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[EnergyPlus_Support] Re: Problem with Fanger PPD

Ok,I think this is
a good explanation in order to satisfy this fluctuation
thank so much!!
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Joe Huang <YJHuang@...> wrote:
>
> The Fanger Comfort Model is evaluated using the Mean Radiant Temperature 
> of the Surfaces, rather than the Air Temperature.
> On a hot day in the summer, the inside surface temperature, especially 
> of windows that receive solar radiation, can be quite a bit higher than 
> the instantaneous air temperature.
> 
> Joe
> 
> Joe Huang
> White Box Technologies, Inc.
> 346 Rheem Blvd., Suite 108D
> Moraga CA 94556
> yjhuang@...
> http://weather.whiteboxtechnologies.com
> http://www.whiteboxtechnologies.com
> (o) (925)388-0265
> (c) (510)928-2683
> "building energy simulations at your fingertips"
> 
> 
> On 5/22/2013 8:37 AM, nikolasspiliopoulos wrote:
> >
> > Hello,
> > I would like to ask you something about Fanger PPD because it is 
> > affected by too many factors,and I am really confused.
> >
> > Although,the Mean Air Temperature remains almost stable (25C-26C)and 
> > PMV factor fluctuates between "0.4-1.09" in the thermal zone,the 
> > Fanger starts increasing from about 10% to 35%.
> > Also,this happens during a hot day in the summer and the windows are 
> > closed
> >
> > Have you any ideas,why this fluctuation happens?
> >
> > Which Parameter could be responsible for this factor?
> >
> > thanks for your time!
> >
> > Nikolas Spiliopoulos
> >
> >
>




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