[TRNSYS-users] RE: Surface emissivity

[David Bradley]

Dear Joseph,
   As far as I know there is unfortunately, no way to modify the surface 
emissivity in Type56. You can, of course modify the longwave absorption of 
the wall surfaces. Type56 handles radiative exchange using a star network 
method. There is radiation exchange between each surface of a zone and the 
zone's air node. There is no direct radiative exchange between surfaces. 
For additional information, you can refer to section 2.1.7 of the 
06-Multizone Building Modeling with Type56 and TRNBuild manual for 
additional information on the long wave radiation exchange calculations 
that Type56 performs.
Kind regards,
   David

At 01:42 AM 8/17/2005, Phine wrote:
>Dear users,
>
>I am modelling a mud brick house using type 56. I would like to model the
>impact of putting on low-e paint indoor. How can I adjust the emissivity of
>the wall surfaces?
>
>Is there any standard procedure to account for such change? How does TRNSYS
>handles the radiative heat exchange?
>
>Regards,
>
>Joseph Cheung
>
>
>
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