<div dir="ltr">Hello Jeremy<div><br></div><div>Thank you for your reply.</div><div>That would be great. Just let me know at what time exactly we can meet.</div><div><br></div><div>I was actually trying to do that but it seems much more difficult than i expected as what i know about compiling FORTRAN scripts is the same as what i know about quantum physics i.e. almots nothing.</div>
<div>If you have time can you send me simple steps explaining how to compile the FORTRAN script after modifying it? And are you aware of a free FORTRAN compiler for windows 7?</div><div><br></div><div>I have actually tried to avoid type 194 as it is very complicated and it needs some parameters that are not easy to get. But i will have a look.</div>
<div><br></div><div>Thank you</div><div>Regards,</div><div>Amir</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Sat, Apr 26, 2014 at 10:03 AM, Jeremy Osborne <span dir="ltr"><<a href="mailto:jeremy.osborne@solem-consulting.com" target="_blank">jeremy.osborne@solem-consulting.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor="white" lang="EN-GB" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Hi Amir,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">To follow up on David’s email. I will be out on your campus next week (likely Friday) for a training session. Potentially go through it is in person. <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Interim solutions: Do you have a FORTRAN compiler? The developers are investigating a fix however I have found that being able edit the FORTRAN behind the type to make them suit your needs is very useful. You could update the FORTRAN and recompile yourself. See the programmers guide user manual. We could run through this next week if you’re not familiar. <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Otherwise, have you looked at TYPE 194? Does this have the same errors? <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Cheers,<br>
Jeremy <u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext"> David BRADLEY [mailto:<a href="mailto:d.bradley@tess-inc.com" target="_blank">d.bradley@tess-inc.com</a>] <br>
<b>Sent:</b> Saturday, 26 April 2014 12:19 AM<br><b>To:</b> TRNSYS users mailing list at the Solar Energy Lab, UW-Madison; <a href="mailto:nashed.amir@gmail.com" target="_blank">nashed.amir@gmail.com</a><br><b>Subject:</b> Re: [TRNSYS-users] Potential Bugs with Type94a<u></u><u></u></span></p>
</div></div><div><div class="h5"><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal" style="margin-bottom:12.0pt">Amir,<br> Thank you for the detailed email. We are looking into Type94 and will let you know what we discover.<br>
Best,<br> David<br><br><br><u></u><u></u></p><div><p class="MsoNormal">On 4/25/2014 00:12, Amir Nashed wrote:<u></u><u></u></p></div><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><div><p class="MsoNormal">Hello <u></u><u></u></p>
<div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">I previously sent 2 emails regarding potential bugs in Type94a (PV 4 parameters model) and i can conclude the following:<u></u><u></u></p></div>
<div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">1-</span><span style="font-size:7.0pt"> </span><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">The equation used to calculate the IAM has a wrong sign in the third term (should be -6.26E-6 rather than +6.26E-6) (this error actually in some cases made the IAM to be larger than 1 which is incorrect as far as I know)</span><u></u><u></u></p>
</div><p><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">2-</span><span style="font-size:7.0pt"> </span><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">The last term in the equation used to calculate the IAM in the manual is 1.4<span style="background:yellow">2</span>72E-8 while in the code is 1.472E-8<u></u><u></u></span></p>
<p><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">3-</span><span style="font-size:7.0pt"> </span><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Different equations than those indicated in the manual are used to calculate the effective angle of sky diffuse and ground diffuse radiation<u></u><u></u></span></p>
<p><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">4-</span><span style="font-size:7.0pt"> </span><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">The variable SUNGND (surface ground diffuse radiation) is not calculated anywhere in the code and it is not one of the inputs <u></u><u></u></span></p>
<p><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">5-</span><span style="font-size:7.0pt"> </span><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">The reference efficiency EFFREF does not account for the module surface area so I believe it should equal: Vm*Im/SUNR*Area instead of Vm*Im/SUNR<u></u><u></u></span></p>
<p><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">6-</span><span style="font-size:7.0pt"> </span><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Equation 5.2.5-21 used to calculate the cell temperature in the manual (page 74) I believe is incorrect [It should be UL*(Tc-Ta)=TAU_Alpha*Gt*(1-Eff/TAU_Alpha) thus Tc=Ta+ TAU_Alpha*Gt*(1-Eff/TAU_Alpha)/UL ] (The equation is however applied correctly in Type94 code script)<u></u><u></u></span></p>
<p><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">7- Finally, I found out why Type94a overestimates the IAM losses (when the option is activated). This is because the SUN variable, (Effective global tilted irradiance) is calculated after multiplying each irradiance component IAM multiplier (i.e. TADIR, TAGND, TADIFF) by TAMAX (TAU-ALPHA at normal incidence), which i believe is incorrect as the IL at reference conditions already includes the effect of TAU-ALPHA at normal incidence. This error is however corrected when the IAM mode is disabled where the SUN variable is not multiplied by TAMAX<u></u><u></u></span></p>
<p><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u> <u></u></span></p><p><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> could someone confirm the aforementioned bugs?<u></u><u></u></span></p>
<p><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><u></u> <u></u></span></p><p><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Thank you<u></u><u></u></span></p>
<p><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Regards,<u></u><u></u></span></p><p><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Amir<u></u><u></u></span></p>
</div><p class="MsoNormal"><br><br><br><u></u><u></u></p><pre>_______________________________________________<u></u><u></u></pre><pre>TRNSYS-users mailing list<u></u><u></u></pre><pre><a href="mailto:TRNSYS-users@cae.wisc.edu" target="_blank">TRNSYS-users@cae.wisc.edu</a><u></u><u></u></pre>
<pre><a href="https://mailman.cae.wisc.edu/listinfo/trnsys-users" target="_blank">https://mailman.cae.wisc.edu/listinfo/trnsys-users</a><u></u><u></u></pre></blockquote><p class="MsoNormal"><br><br><u></u><u></u></p><pre>
-- <u></u><u></u></pre><pre>***************************<u></u><u></u></pre><pre>David BRADLEY<u></u><u></u></pre><pre>Principal<u></u><u></u></pre><pre>Thermal Energy Systems Specialists, LLC<u></u><u></u></pre><pre>22 North Carroll Street - suite 370<u></u><u></u></pre>
<pre>Madison, WI 53703 USA<u></u><u></u></pre><pre><u></u> <u></u></pre><pre>P:<a href="tel:%2B1.608.274.2577" value="+16082742577" target="_blank">+1.608.274.2577</a><u></u><u></u></pre><pre>F:<a href="tel:%2B1.608.278.1475" value="+16082781475" target="_blank">+1.608.278.1475</a><u></u><u></u></pre>
<pre><a href="mailto:d.bradley@tess-inc.com" target="_blank">d.bradley@tess-inc.com</a><u></u><u></u></pre><pre><u></u> <u></u></pre><pre><a href="http://www.tess-inc.com" target="_blank">http://www.tess-inc.com</a><u></u><u></u></pre>
<pre><a href="http://www.trnsys.com" target="_blank">http://www.trnsys.com</a><u></u><u></u></pre></div></div></div></div></blockquote></div><br></div>