<div>Ok, here they are.</div>
<div>The transversal IAM are provided for 0° (=1), 20° (=1.02), 40° (=1.03), 60° (=0.89), 90° (=0), whiIe the longitudinal IAM are provided for 0° (=1), 50° (=0.92), 90° (=0). </div>
<div>I have to add another information: I tried to use the same file .dat with Type71, setting 3 in parameter 10 [Number of longitudinal angles for which IAMs are provided] and 5 in parameter 11 [Number of transverse angles for which IAMs are provided] and it works. So, for this collector it seems the documentation is right, while with Type538 there is the problem I described in the other email.<br>
Maybe the simpliest explanation is that in Type538 parameter 11 should be named "Number of longitudinal angle" and parameter 12 "Number of transverse angle"...or maybe I'm making some mistake...</div>
<div>Thank you very much,</div>
<div>regards,</div>
<div>Giulio<br></div>
<div class="gmail_quote">2009/1/6 David Bradley <span dir="ltr"><<a href="mailto:bradley@tess-inc.com">bradley@tess-inc.com</a>></span><br>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div text="#000000" bgcolor="#ffffff">Giulio,<br> Could you please send me your project (*.tpf file) and your IAM file? I will try to find the cause of the error and then make sure that there is not a mistake in the documentation!<br>
Kind regards,<br> David<br><br><br>giulio betti wrote:
<blockquote type="cite">
<div>
<div></div>
<div class="Wj3C7c">
<div>dear all,</div>
<div>I'm using Type538 (TESS Solar Library, Evacueted tube collectors) at university. I have a problem with IAM: I read the posts about it on this mailing list and the chapter 5.11.14.4 of the Trnsys16 manual, so I think I've understood how to use it. I made the external data file needed by subroutine DYNAMICDATA as explained in the manual: </div>
<div><font face="Courier New" size="1">
<p align="left"><font size="2"><Transversal angle 1> <Transversal angle 2> etc. Nt values [0;90]</font></p>
<p align="left"><font size="2"><Longitudinal angle 1> <Longitudinal angle 1> etc. Nl values [0;90]</font></p>
<p align="left"><font size="2"><IAM 1 1> IAM for transv. angle 1, long. angle 1</font></p>
<p align="left"><font size="2"><IAM 1 2> IAM for transv. Angle 1, long. angle 2</font></p>
<p align="left"><font size="2">...</font></p>
<p align="left"><font size="2"><IAM 1 Nl> IAM for transv. angle 1, long. angle Nl</font></p>
<p align="left"><font size="2"><IAM 2 1> IAM for transv. angle 2, long. angle 1</font></p>
<p align="left"><font size="2"><IAM 2 2> IAM for transv. angle 2, long. angle 2</font></p>
<p align="left"><font size="2">...</font></p>
<p align="left"><font size="2"><IAM 2 Nl> IAM for transv. angle 2, long. angle Nl</font></p>
<p align="left"><font size="2"><IAM 3 1> IAM for transv. angle 3, long. angle 1</font></p>
<p align="left"><font size="2">...</font></p>
<p><font size="2"><IAM Nt Nl> IAM for transv. angle Nt, long. angle Nl</font></p>
<p><font size="2">Having 5 transversal angles [0°, 20°, 50°, 70°, 90°] and 3 longitudinal angles [0°, 50°, 90°] my file .dat is something like this (I don't write all 15 values of the column):</font></p>
<p><font size="2">0 20 50 70 90</font></p>
<p><font size="2">0 50 90</font></p>
<p><font size="2">1</font></p>
<p><font size="2">0.95</font></p>
<p><font size="2">0</font></p>
<p><font size="2">.</font></p>
<p><font size="2">.</font></p>
<p><font size="2">.</font></p>
<p><font size="2">0</font></p>
<p><font size="2">In Type538 I set parameter 11 (Number of transverse angles) to 5 and parameter 12 (Number of longitudinal angles) to 3. Now, I tried to run the simulation: Trnsys didn't work: it said that there was an error without specifing details:</font></p>
<p><font size="2">Fatal Error at time : 3245.010000<br> Generated by Unit : 3<br> Generated by Type : 538<br> TRNSYS Message 109 : Error reading data stored in logical unit. NOTE: the reported logical unit number may be automatically or internally ASSIGNed, or you may have specified the incorrect number of independent variables.<br>
Reported information : Logical Unit number 33<br></font> </p>
<p><font size="2">So I tried to change parameter 11 and parameter 12: I set parameter 11 to 3 and parameter 12 to 5 (I simply reversed the number of transversal angles with the number of longitudinal angles). In this way the simulation ran!</font></p>
<p><font size="2">So the question is this: the file .dat has to be written as described in the manual, and there is only an inversion in the definitions of "parameter 11" and "parameter 12", so that the only change to do is the one described above?</font></p>
<p><font size="2">Or the definitions of "parameter 11" and "parameter 12" are right and there is to change the file .dat putting in the first line the longitudinal angles and in the second line the transversal angles? In this case, the column with all the possible multiplications is to be left as it is described in the manual, or I have to modify it in this way:</font></p>
<font size="2">
<p align="left"><IAM 1 1> IAM for long. angle 1, transv. angle 1</p>
<p align="left"><IAM 1 2> IAM for long. Angle 1, transv. angle 2</p>
<p align="left">...</p>
<p align="left"><IAM 1 Nl> IAM for long. angle 1, transv. angle Nl</p>
<p align="left"><IAM 2 1> IAM for long. angle 2, transv. angle 1</p>
<p align="left"><IAM 2 2> IAM for long. angle 2, transv. angle 2</p>
<p align="left">...</p>
<p align="left"><IAM 2 Nl> IAM for long. angle 2, transv. angle Nl</p>
<p align="left"><IAM 3 1> IAM for long. angle 3, transv. angle 1</p>
<p align="left">...</p>
<p><IAM Nt Nl> IAM for long. angle Nt, transv. angle Nl</p>
<p>? </p></font>
<p><font size="2">I hope I've been clear enough, thank you all,</font></p>
<p><font size="2">regards,</font></p>
<p><font size="2">Giulio Betti</font></p></font></div></div></div><pre><hr width="90%" size="4">
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