<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Ahmad,</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">The models are different in 3 primary ways:</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">1) 538 has the ability to consider the mass of the collector. </div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">2) 538 has a more rigorous solution algorithm that gives much better solutions at low flow rates, low solar radiation, etc.</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">3) 538 allows you to put the collector in temperature seeking mode and specify a desired output temperature from the collector.</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">Jeff <br><br>Sent from my iPhone</div><div><br>On May 5, 2017, at 2:56 PM, ahmad abbasian <<a href="mailto:ahmadabbasiansbu@outlook.com">ahmadabbasiansbu@outlook.com</a>> wrote:<br><br></div><blockquote type="cite"><div>
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<p>Dear Sir</p>
<p>I don't have TESS library now, I need this document to compare with evacuated tube type of standard TRNSYS library to see the differences and to learn more.</p>
<p>Thank you</p>
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Ahmad abbasianzadeh</div>
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Solar energy Researcher</div>
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<b>Harrisburg, Pensylvania</b></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> TRNSYS-users <<a href="mailto:trnsys-users-bounces@lists.onebuilding.org">trnsys-users-bounces@lists.onebuilding.org</a>> on behalf of Jeff Thornton via TRNSYS-users <<a href="mailto:trnsys-users@lists.onebuilding.org">trnsys-users@lists.onebuilding.org</a>><br>
<b>Sent:</b> Friday, May 5, 2017 7:48:09 AM<br>
<b>To:</b> <a href="mailto:trnsys-users@lists.onebuilding.org">trnsys-users@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [TRNSYS-users] I need type 538 documentation</font>
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<p>If you have purchased the libraries you'll already have the documentation. .\Tess Models\Documentation\10-SolarLibraryMathematicalReference.pdf</p>
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<pre>---<br>Jeff Thornton
President - TESS LLC
22 N. Carroll Street, Madison WI USA 53703
Office: (608) 274-2577 Fax: (608) 278-1475
<a href="http://www.tess-inc.com">www.tess-inc.com</a>
E-Mail: <a href="mailto:thornton@tess-inc.com">thornton@tess-inc.com</a>
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<p>On 05/05/2017 12:33 pm, ahmad abbasian via TRNSYS-users wrote:</p>
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<p>Hello</p>
<p>Could anyone send me the mathematical modeling of type538 please? (evacuated tube solar collector-TESS-solar library)</p>
<p>Thank you</p>
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Ahmad abbasianzadeh</div>
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Solar energy Researcher</div>
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<strong>Harrisburg, Pensylvania</strong></div>
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