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Thread: Duct sizing questions???
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23-12-2009, 06:21 AM #1
Duct sizing questions???
hi there i have few questions here so i hope u could answer..
is it necessary to use an elbow for distribution of air for duct systems. if yes how can i compute for the correct radius of the elbow...
another question: Is the size of the diffuser different from the size of the pipe where the air will flow...
last question: how can i convert a rectangular duct to a square duct.. Tnx...
Cheers...
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23-12-2009, 06:50 AM #2
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Re: Duct sizing questions???
Duct work Pressure drop: 60% to 80% of high temperature process duct work pressure drop occurs in the process equipment, baghouses, mills & cyclones. However since motor 1 (one) horsepower cost roughly $1000/year (US$), duct efficiency is important. Minimizing duct pressure drop is important. most ductwork, non-equipment pressure drop occurs at transitions and changes of directions (elbows). The bests way to minimize duct pressure drop ($) is to use elbows with a elbow radius to duct radius exceeding 1.5. (For a 15 foot duct, the elbow radius would therefore equal, or exceed 22.5 ft.)
http://books.google.hr/books?id=G47b...radius&f=false
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23-12-2009, 12:04 PM #3
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23-12-2009, 05:08 PM #4
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26-12-2009, 03:16 AM #5
Re: Duct sizing questions???
tnx a lot to those who have replied,,...
cheers..
happy holidays
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