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Mihai,<br>
Type109 was found to have a number of issues and so was rewritten
with the release of Trnsys17. If you are using a later version of
Trnsys16, you might may have access to either Type933 or Type15 and
I would highly recommend that you change to using one of these in
place of Type109 since you are reading from a *.tm2 file. Type933
and Type15 are the same Type but were released at different times.<br>
Kind regards,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 12/19/2014 04:49, Mihai T. wrote:<br>
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<div id="yui_3_16_0_1_1418970494964_35047"
class="yiv0539928781moz-cite-prefix">Hello!<br
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I made a simulation in Trnsys to evaluate the
heating demand for a office building. Now I need to
compare the trnsys results with some results
obtained using another method.<br clear="none">
<br clear="none">
Please help me to find how TYPE 109 calculates
„Ambient temperature” and how the correspondence
with the solar radiation values at the correct time
moments is ensured. I am asking you this because the
ambient temperature used in simulation is not the
same with ambient temperature from the weather data
file (dry bulb temperature in the file
'...\Trnsys16\Weather\Meteonorm\Europe\RO-Bucuresti-154200.tm2').
I cannot find this information in Trnsys Manual.<br
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<br clear="none">
The problem found is that, if a shift is made (with
1/2h) to the dry bulb temperature (by averaging two
values at 2 consecutive time moments in order to
place the average values in the middle of the hour
and to match the moment considered for solar
calculations), the result is a mismatch between
ambient temperature and solar radiation values (with
1 h difference).<br clear="none">
I have performed the solar calculation using Perez
model and I have found the same values as the ones
calculated in trnsys, but with 1 hour shift (to have
a correct match between temperatures and radiation
the latter should be moved forward with 1 hour).<br
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<br clear="none">
Please advise and give me some explanations on the
calculation procedure used in trnsys.<br
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<br clear="none">
Thank you for your support,<br clear="none">
Mihai Toderașc<br clear="none">
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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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