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Chimney Flow Rate Calculator

The document provides information about calculating the flow rate of a round chimney with a width and length of 15.2 cm and a height of 0.7 m. The interior temperature is given as 426 degrees C and the outside air temperature is 20 degrees C. The calculated flow rate is 358.7 cubic meters per second. Constants used in the calculation include the discharge coefficient, gravitational acceleration, interior and exterior temperatures, chimney cross-sectional area, and height. Conversion factors are also provided to convert between inches and centimeters, feet and meters, and degrees Celsius and Fahrenheit.

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mazumdar_satyajit
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650 views4 pages

Chimney Flow Rate Calculator

The document provides information about calculating the flow rate of a round chimney with a width and length of 15.2 cm and a height of 0.7 m. The interior temperature is given as 426 degrees C and the outside air temperature is 20 degrees C. The calculated flow rate is 358.7 cubic meters per second. Constants used in the calculation include the discharge coefficient, gravitational acceleration, interior and exterior temperatures, chimney cross-sectional area, and height. Conversion factors are also provided to convert between inches and centimeters, feet and meters, and degrees Celsius and Fahrenheit.

Uploaded by

mazumdar_satyajit
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
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Input dimensions in centimeters and temperatures in degrees C

Choose flue shape


Round or Square
Round

Width (mm)
15.2

Length (mm) Chimney Height (m)


15.2
0.7

Cross section area =


181.46

Outside Air Temperature =

20

Approx interior temperature =

426

Chimney flow Rate

358.7

Round

calculated area
181.4622238

Square

Calculation steps
7.9746763948
2.8239469533
358.7

231.04

Constants
C = discharge coefficient (usually taken to be from 0.65 to 0.70)
g = gravitational acceleration, 9.807 m/s
Ti = average temperature inside the chimney, K
Te = external air temperature, K
A = cross-sectional area of chimney, m (assuming it has a constant cross-section)
Q = chimney draught/draft flow rate, m/s
H = height of chimney, m

Degrees F
800

Temperature Converter
Degrees C
=
426.7

Inches
6

Inches to Meters converter


to
centimeters
=
15.2

Feet
2

Feet to Meters converter


to
Meters
=
0.7

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