[Bldg-sim] MRT Tool

[Ery Djunaedy]

ESP-r has a module that can calculate the view factor in any position
in the room. If you have the geometry in ESP-r, then you can specify a
location anywhere in the space, and the module will calculate the view
factor at that particular location.

I really miss that module when I work in EnergyPlus.

Cheeers,

Ery


On Tue, Apr 21, 2009 at 1:02 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
>
> LORD, AECK & SARGENT ARCHITECTURE
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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
> 14130 Riverside Drive Suite 201
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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
>
>
>
>
>
> Timothy Moore
> Senior Consultant
> Special Projects
>
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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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