Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same Calculator

✖Longer Side is defined as the side of rectangle which has long length with respect to the other side.ⓘ Longer Side [a]			+10% -10%
✖Shorter Side is defined as the side of the rectangle which has a short length with respect another side.ⓘ Shorter Side [b]			+10% -10%

✖Equivalent Diameter of Duct is the diameter equivalent to the given value.ⓘ Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same [D_e]

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Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same Solution

STEP 0: Pre-Calculation Summary

Formula Used

Equivalent Diameter of Duct = (2*Longer Side*Shorter Side)/(Longer Side+Shorter Side)
D_e = (2*a*b)/(a+b)
This formula uses 3 Variables

Variables Used

Equivalent Diameter of Duct - (Measured in Meter) - Equivalent Diameter of Duct is the diameter equivalent to the given value.
Longer Side - (Measured in Meter) - Longer Side is defined as the side of rectangle which has long length with respect to the other side.
Shorter Side - (Measured in Meter) - Shorter Side is defined as the side of the rectangle which has a short length with respect another side.

STEP 1: Convert Input(s) to Base Unit

Longer Side: 0.9 Meter --> 0.9 Meter No Conversion Required
Shorter Side: 0.7 Meter --> 0.7 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

D_e = (2*a*b)/(a+b) --> (2*0.9*0.7)/(0.9+0.7)

Evaluating ... ...

D_e = 0.7875

STEP 3: Convert Result to Output's Unit

0.7875 Meter --> No Conversion Required

FINAL ANSWER

0.7875 Meter <-- Equivalent Diameter of Duct

(Calculation completed in 00.004 seconds)

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Home » Physics » Refrigeration and Air Conditioning » Ducts » Mechanical » Parameters of Ducts » Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same

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< Parameters of Ducts Calculators

Equivalent Diameter of Circular Duct for Rectangular Duct when Quantity of Air is Same

LaTeX Go Equivalent Diameter of Duct = 1.256*((Longer Side^3*Shorter Side^3)/(Longer Side+Shorter Side))^0.2

Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same

LaTeX Go Equivalent Diameter of Duct = (2*Longer Side*Shorter Side)/(Longer Side+Shorter Side)

Reynolds Number in Duct

LaTeX Go Reynolds Number = (Diameter of Circular Duct*Mean Velocity of Air)/Kinematic Viscosity

Reynolds Number given Friction Factor for Laminar Flow

LaTeX Go Reynolds Number = 64/Friction Factor in Duct

Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same Formula

LaTeX Go

Equivalent Diameter of Duct = (2*Longer Side*Shorter Side)/(Longer Side+Shorter Side)
D_e = (2*a*b)/(a+b)

Equivalent Diameter of a Circular Duct for a Rectangular Duct

A round/circular shape results in lower pressure drops and less fan horsepower to move the air and, consequently, smaller equipment as compared to the rectangular shapes.

How to Calculate Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same?

Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same calculator uses Equivalent Diameter of Duct = (2*Longer Side*Shorter Side)/(Longer Side+Shorter Side) to calculate the Equivalent Diameter of Duct, Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same formula is defined as a measure of the diameter of a circular duct that would carry the same airflow as a rectangular duct, under the same velocity conditions, allowing for equivalent airflow comparisons between different duct shapes. Equivalent Diameter of Duct is denoted by D_e symbol.

How to calculate Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same using this online calculator? To use this online calculator for Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same, enter Longer Side (a) & Shorter Side (b) and hit the calculate button. Here is how the Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same calculation can be explained with given input values -> 0.7875 = (2*0.9*0.7)/(0.9+0.7).

FAQ

What is Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same?

Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same formula is defined as a measure of the diameter of a circular duct that would carry the same airflow as a rectangular duct, under the same velocity conditions, allowing for equivalent airflow comparisons between different duct shapes and is represented as D_e = (2*a*b)/(a+b) or Equivalent Diameter of Duct = (2*Longer Side*Shorter Side)/(Longer Side+Shorter Side). Longer Side is defined as the side of rectangle which has long length with respect to the other side & Shorter Side is defined as the side of the rectangle which has a short length with respect another side.

How to calculate Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same?

Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same formula is defined as a measure of the diameter of a circular duct that would carry the same airflow as a rectangular duct, under the same velocity conditions, allowing for equivalent airflow comparisons between different duct shapes is calculated using Equivalent Diameter of Duct = (2*Longer Side*Shorter Side)/(Longer Side+Shorter Side). To calculate Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same, you need Longer Side (a) & Shorter Side (b). With our tool, you need to enter the respective value for Longer Side & Shorter Side and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Equivalent Diameter of Duct?

In this formula, Equivalent Diameter of Duct uses Longer Side & Shorter Side. We can use 1 other way(s) to calculate the same, which is/are as follows -

Equivalent Diameter of Duct = 1.256*((Longer Side^3*Shorter Side^3)/(Longer Side+Shorter Side))^0.2

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