<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div>Dear Trnsys Users,<br></div><div><br data-mce-bogus="1"></div><div>I would like to program my Water-In-Glass Evacuated Tube Solar Collector. <br data-mce-bogus="1"></div><div>My idea was to start from the existing Type71 but I am stuck because i can't understand how the 'Fprime_function' works. I searched online, on the Programmers Guide and in the TrnsysFunctions.f90 but still, I don't understand. <br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div> <!--StartFragment-->Can anyone know any references to help me ?<!--EndFragment--> </div><div><br data-mce-bogus="1"></div><div>Moreover, someone might already program an Water-In-Glass ETC, i would be happy if you have any advise or program to share.</div><div><br data-mce-bogus="1"></div><div> <!--StartFragment-->Best regards,<!--EndFragment--> </div><div><br></div><div data-marker="__SIG_POST__">-- <br></div><div><div><strong>Julien GAMBADE</strong><br><strong>Doctorant</strong><br>Institut de Recherche Dupuy de Lôme (UMR CNRS 6027)<br>Centre de recherche Christian Huygens<br>Rue de Saint-Maudé - 56100 Lorient - France<br>julien.gambade@univ-ubs.fr<br><a href="http://www.irdl.fr" target="_blank">www.irdl.fr</a><br></div><div><img class="aligncenter wp-image-3793 size-medium" src="https://irdl.fr/wp-content/uploads/2016/03/IRDL-LOGOTYPE-COULEURSCNRS-300x192.jpg" alt="" style="float: left;" width="300" height="192"></div></div></div></body></html>