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Oswaldo,<br>
There are many reasons why the simulation and the measured data are
not matching. Of course it is important to make sure that the
parameters of Type74 match the parameters of the actual system. Keep
in mind that Type109 reads "average" water data that is supposedly
compiled over a long period of time. Much the the data available for
Type109 (and the much preferred Type15) is modeled and not measured
at all. If you have measured data for the site then you can use a
combination of Type9 and Type16 to read and process the data then
pass it to type74. <br>
Kind regards,<br>
David<br>
<br>
<br>
On 8/9/2011 21:24, Oswaldo Hidalgo Barrientos wrote:
<blockquote
cite="mid:CAFdwPx6-f306EAmSTE-3zFJ2BQZVexnTRenxj9aNgAcYjfA+hw@mail.gmail.com"
type="cite">Dear all
<div><br>
</div>
<div>
<div>I am simulating a couple of Type weather Type109-TMY2
(CO-Bogota El dorado) and a Type74 (CPC Collector)...the
values of "useful energy gain" of CPC Collector in one day
standard of simulation are between 9am:1248kJ/hr (2738HP),
3pm:656.4kJ/hr(1674HP) with max at 1:30pm:2184kJ/hr(4422HP). </div>
<div>My problem is the next: I have operating a real parabolic
solar collector and it give me a "useful energy gain" average
value of 1HP or 740W, as your can look, the different between
real practic values and the trnsys values is so much. I think
that can be because the units simulation are in hours,
example: kJ/hr,. but really I dont understand this condition.</div>
</div>
<div>If in the simulation studio I add a new equation where it
divides useful enegy gain in 3600seconds, the new values are
9am:0.76HP, 3pm:0.465, 1:30pm:1,23HP this values are so similar
at reality.</div>
<div>My question is, how could I do to that the values of
simulation be as reality values without use the equation on the
simulation studio? or what is the correct way to simulated this
couple?</div>
<div><br>
</div>
<div>best regards</div>
<div><br>
</div>
<div>Oswaldo Hidalgo.</div>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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