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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hi Harakhlaal, <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'>I’m not sure whether I can provide any clear answers, but I
am quite curious to see the answer to your question.<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'>I recall discussing adiabatic heating/cooling in my
thermodynamics courses… it’s basically the concept of raising/lowering
temperatures without adding or removing heat, but instead rather through
changes in fluid volume/pressure, right?  A real-world example of
something akin to this might be a spraypaint can getting cold as you release its
pressurized contents.<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'>If that’s the case, I’m struggling to understand why
you might wish to model such behavior within a building energy simulation…
kinda sounds hazardous to the health of the occupants =)!  <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'>Would you please describe your purpose a bit further?  Is there
a specific system/situation you are trying to model?  This may help others
help you determine a more appropriate tool-of-choice.  As a guess, are you
possibly trying to account for cooling in a space due to a pressurized tank
undergoing adiabatic cooling as it releases gas into another system?<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'>Back to fundamentals, and something I’d like to ask of
those more knowledgeable… I know for certain in DOE2.2/eQuest you can set
up a space with a set volume and with adiabatic (or no) surfaces – which will
account for preventing heat transfer, but I have not been exposed to DOE2.2/eQuest
varying the space pressure/volume over time, so I would concur that this might
not be possible in a literal sense… is this the case?<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'>~Nick  <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'><o:p> </o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><img width=119 height=37 id="Picture_x0020_1"
src="cid:image001.jpg@01CACC19.28491F90" alt="cid:489575314@22072009-0ABB"></span><b><span
style='font-size:11.0pt;font-family:"Stylus BT","sans-serif";color:#2D4D5E'><o:p></o:p></span></b></p>

<p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Stylus BT","sans-serif";
color:#2D4D5E'><o:p> </o:p></span></b></p>

<p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Stylus BT","sans-serif";
color:#2D4D5E'>NICK CATON, E.I.T.</span></b><b><span style='font-family:"Stylus BT","sans-serif";
color:#2D4D5E'><o:p></o:p></span></b></p>

<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Calibri","sans-serif";
color:#CC9900'>PROJECT ENGINEER</span><span style='font-size:7.5pt;color:#CC9900'><o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>25501 west valley parkway<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>olathe ks 66061<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>direct 913 344.0036<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>fax 913 345.0617<o:p></o:p></span></p>

<p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#2D4D5E'>Check out our new web-site @ </span></i><span style='font-size:
11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a
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style='font-size:10.0pt'>www.smithboucher.com</span></a></span><u><span
style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:blue'> </span></u><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>

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<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"'>
bldg-sim-bounces@lists.onebuilding.org [mailto:bldg-sim-bounces@lists.onebuilding.org]
<b>On Behalf Of </b>Vikram Sami<br>
<b>Sent:</b> Thursday, March 25, 2010 12:22 PM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org; Harakhlaal<br>
<b>Subject:</b> Re: [Bldg-sim] adiabatic cooling<o:p></o:p></span></p>

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<p class=MsoNormal><o:p> </o:p></p>

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  <p class=MsoNormal>When you say adiabatic cooling are you talking about
  evaporative cooling or something else?<br>
  <br>
  --- On <b>Thu, 3/25/10, Harakhlaal <i><harakhlaal@gmail.com></i></b>
  wrote:<o:p></o:p></p>
  <p class=MsoNormal style='margin-bottom:12.0pt'><br>
  From: Harakhlaal <harakhlaal@gmail.com><br>
  Subject: [Bldg-sim] adiabatic cooling<br>
  To: bldg-sim@lists.onebuilding.org<br>
  Date: Thursday, March 25, 2010, 9:00 AM<o:p></o:p></p>
  <div id=yiv401019698>
  <p class=MsoNormal><br>
  ADIABATIC COOLING<br>
  <br>
  Seems to me there is no way to simulate adiabatic cooling in eQuest.<br>
  <br>
  Maybe I need to use EnergyPlus or TRNSYS for this purpose.<br>
  <br>
  Perhaps someone knows otherwise.<o:p></o:p></p>
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  -----Inline Attachment Follows-----<o:p></o:p></p>
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