Air Pressure Drop Calc

PRESSURE DROP CALCULATION FOR RECT. DUCTS

item

air flow

m3/h

1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 27221770.xls

duct dimensions

mm

outside fixed louver etc. 9500 1000 150 150 440 250 300 200 400 200 10200 1200 16290 1600 17110 1600 470 300 820 450 1290 400 2340 500 2690 525 2100 500 4200 675 3700 600 5300 850 9500 850 14500 1000 13500 950

mm

550 100 150 150 175 500 550 550 150 175 275 350 350 400 500 500 500 650 700 700

equivalent diametar

duct length

mm

m

709.7 120.0 187.5 171.4 186.7 705.9 818.6 818.6 200.0 252.0 325.9 411.8 420.0 444.4 574.5 545.5 629.6 736.7 823.5 806.1

air velocity linear drop R

m/s

22.00 24.00 15.00 12.00 15.00

Pa/m

4.8 2.8 3.3 2.8 3.2 4.7 5.1 5.4 2.9 2.9 3.3 3.7 4.1 2.9 3.5 3.4 3.5 4.8 5.8 5.6

30.00 11.00 8.00 2.70 2.70 2.70 2.70 15.00 2.70 2.70 2.70 2.70 2.00 1

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RxL

local pressure drop coefficient

Pa

#V # VALUE! #VALUE! #V #VALUE! #VALUE! #V #VALUE! #V #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! #V #VALUE! #V #VALUE! #V #VALUE! #V #VALUE! #V #VALUE! #VALUE! #V #VALUE! #V #VALUE! #V #VALUE! #V #VALUE! #V

local pressure drop Pa

0.00 1.00 3.00 0.85 1.00 1.00 1.00 1.50 2.00 0.10 0.00 0.00 0.00 0.00 5.00 0.00 0.10 0.00 0.00 0.10

0.0 4.6 19.1 3.9 6.0 13.4 15.9 26.3 10.1 0.5 0.0 0.0 0.0 0.0 35.8 0.0 0.7 0.0 0.0 1.9

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21 22 23 24 25 26 27 28

4550 800 400 7650 1000 600 850 700 725 9990 650 700 4372 650 625 3609 600 575 2846 500 550 2083 400 525 Grilles diffussers etc. UKUPAN PAD PRITISKA [Pa]

533.3 750.0 712.3 674.1 637.3 587.2 523.8 454.1

0.70 2.70 2.70 2.70 2.70 2.70 2.70 2.70

3.9 3.5 0.5 6.1 3.0 2.9 2.9 2.8

#VALUE! #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! #VALUE!

#V # VALUE! #VALUE! #V #VALUE! #V #VALUE! #V #VALUE! #V #VALUE! #V #VALUE! #V #VALUE! #V

0.00 0.00 0.10 0.10 0.10 0.10 0.10 1.50

 You should eneter air flow, duct dimensions, and coefficient of local pressure drops. Do not touch yellow cells.

0.0 0.0 0.0 2.2 0.5 0.5 0.5 6.8

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 TOTAL PRESSURE DROP Pa

55.0 #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! #VALUE!

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#VALUE! #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! #VALUE! 70.0 #VALUE!