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Enyuan,<br>
Type1231 was developed based on correlations to model a heating
radiator, not a cooling radiator and it is likely that the
correlations simply do not hold true in cooling applications. I
would look to a different model. I would also be a bit careful;
most in-room cooling radiators operate above the dewpoint because
getting condensation all over their surfaces causes other problems.
<br>
<br>
As for connecting Type1231's output to Type56, define an energy
gain input (as opposed to a constant value or a schedule) in the
zone that contains the radiator. Then connect the Type1231 heat
transfer output to the gain input. I would recommend that you split
the gain about 80% convective and 20% radiative. Despite their name,
most radiators do significant heating by convection.<br>
Best,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 6/28/2013 13:34, Enyuan Hu wrote:<br>
</div>
<blockquote
cite="mid:CAJud35MaBwzFm1AjU2p8DotAxxcZpk6TFOwJbkvX-R21ApTONA@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small;color:#3333ff">Dear
all,</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small;color:#3333ff"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small;color:#3333ff">I'm
trying to model radiant cooling using the type 1231 radiator
in TESS library for TRNSYS 17. The model may be loose for
cooling as condensation is not considered, but we want to have
some idea of the effect when only convection and radiation are
dominant. I'm looking for answers to two questions:</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small;color:#3333ff"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small;color:#3333ff">1.
Is there any example or tutorial that shows how the radiator
can be used with type 56, or how they communicate?</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small;color:#3333ff"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small;color:#3333ff">2.
In searching previous threads on using the radiator, it seemed
that there's restriction on the inlet water temperature, that
it, it must be at least 0.5C above the room temperature. Can
we circumvent this restriction?</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small;color:#3333ff"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small;color:#3333ff">Thanks.</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small;color:#3333ff">Enyuan</div>
</div>
<br>
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<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>
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