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Unacceptable heat transfer coefficient values
 
  
 
  
 
 
 
 
 
 
    
        
        asked 5 years ago  
 
 Amir Tabadkani's avatar  
 
 
 
 
    
        
        updated 5 years ago  
 
 __AmirRoth__'s avatar  
 
 
 
 
 
Dear Community,
 
I have modeled a simple shading system over a single window (venetian blinds) with a glare control on it, but when I output the Hcv on hourly basis, there are some hours that Hcv value is equal to 1000 between the shading system and outer layer of the window! 
 
It seems there is sth wrong within the idf file but I could not find any clue. 
 
Your help is highly appreciated on this issue. 
 
Regards
Amir 
 
C:\fakepath\2019-12-22_163028.jpg
 
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        answered 5 years ago  
 
 shorowit's avatar  
 
 
 
 
 
Refer to the E+ engineering documentation on exterior convection where it says:
 
 
Note that when the outside environment
  indicates that it is raining, the
  exterior surfaces (exposed to wind)
  are assumed to be wet. The convection
  coefficient is set to a very high
  number (1000) and the outside
  temperature used for the surface will
  be the wet-bulb temperature. (If you
  choose to report this variable, you
  will see 1000 as its value.)
 
 
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Thanks a lot @shorowit
Amir Tabadkani's avatar
                        Amir Tabadkani
                     (
    
        5 years ago
    )
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        Asked:  5 years ago  
 
 
        Seen: 175 times 
 

        Last updated: Dec 22 '19 
 
 
 
 
 
 
 
 
 
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