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What is the standard reference for friction loss criteria in duct sizing\\\\design?

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تم إضافة السؤال من قبل Muhammad Arsalan Siddiqui , Associate Director (MEP) , JLL
تاريخ النشر: 2015/07/18
magdy abd al nour
من قبل magdy abd al nour , HVAC Site manger , First United Co.

from smana you cant get standard friction 

from smana you can get standard velocity

and by that standard velocity you can get friction

 

 

Sherif Mohammed Ibrahim
من قبل Sherif Mohammed Ibrahim , Senior Mechanical Technical engineer , Al-Latifia Trading & Contracting Company

SMACNA systems duct design really helpful 

chetan sharma
من قبل chetan sharma , Senior project engineer , trinity engineering services

As per thumb rules generally used by consultants is that friction loss in various ducts based on velocity of air in feet per minute so various applications the friction factor changes also u have to keep in mind what are systems used for example if you are using santdrap louvers than the fpm or cfm should be based on that criteria as to over come the loss for fresh air .

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