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</o:shapelayout></xml><![endif]--></head><body lang=SV link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Jeff<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 lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thank you for replying. I have identified the problem. It was the pump heat loss to the fluid stream which accounted for the difference between the output from the collector and my calculations.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>A typical newbie mistake I guess.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US 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'>Best regards<o:p></o:p></span></p><div><p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Richard Thygesen<o:p></o:p></span></b></p></div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Från:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Jeff Thornton [mailto:thornton@tess-inc.com] <br><b>Skickat:</b> den 31 juli 2012 18:33<br><b>Till:</b> trnsys-users@cae.wisc.edu<br><b>Ämne:</b> Re: [TRNSYS-users] Type 539 solar collector useful energy gain<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p>Richard,<o:p></o:p></p><p> <o:p></o:p></p><p>I just dragged out Type 539, connected it to a TMY-3 weather file and ran it for a month. The results from the model exactly match the results from the Qu=Mdot*Cp*(Tout-Tin) equation to the 12th decimal. Check to make sure you have the same specific heat in both, have the correct connections etc. If you are still running into issues then send the project to your distributor for a closer look.<o:p></o:p></p><p> <o:p></o:p></p><p>Jeff<o:p></o:p></p><p> <o:p></o:p></p><div><pre>---<o:p></o:p></pre><p>Jeff Thornton<o:p></o:p></p><p><em>President - TESS LLC</em><o:p></o:p></p><p><em>22 N. Carroll Street, Madison WI USA 53703</em><o:p></o:p></p><p><em>Office: (608) 274-2577 Fax: (608) 278-1475</em><o:p></o:p></p><p><em><a href="http://www.tess-inc.com"><span style='font-style:normal'>www.tess-inc.com</span></a></em><o:p></o:p></p><p><em>E-Mail: <a href="mailto:thornton@tess-inc.com"><span style='font-style:normal'>thornton@tess-inc.com</span></a></em><o:p></o:p></p><p> <o:p></o:p></p></div><p>On 07/31/2012 8:33 am, Richard Thygesen wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #1010FF 1.5pt;padding:0cm 0cm 0cm 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I have a question about type 539 solar collector.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>When I compare the output useful energy gain with my own calculation it doesen’t match. <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Why is that and shouldn’t the useful energy gain be the same as my calculation?<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I have used the following q=massflow*Cp*(Tout-Tin) to calculate the useful energy.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Best regards<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><strong><span style='font-size:9.0pt;font-family:"Arial","sans-serif"'>Richard Thygesen</span></strong><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></blockquote></div></body></html>