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Posted by AKS on January 13, 2007, 12:24 pm
That is very simple use formula ( 69=69=69)
now turn it up side down and vahla! ( 69= 69 =69)
Dido
> Fanger's approach (which is a part of ISO 7730) to computing zones of
> thermal comfort is an iterative technique, thus it can be said that
> it's computationally expensive. Does anybody know if there is a
> closed-form approximation to Fanger's algorithm? (There seems it is,
> according to some HVAC producers' documentation, but the exact formulae
> weren't published, or at least I wasn't able to find them on the
> Internet or my library.)
> Another question: can anybody give pointers to PD (draught)
> calculation? The literature is incredibly sparse on this, and any help
> would be appreciated. My main problem is to discover how to calculate
> the so-called "local turbulence intensity", needed to calculate final
> PD value. Thanks in advance.
>
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> thermal comfort is an iterative technique, thus it can be said that
> it's computationally expensive. Does anybody know if there is a
> closed-form approximation to Fanger's algorithm? (There seems it is,
> according to some HVAC producers' documentation, but the exact formulae
> weren't published, or at least I wasn't able to find them on the
> Internet or my library.)
> Another question: can anybody give pointers to PD (draught)
> calculation? The literature is incredibly sparse on this, and any help
> would be appreciated. My main problem is to discover how to calculate
> the so-called "local turbulence intensity", needed to calculate final
> PD value. Thanks in advance.
>