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Sascha,<br>
The equation is simply comparing two values; it doesn't know about
the units. So if Radiation_Input (the output from your weather data
reader probably - Type99?) is in W/m2 then X also needs to be in
W/m2. It is more likely that Radiation_Input is in kJ/h.m2 though,
in which case X also needs to be in kJ/h.m2.<br>
Best,<br>
David<br>
<br>
<br>
On 6/15/2012 05:04, Heinze wrote:
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<p class="MsoNormal">Hello again,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">i have another question about external
shading and the radiation. <o:p></o:p></p>
<p class="MsoNormal">I know that it can be controlled with an
equation using the radiation as input like:
Radiation_Input → Equation: =gt(Radiation_Input, <b>X</b>) →
Output linked to type 56 Shading <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">But with the X in the equation i am not
sure. I have a german TRY (.dat) weather file and the
radiation in this file is already given in W/m². Do i still
need to convert this to kJ/hr m² ? <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.5pt">Best regards<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt">Sascha
Heinze<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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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
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