class="MsoNormal">Hi to All<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’d like to get some help modelling PCM in
the active materials section of Special Components in esp-r.
In particular I’d like to make sure that I understand the
inputs:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Melting temperature – the temperature at
which the solid PCM begins to melt. I’d expect this to be
lower than the solidification temperature<o:p></o:p></p>
<p class="MsoNormal">Solidification temperature – the
temperature at which the liquid PCM begins to freeze. I’d
expect this to be higher than the melting temperature.<o:p></o:p></p>
<p class="MsoNormal">Conductivity in solid phase – self
explanatory<o:p></o:p></p>
<p class="MsoNormal">Conductivity in liquid phase – self
explanatory<o:p></o:p></p>
<p class="MsoNormal">Specific heat – is this taken at solid or
liquid phase.<o:p></o:p></p>
<p class="MsoNormal">Latent heat member a, latent heat member b
– I’m not sure what are members a and b<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Do the properties above apply to the PCM or
to the complete compound, ie if PCM is encapsulated 50/50 in
wallboard are the wallboard properties entered as normal in
the materials database and the PCM properties in the special
components file?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any help would be much appreciated<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#0F243E;mso-fareast-language:EN-GB">Mike
Whalley </span></b><b><span
style="font-size:8.0pt;font-family:"Arial","sans-serif";color:#0F243E;mso-fareast-language:EN-GB">CEng
MCIBSE</span></b><b><span
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<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#0F243E;mso-fareast-language:EN-GB">Building
Performance Analysis Limited<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span
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