<div dir="ltr">Hi Rami,<div>Thanks for your answer, but that just reduces the efficiency a little bit to 58%.</div><div><div style="font-size:12.8px">- total radiation on tilted surface: 1,93 MWh/m²/year </div><div style="font-size:12.8px">- useful energy gain by collectors: 1,12 MWh/m²/year </div></div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">I don't know where is the problem I have checked the parameters units and looks correct, Maybe I am not using the right solar collector, but what I would like to simulate is a normal plate collector surface without movement, always with the same slope.</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">Looking forward for solving it.</div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>---<br>Jordi Jové Manonelles<br></div><i><a href="mailto:jovejm@gmail.com" target="_blank">jovejm@gmail.com</a></i><br></div></div></div>
<br><div class="gmail_quote">2016-07-25 13:51 GMT+02:00 Rami Al-Assad <span dir="ltr"><<a href="mailto:ramianton@gmail.com" target="_blank">ramianton@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Jordi,<div><br></div><div>I think the problem related to Type 1b as you connect the</div><span class=""><div><span style="font-size:12.8px">Ground reflected diffuse radiation on horizontal --> Ground reflectance</span></div></span><div><span style="font-size:12.8px">where the ground reflectance is a constant value and mostly equal to 0.2</span></div><div><span style="font-size:12.8px"><br></span></div><div><span style="font-size:12.8px">hope this will solve the problem</span></div><div><span style="font-size:12.8px"><br></span></div><div><span style="font-size:12.8px">Regards,</span></div><div><span style="font-size:12.8px">Rami</span></div></div><div class="gmail_extra"><br><div class="gmail_quote"><div><div class="h5">On Mon, Jul 25, 2016 at 1:51 PM, Jordi Jove via TRNSYS-users <span dir="ltr"><<a href="mailto:trnsys-users@lists.onebuilding.org" target="_blank">trnsys-users@lists.onebuilding.org</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5"><div dir="ltr">Hi,<div><br></div><div>I am working in a solar district heating simulation project and I am getting a solar collecotr efficiency over 64%, which is impossible. I am refering to the ratio between incident radiation to the collectors, and the energy gain by them:</div><div><br></div><div>total radiation on tilted surface: 1,93 MWh/m²/year </div><div>useful energy gain by collectors: 1,23 MWh/m²/year </div><div><br></div><div>So, I connected something erroneously, but I can not find the right way. I tried Quadratic Collector type1a and type1b and I got the same excessive efficiency.</div><div><br></div><div>In the first one TYPE1a the connections with weather data are the following:</div><div><br></div><div> Ambient temperature-->Ambient temperature</div><div> Total radiation on tilted surface-->Incident radiation</div><div><br></div><div><br></div><div><br></div><div>In type 1b the connection are the following:</div><div><br></div><div><div> Ambient temperature-->Ambient temperature</div></div><div> Total radiation on horizontal --> Total horizontal radiation</div><div> Sky difuse radiation on horizontal --> Horizontal diffuse radiation</div><div> Ground reflected diffuse radiation on horizontal --> Ground reflectance</div><div> Total radiation on tilted surface --> Incident radiation</div><div> Angle of incidence for tilted surface --> Incident Angle</div><div> Slope of tilted surface --> Collector slope</div><div> </div><div><br></div><div>I really need to solve this problem, thanks.</div><div>Jordi</div><div><br clear="all"><div><div data-smartmail="gmail_signature"><div dir="ltr"><div>---<br>Jordi Jové Manonelles<br></div><i><a href="mailto:jovejm@gmail.com" target="_blank">jovejm@gmail.com</a></i><br></div></div></div>
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<br></blockquote></div><span class="HOEnZb"><font color="#888888"><br><br clear="all"><div><br></div>-- <br><div data-smartmail="gmail_signature"><div dir="ltr">Rami Anton Al-Assa'd<br>Tel: 00962 7 88726129<br>P.O. Box 151201<br>ِِJordan 13115 Az Zarqa<br>E-mail: ramianton@Gmail.com</div></div>
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