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Duct Size Calculator (SI & IP)

The document appears to be a duct size calculator that provides calculations for duct dimensions, material, roughness, equivalent diameter, hydraulic diameter, velocity, velocity pressure, Reynolds number, friction factor, and duct friction based on inputted air volume, duct size, and material. It notes that for the calculation, the user should only input the yellow highlighted values of duct friction and height, and should not change any other values or formulas.

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Mohd Izham Idris
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© © All Rights Reserved
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479 views4 pages

Duct Size Calculator (SI & IP)

The document appears to be a duct size calculator that provides calculations for duct dimensions, material, roughness, equivalent diameter, hydraulic diameter, velocity, velocity pressure, Reynolds number, friction factor, and duct friction based on inputted air volume, duct size, and material. It notes that for the calculation, the user should only input the yellow highlighted values of duct friction and height, and should not change any other values or formulas.

Uploaded by

Mohd Izham Idris
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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DUCT SIZE CALCULATOR (SI) DUCT SIZE CAL

A. AIR VOLOUME (L/s) 700 A. AIR VOLOUME (CFM)


W H
B. DUCT SIZE (MM) 660 305 B. DUCT SIZE (INCH)
C. DUCT MATERIAL GALVANISED C. DUCT MATERIAL
D. ABS ROUGHNESS(mm) 0.15 D. ABS ROUGHNESS (ft)
E. EQUIVALAENT DIAMETER (MM) 481.6 E. EQUIVALAENT DIAMETER
F. HYDRAULIC DIAMETER (MM) 417.2 F. HYDRAULIC DIAMETER (I
G. DUCT VELOCITY (m/s) 3.5 G. DUCT VELOCITY (FPM)
H. VELOCITY PRESSURE (Pa) 7.3 H. VELOCITY PRESSURE (Inc
I. REYNOLDS NO.(Re) 96,332 I. REYNOLDS NO.(Re)
J. FRICTION FACTOR (f) 0.01950 J. FRICTION FACTOR (f)
K. DUCT FRICTION (Pa/ M) 0.340 K. DUCT FRICTION (Inch/ 100

For this calculation pleae check only duct friction & heig For this calculation pleae chec

HEIGHT AS PER AVAILABILITY OF SPACE. HEIGHT AS PER AVAILABILI


DUCT FRICTION AS PER RECOMMENDED VALUE. DUCT FRICTION AS PER REC

ONLY INPUT YELLOW FIGURE. ONLY INPUT YELLOW FI


DON'T CHANGE ANY OTHER VALUE OR FORMULAE. DON'T CHANGE ANY OTHER

A= 6.8317E+20 A=
B= 2.8168E-07 B=
f= 0.01994415 f=
DUCT SIZE CALCULATOR (IP)

R VOLOUME (CFM) 4000


W H
CT SIZE (INCH) 46 14 1219.2
CT MATERIAL GALVANISED
S ROUGHNESS (ft) 0.0005
UIVALAENT DIAMETER (INCH) 26.6
DRAULIC DIAMETER (INCH) 21.5
CT VELOCITY (FPM) 894.4
LOCITY PRESSURE (Inch) 0.050
YNOLDS NO.(Re) 164,352
ICTION FACTOR (f) 0.01767
CT FRICTION (Inch/ 100 FT) 0.049

this calculation pleae check only duct friction & height

IGHT AS PER AVAILABILITY OF SPACE.


CT FRICTION AS PER RECOMMENDED VALUE.

LY INPUT YELLOW FIGURE.


N'T CHANGE ANY OTHER VALUE OR FORMULAE.

3.29721E+21
0
0.0163831537

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