Re: [TRNSYS-users] RE: Surface emissivity

[David Bradley <bradley@tess-inc.com>]

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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