Re: [EnergyPlus_Support] sky luminance

[Linda Lawrie <linda@xxxxxxxxxxxxxx>]

A new sky luminance model is not in the enhancement list
queue.  

If you were a collaborative developer, you could develop one and submit
it to the team for potential inclusion.

Many times there will be changes when one takes a reference idea and has
to fit it into code.  As code is not provided by references (nor
have they stood test of time).

Why would the sky model need to be changed?


At 10:52 PM 2/2/2010, Hu,Jia wrote:
> After reading one orginal ref.
> of Eng. Ref . I feel  some inconsistency maybe exists between
> Eng.Ref. and original source.
>  
> In Page 152 (PDF 191), it interpolates the two sky luminance
> distributions, but in its reference, Perez (1990)  interpolated the
> "geometrical factor ", which is the ratio of sky luminance
> distribution to Zenith luminance. In different sky types, Zenith
> luminance is different even if sky conditions are the same
>  
> I do not know how EPlus actually works in this case. if it follows the
> Engineering Ref. some errors may occur. But it probably follows the
> method of the reference.
>  
> Many other sky models are developed now.  is it possible to update
> the sky luminance distribution model in
> EPlus?

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