[Bldg-sim] MRT Tool

[Karen Walkerman]

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 www.meanradianttemperature.com 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?

I will probably end up with the ASHRAE calculator as it seems easiest to
use.

Thanks for all the input.

--
Karen

On Tue, Apr 21, 2009 at 3:02 PM, Vikram Sami <VSami at lasarchitect.com> wrote:

>  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?
>
>
>
> Does one person too hot near the window and another person too cold on the
> inside equal thermal comfort?
>
>
>
> *Vikram Sami,* LEED AP
> Direct Phone 404-253-1466 | Direct Fax 404-253-1366
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> *From:* bldg-sim-bounces at lists.onebuilding.org [mailto:
> bldg-sim-bounces at lists.onebuilding.org] *On Behalf Of *Peter Simmonds
> *Sent:* Tuesday, April 21, 2009 1:36 PM
> *To:* Timothy Moore; Karen Walkerman; bldg-sim at lists.onebuilding.org
>
> *Subject:* Re: [Bldg-sim] MRT Tool
>
>
>
> I do not think the thermal comfort tool calculates the MRT it is a user
> input.
>
>
>
> Peter Simmonds. Ph.D.
> Senior Associate, Advanced Technology Group
>
> IBE Consulting Engineers
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> *From:* Timothy Moore [mailto:timothy.moore at iesve.com]
> *Sent:* Tuesday, April 21, 2009 10:00 AM
> *To:* Karen Walkerman; bldg-sim at lists.onebuilding.org
> *Subject:* Re: [Bldg-sim] MRT Tool
>
>
>
> Karen,
>
>
>
> 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).
>
>
>
> Cheers,
>
> Timothy
>
>
>
>
>
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> *Timothy Moore
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>
> *From:* bldg-sim-bounces at lists.onebuilding.org [mailto:
> bldg-sim-bounces at lists.onebuilding.org] *On Behalf Of *Karen Walkerman
> *Sent:* Tuesday, April 21, 2009 9:50 AM
> *To:* bldg-sim at lists.onebuilding.org
> *Subject:* [Bldg-sim] MRT Tool
>
>
>
> Hello,
>
> 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.
>
> Thanks!
>
> --
> Karen
>
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