Assignment • Individual assignment. • Calculate the pressure loss of air in a flat oval duct...

Question

Question

Assignment • Individual assignment. • Calculate the pressure loss of air in a flat oval duct with a = 16 in and b = 28 in for

Answer 1

Answer #1

The given problem can be solved by using pressure loss vs volume flow rate chart for air ducts as shown below:

200 Pressure drop, AP (Pa) speed, mis 100 SO 40 30 100 110 125 160 140 150 2006 10 115 7 diameter, men 150 00 $ 450 3 50 100

As the given chart is in metric units, we need to convert the given units into metric system.

Therefore, a= 16*0.0254= 0.4064 m

b= 28*0.0254= 0.7112 m

Volume flow rate, Q= 3000*(0.305)³*60= 5107.072 m³/h

The cross sectional area of the duct is, A= π *0.4064*0.7112= 0.9080 m².

The velocity in the duct is given as, V= Q/(3600*A) = 1.562 m/s.

From the above graph, for the given velocity and flow rate the pressure loss per meter length comes out to be around,

$\Delta$ P= 0.159 Pa/m.

PLEASE UPVOTE the answer if you find it useful!

Answer 2

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