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<p>Jibi,</p>
<p> It would help to know which Type you are asking about.
Transmittance absorptance products are typically obtained by
multiplying the transmittance and the absorptance of a transparent
material together. Depending on which component you are talking
about you may being asked for the transmittance-absorptance
product at a normal incidence angle or you may be being asked to
give some kind of hemispherical average.<br>
</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<br>
<div class="moz-cite-prefix">On 05/20/2018 20:06, Jibi Jais (지비 제이즈)
via TRNSYS-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAEAAPoJDz38=nw+OHuyvarRudjShBRqYzSPYSmkeRLGyY6G2hw@mail.gmail.com">
<div dir="ltr">
<div class="gmail_default"
style="color:rgb(12,52,61);font-family:verdana,sans-serif">Hi</div>
<div class="gmail_default"
style="color:rgb(12,52,61);font-family:verdana,sans-serif"><br>
</div>
<div class="gmail_default"
style="color:rgb(12,52,61);font-family:verdana,sans-serif">I
was trying to validate my TRNSYS results using the
mathematical description provided.</div>
<div class="gmail_default"
style="color:rgb(12,52,61);font-family:verdana,sans-serif">I
would like to know how the transmittance-absorptance product
was calculated. </div>
<div class="gmail_default"
style="color:rgb(12,52,61);font-family:verdana,sans-serif">I
did simulation for a flat-plate collector and a PVT system. </div>
<div class="gmail_default"
style="color:rgb(12,52,61);font-family:verdana,sans-serif">It
seems the value of transmittance and absorptance <span><span>is
not provided anywhere.</span></span></div>
<div class="gmail_default"
style="color:rgb(12,52,61);font-family:verdana,sans-serif"><span><span></span></span><br>
</div>
<div class="gmail_default"
style="color:rgb(12,52,61);font-family:verdana,sans-serif"><span><span>Thanks
in advance</span></span></div>
<div class="gmail_default"
style="color:rgb(12,52,61);font-family:verdana,sans-serif"><span><span></span></span><br>
</div>
<div class="gmail_default"
style="color:rgb(12,52,61);font-family:verdana,sans-serif"><span><span>Jibi</span></span></div>
</div>
<br>
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</blockquote>
<br>
<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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