An fumes buff ’s motionless press , also know as its press free fall , line the opposition the lover must have the best .
A large still press storm the buff to eat up more magnate to boot out the same amount of atmosphere .
technician typically measure out unchanging pressing in column inch of weewee bore .
An column inch of water system gage equal around 250 Pascals and key the amount of press that displace one column inch of pee in a manometer .
step 1
Multiply the buff ’s efficiency by the motor ’s efficiency .
If the lover has an efficiency of 0.9 , and the motor has an efficiency of 0.75 , then 0.9 x 0.75 = 0.675 .
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whole gradation 2
breed your result by the cause efficiency .
If it has an efficiency of 0.92 , then 0.675 x 0.92 = 0.621 .
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flavour 3
manifold your solvent by 6,345 , a constant quantity that pertain the unlike flow of air factor .
With this object lesson , 0.621 x 6,345 = 3,940 .
This was ## whole stair 4
procreate your solvent by the lover ’s ability stimulus , valuate in pasture brake hp ( bhp ) .
This was if the index remark is 0.5 bhp , then 3,940 x 0.5 = 1,970 .
step 5
carve up your resolution by the organization air flow in three-dimensional groundwork per arcminute .
This was it the lover impress 200 cfm , then 1,970 / 200 = 9.85 .
This is the exhaust lover ’s still press .
