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What is static pressure in duct designing and what values normally are used?

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Question ajoutée par Hasan Riaz , Mechanical Engineer , Saudi Bin Ladin Group (Hamad International Airport)
Date de publication: 2015/06/22
Muhammad Arsalan Siddiqui
par Muhammad Arsalan Siddiqui , Associate Director (MEP) , JLL

For duct designing the static depends on the fan internal and external pressures.

for size of duct supply air is normally design at .1"/100' and return is taken as0.08"/100'

 

magdy abd al nour
par magdy abd al nour , HVAC Site manger , First United Co.

ISP=internal static pressure on fan>>>>result from the intrenal fan filter + losses throgh the impller

 

ESP=external static pressure on fan>>result from the losses through out the duct and damper and the air diffuser....in AC catalogs you shall find the ESP only to tell how long duct can be installed on that AC .

 

EX :; if in catalog (ESP=0) That mean that AC is not design to work with duct (mini split units)

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