Re: [EnergyPlus_Support] Frame Effects

[fred buhl <wfbuhl@xxxxxxx>]

Peter,

EnergyPlus uses 2.5 inches = 63.55 mm for the frame edge width, which is 
pretty close to
65 mm. This value is hardwired in the program and is not a user input.

Fred Buhl

Peter G. Loutzenhiser wrote:

>Dear All,
>
>I am looking over the calculation procedure for the glazing heat balance 
>equation and in the Engineering Manual it shows the calcutions.  One value that 
>I am very interesting in is the "Ratio of Frame-Edge Glass Conductance" which 
>is an input into EnergyPlus used to quantify the edge effects.  According to 
>the Engineering Manual, this values is used in conjunction with an edge area. 
>To calculate this value required a frame edge distance.  Ashrae fundamental 
>suggests a common value for this glazing is 65 mm from the frame.  
>Unfortunately I have not been able to find what the standard value EnergyPlus 
>uses to calculate this ratio, because apparently it is not an input to the 
>code.  Is this the value the EnergyPlus uses?  If not, what value or how does 
>it calculated or if I have missed somewhere in the EnergyPlus literature, what 
>is the value?
>
>Many thanks,
>Peter
>  
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>The primary EnergyPlus web site is found at:
>http://www.energyplus.gov
>
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