Re: [EnergyPlus_Support] Glazing Construction

[Han Yan <hannahyan@xxxxxxxxx>]

I used design day for my case. But there is no input
of solar radiaion for the users to define. And it
seems that the weather data make no difference if I
select Chicago or San Francisco. 

So where can I find the design day default solar data?

H


--- Edward Lyon <eglyon@xxxxxxx> wrote:
> The calculations in WINDOW 5 use a fixed value for
> solar radiation at a normal incidence to the window.
>  The EnergyPlus solar radiation is variable and
> typically not normal to the surface.  The solar
> radiation in EnergyPlus varies with the day's
> weather and the incident angle.  Clear glass will
> reflect and absorb different amounts of solar
> radiation depending on the incident angle.  The most
> likely cause of the calculation differences you
> observe is the actual difference in solar radiation
> between the two calculations.  It would also be very
> difficult to identically correlate the two
> calculations because of the difference between a
> WINDOW 5 steady state calculation and an EnergyPlus
> transient calculation.
> 
> Ned Lyon
> 
> Senior Staff Engineer
> Simpson Gumpertz & Heger Inc.
> 
> 41 Seyon Street
> Building #1, Suite 500
> Waltham, MA  02453
> 
> Phone:  781-907-9000
> Fax:  781-907-9009
> 
> 
> >>> hannahyan@xxxxxxxxx 12/12/02 03:24PM >>>
> 
> 
> 


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