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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">Hello Saja,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">Make sure your flat plate collector is facing the equator. If this input is incorrect and the collector is due north, the useful
energy will increase as the collector slope decreases.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">Hope this helps.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US">Regards,<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:10.0pt;font-family:"Lucida Calligraphy";color:#1F497D">Sleiman Farah<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Lucida Calligraphy";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><b><i><span style="font-size:18.0pt;font-family:Webdings;color:green">P</span></i></b><b><i><span style="font-size:18.0pt;font-family:"Arial","sans-serif";color:green">
</span></i></b><b><i><u><span style="font-size:8.0pt;font-family:"Arial","sans-serif";color:green">please consider the environment before printing this email</span></u></i></b><b><span style="font-size:10.0pt;font-family:"Arial Narrow","sans-serif";color:navy"><o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""> trnsys-users-bounces@cae.wisc.edu [mailto:trnsys-users-bounces@cae.wisc.edu]
<b>On Behalf Of </b>saja al-rifai<br>
<b>Sent:</b> Friday, 23 May 2014 11:31 PM<br>
<b>To:</b> TRNSYS-users@cae.wisc.edu<br>
<b>Subject:</b> Re: [TRNSYS-users] solar collector<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" style="background:white"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Hello,<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">I need to answer this question please....<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">I'm simulating different types of solar collector. I want to investigate the effect of collector slope on useful energy. When I increase the collector slope of
flat plate collector type 1b, the useful energy from collector decreased and the maximum useful energy occurred at 0 deg angle (horizontal), even though the latitude for my region 32 deg, which meaning the useful energy should be increase and not decrease
at angles near the latitude angle .<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">but when I used the evacuated tube type 71, the useful energy increased with angle.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">I returned to the TRNSYS mathematical reference, flat plate and evacuated tube collectors used the same thermal model and different IAM model. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">in case of flat plate collectors the IAM for both sky and diffuse radiation depends on the collector slope, if collector slope increase the effective sky and
diffuse angle decrease, resulted in decrease the IAM, collector efficiency and useful energy. these results according to TRNSYS mathematical description.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"> practically, the useful energy should be increase for flat plate as evacuated tube when the collector slope increase. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">does someone have an idea about this issue? <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">saja<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">On Wednesday, May 21, 2014 2:01 PM, saja al-rifai <<a href="mailto:srhihi2003@yahoo.com">srhihi2003@yahoo.com</a>> wrote:</span><span style="font-family:"Helvetica","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-family:"Helvetica","sans-serif";color:black"><o:p> </o:p></span></p>
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<div id="yiv4205167476">
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Hello,<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">I'm simulating different types of solar collector. I want to investigate the effect of collector slope on useful energy. but if I increase the collector slope
when I use the flat plate collector type 1b, the useful energy from collector decreased and the maximum useful energy occurred at 0 deg angle (horizontal), even though the latitude for my region 32 deg, which meaning the useful energy should be increase and
not decrease at angles near the latitude angle .<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">but when I used the evacuated tube type 71, the useful energy increased with angle.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">I returned to the TRNSYS mathematical reference, flat plate and evacuated tube collectors used the same thermal model and different IAM model. <o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">in case of flat plate collectors the IAM for both sky and diffuse radiation depends on the collector slope, if collector slope increase the effective sky and
diffuse angle decrease, resulted in decrease the IAM, collector efficiency and useful energy. these results according to TRNSYS mathematical description.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"> practically, the useful energy should be increase for flat plate as evacuated tube if the collector slope increase. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">does someone have an idea about this issue? <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">saja<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"> <o:p></o:p></span></p>
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