Vikram, of course those two people even things out!! Umm, but really, this is why I'm looking for a MRT calculator. This way I can test a few locations in a given room quickly (much easier than doing hand calcs). I think that <a href="http://www.meanradianttemperature.com">www.meanradianttemperature.com</a> used to have one online, but the site seems to be down. Does anyone have any information? Is this site down permanently, or is this a temporary issue?<br>
<br>I will probably end up with the ASHRAE calculator as it seems easiest to use.<br><br>Thanks for all the input.<br><br>--<br>Karen<br><br><div class="gmail_quote">On Tue, Apr 21, 2009 at 3:02 PM, Vikram Sami <span dir="ltr"><<a href="mailto:VSami@lasarchitect.com">VSami@lasarchitect.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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<p><span style="font-size: 11pt; color: rgb(0, 37, 196);">It’s an interesting conundrum that the times that MRT
becomes a significant player in the comfort calculation is when there is an
uneven radiant field (hot or cold window; fireplace; thermal mass wall). In
such a situation, is it fair to average out the MRT for an entire room? Don’t
your view factors change drastically depending on your position in the room? </span></p>
<p><span style="font-size: 11pt; color: rgb(0, 37, 196);"> </span></p>
<p><span style="font-size: 11pt; color: rgb(0, 37, 196);">Does one person too hot near the window and another person too
cold on the inside equal thermal comfort? </span></p>
<p><span style="font-size: 11pt; color: rgb(0, 37, 196);"> </span></p>
<div>
<p><b><span style="font-family: "Garamond","serif"; color: black;">Vikram Sami,</span></b><span style="color: rgb(0, 37, 196);"> </span><span style="font-family: "Garamond","serif"; color: black;">LEED AP</span><span style="color: rgb(0, 37, 196);"> <br>
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<p><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;">
<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Peter
Simmonds<br>
<b>Sent:</b> Tuesday, April 21, 2009 1:36 PM<br>
<b>To:</b> Timothy Moore; Karen Walkerman; <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><div><div></div><div class="h5"><br>
<b>Subject:</b> Re: [Bldg-sim] MRT Tool</div></div></span></p>
</div>
</div><div><div></div><div class="h5">
<p> </p>
<p><span style="font-size: 10pt; color: navy;">I do not think the thermal comfort tool calculates the MRT it is a
user input.</span></p>
<p><span style="font-size: 10pt; color: navy;"> </span></p>
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<p style="margin-bottom: 12pt;"><span style="font-size: 10pt; color: black;">Peter
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<p><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;"> Timothy Moore
[mailto:<a href="mailto:timothy.moore@iesve.com" target="_blank">timothy.moore@iesve.com</a>] <br>
<b>Sent:</b> Tuesday, April 21, 2009 10:00 AM<br>
<b>To:</b> Karen Walkerman; <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> Re: [Bldg-sim] MRT Tool</span></p>
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<p> </p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);">Karen,</span></p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);">The ASHRAE-55 Thermal Comfort Tool created by the UC Berkeley
Center for the Built Environment and available from ASHRAE publications (if I
recall correctly) includes a very easy-to-use MRT calculator for rectangular
rooms. It allows for MRT at a particular position in that room, separate
surface temperatures and dimensions for surfaces, and also the inclusion of a
“panel” or other area within one of the walls (such as a cold/hot
window, heating panel, etc.) that has a distinct temperature. This is part of a
very handy tool for determining PPD, etc. based upon the typical range of human
thermal comfort variables (clo value, activity level, air temp, MRT, humidity,
air movement).</span></p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);">Cheers,</span></p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);">Timothy</span></p>
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<p><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;">
<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>
[mailto:<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Karen
Walkerman<br>
<b>Sent:</b> Tuesday, April 21, 2009 9:50 AM<br>
<b>To:</b> <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br>
<b>Subject:</b> [Bldg-sim] MRT Tool</span></p>
</div>
<p> </p>
<p>Hello,<br>
<br>
Is anyone aware of a simple Mean Radiant Temperature calculation tool?
I'm looking for something that will calculate MRT for a basic rectangular room.<br>
<br>
Thanks!<br>
<br>
--<br>
Karen</p>
</div></div></div>
</div>
</blockquote></div><br>