[esp-r] Re: MRT calculation using view factor

[Jon Hand]

There are two separate viewfactors - one set of viewfactors are for the real surfaces in
the zone.  A 2nd set of viewfactors are between the MRT sensor and the surfaces
in the zone.

The viewfactors are not 'automatically' calculated.  You have to ask for them to
be done and sometimes they can take several minutes to calculate.  There will
be a report after the calculation - read it carefully to see that all surfaces have
a summation close to 1.0.  You may have to adjust the resolution of the calculation
parameters.

I will have another look at the text in the Cookbook - the instructions might not 
be clear enough.

Regards, Jon Hand
________________________________________
From: esp-r-bounces at lists.strath.ac.uk [esp-r-bounces at lists.strath.ac.uk] On Behalf Of simsera1110 [simsera1110 at gmail.com]
Sent: 28 December 2010 05:21
To: esp-r at lists.strath.ac.uk
Subject: [esp-r]  MRT calculation using view factor

Hi

I have tried to calculate Mean Radiant Temperature depending on window surface temperature that is related PMV.

I installed MRT sensor and calculated view factors.

( I am wondering if view factor is used for calculating MRT and view factor is calculated automatically)

Anyway, after that, I did simulation.

but MRT didn't be calculated........PMV was calculated.

Do i install something like radiant panel on the ceiling ?? I red ESP-r COOKBOOK(2 december 2010) "radiation view factors"

or are there other options to set up for calculating MRT??

And Is there another way to calculate MRT ??

I really want to know.

Please give me a advice.

Thank you.