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<p class=MsoNormal>Dear All,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I was wondering if anyone has previously used Type 569 as a
PVT collector (with water flowing through the channels instead of air)?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>If so, did anyone make validation attempts?<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal>I am planning to model a rectangular flow unglazed polymer
PVT solar collector.<o:p></o:p></p>
<p class=MsoNormal>Most model rely on the fin-type system. In our case, we will
have rectangular flow channels. <o:p></o:p></p>
<p class=MsoNormal>Type 569 just has one channel, defined by collector
width,length, and channel height, if I understand correctly.<o:p></o:p></p>
<p class=MsoNormal>My aim is to have loads of small channels, instead of just
one, so I probably will have to make some modifications (higher pressure drop,
higher velocities, turbulent HT, etc. …)<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Is there another Type out there, that might better suit my
needs?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Of particular interest is the wind velocity dependency, and
how this is included in the efficiency calculations.<o:p></o:p></p>
<p class=MsoNormal>I researched a lot about the specific importance of wind
speed’s influence on top loss for unglazed collectors (e.g. see NREL’s
paper on testing <a href="http://www.nrel.gov/docs/fy09osti/45466.pdf">http://www.nrel.gov/docs/fy09osti/45466.pdf</a>
, publications of Vajen et. Al in NEGST tasks) .<o:p></o:p></p>
<p class=MsoNormal>Is that sufficiently implemented in Type569. Without having
had an in-depth look at the code, I don’t think so.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Would be glad for any kind of input!!<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Best,<o:p></o:p></p>
<p class=MsoNormal>Philip<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='color:black'>Philip Horn</span></b><span
style='color:black'><br>
<b>Fraunhofer Center for Sustainable Energy Systems CSE</b><br>
25 First Street</span><o:p></o:p></p>
<p class=MsoNormal><span style='color:black'>Cambridge, MA 02141, U.S.A.<br>
+1 617-575 7250 x139<br>
</span><span style='font-size:8.5pt;font-family:"Arial","sans-serif";
color:black'><a href="mailto:astokes@fraunhofer.org"><span style='color:blue'>phorn@fraunhofer.org</span></a><br>
</span><span style='color:#1F497D'><a href="http://cse.fraunhofer.org/"><span
style='font-size:8.5pt;font-family:"Arial","sans-serif";color:blue'>http://cse.fraunhofer.org/</span></a></span><span
style='font-size:8.5pt;font-family:"Arial","sans-serif";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='color:black'><br>
The contents of this email and any files or attachments transmitted with it,
unless otherwise indicated, are confidential and/or privileged. The
recipient may not use this message and any attachment for other than its
intended purpose.<o:p></o:p></span></p>
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