[EnergyPlus_Support] Cp: wind pressure coefficient

[Ana Paula Melo <apaula_melo@xxxxxxxxx>]

Hi,
   
  I would like to know about the Cp = Wind surface pressure coefficient.
   
  I read in the Enguneering Reference that the EnergyPlus uses the formula of Sawmi and Chandra (1988) to calculate wind pressure coefficient values. The equation has a G value (Natural log of the ratio of the width of the wall under consideration to the width of the adjacent wall). 
   
  I looked at ASHRAE Fundamentals Handbook 2001 ? Cap26 and I noticed that the formula to calculate wind pressure coefficient values is different. Also, I looked at ASHRAE Fundamentals Handbook 2005 ? Cap27 and it is different too as it does not have this G value.
   
  What is the real formula that is used by EnergyPlus and Why???
   
  Thanks for all,
   
  Ana Paula.

       
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