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<div id="yui_3_16_0_1_1418970494964_35047" class="yiv0539928781moz-cite-prefix">Hello!<br clear="none">
<br clear="none">
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 clear="none">
<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 clear="none">
<br clear="none">
Please advise and give me some explanations on the calculation
procedure used in trnsys.<br clear="none">
<br clear="none">
Thank you for your support,<br clear="none">
Mihai Toderașc<br clear="none"><div id="yui_3_16_0_1_1418970494964_35057" class="yiv0539928781moz-signature"><br></div></div>
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