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Window U-factor question
 
  
 
  
 
 
 
 
 
 
    
        
        asked 4 years ago  
 
 SH Ko's avatar  
 
 
 
 
 
Hi, I’m SH Ko working in a Korea glass company.
 
Now, I am studying the effect of glass windows on energy consumption in buildings.
 
For simulation, I am trying to use Energy plus.
 
In there, I have a question, I know that basically window is composed glass(Ug) and frame(Uf).
 
In Energy plus(WindowMaterial:SimpleGlazingSystem category), Does the U-Factor mean Ug(only glass)? Or Uw(glass + frame)?
 
Please check this out and let me know.
 
Best regard
 
SH Ko
 
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        answered 4 years ago  
 
 shorowit's avatar  
 
 
 
 
    
        
        updated 4 years ago  
 
 
 
 
 
Please refer to the WindowMaterial:SimpleGlazingSystem documentation:
 
 
The performance indices are U-factor
  and Solar Heat Gain Coefficient, and
  optionally Visible Transmittance. The
  values for these performance indices
  can be selected by the user to
  represent either glazing-only windows
  (with no frame) or an average window
  performance that includes the frame.
  Inside the program the model produces
  an equivalent window glazing layer
  with no frame.
 
 
If you provide properties that only include the glazing, then you would presumably want to use the WindowProperty:FrameAndDivider object as well. If you provide properties that include both, then the frame does not need to be separately described.
 
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        Asked:  4 years ago  
 
 
        Seen: 124 times 
 

        Last updated: Apr 27 '21 
 
 
 
 
 
 
 
 
 
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