Re: [EnergyPlus_Support] Transmittances

["Michael J. Witte" <mjwitte@xxxxxxxx>]

The primary driver for changing transmittance is the angle of incidence of the 
direct solar.  The EnergyPlus Engineering Reference has an extensive 
description of these algorithms.  Also, the Window4/5 web site has a 
calculation method manual (for a slightly older version of Window, but the 
fundamentals have not changed).  

Mike

On 11 Aug 2005, at 6:30, leeslwong wrote:

> Dear all,
> 
> Solar & Visible tranmittances varies with time and they can be 
> shown/output in the output file in EnergyPlus. But I don't know their 
> properties and algorithm. So anyone have references and documents which 
> shows the calculation methods for beam-to-beam and diffuse-to-diffuse 
> transmittances of glasses used in Window4.0 or EnergyPlus?
> 
> Thanks!
> 
> lee
> 
> 
> 
> 
> 
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
> 
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
> 
> Attachments are not allowed -- please post any files to the appropriate folder
> in the Files area of the Support Web Site.
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 
> 
> 
> 
> 



========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx




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