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Equivalent diameter Formula

GoEquivalent diameter of tube for transverse fin heat exchanger Formula

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Equivalent diameter is the diameter equivalent to the given value. Check FAQs

De = 2 \cdot \frac{A s + AB}{π \cdot P}

De - Equivalent Diameter?A_s - Surface Area?AB - Bare Area?P - Perimeter?π - Archimedes' constant?

Equivalent diameter Example

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Here is how the Equivalent diameter equation looks like with Values.

Here is how the Equivalent diameter equation looks like with Units.

Here is how the Equivalent diameter equation looks like.

0.0214 = 2 \cdot \frac{0.52 + 0.32}{3.1416 \cdot 25}

0.0214m = 2 \cdot \frac{0.52m² + 0.32m²}{3.1416 \cdot 25m}

0.0214 = 2 \cdot \frac{0.52 + 0.32}{3.1416 \cdot 25}

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Equivalent diameter Solution

Follow our step by step solution on how to calculate Equivalent diameter?

FIRST Step Consider the formula

De = 2 \cdot \frac{A s + AB}{π \cdot P}

Next Step Substitute values of Variables

∴

De = 2 \cdot \frac{0.52m² + 0.32m²}{π \cdot 25m}

Next Step Substitute values of Constants

∴

De = 2 \cdot \frac{0.52m² + 0.32m²}{3.1416 \cdot 25m}

Next Step Prepare to Evaluate

∴

De = 2 \cdot \frac{0.52 + 0.32}{3.1416 \cdot 25}

Next Step Evaluate

∴

De = 0.0213904243515507m

LAST Step Rounding Answer

∴

De = 0.0214m

Equivalent diameter Formula Elements

Variables

Constants

Equivalent Diameter

Equivalent diameter is the diameter equivalent to the given value.

Symbol: De

Measurement: LengthUnit: m

Note: Value can be positive or negative.

Formulas to find Equivalent Diameter

Surface Area

Surface Area of a three-dimensional shape is the sum of all of the surface areas of each of the sides.

Symbol: A_s

Measurement: AreaUnit: m²

Note: Value should be greater than 0.

Formulas to find Surface Area

Bare Area

Bare area of fin over the fin leaving fin base.

Symbol: AB

Measurement: AreaUnit: m²

Note: Value can be positive or negative.

Formulas to find Bare Area

Perimeter

The perimeter of a figure is the total distance around the edge of the figure.

Symbol: P

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Perimeter

Archimedes' constant

Archimedes' constant is a mathematical constant that represents the ratio of the circumference of a circle to its diameter.

Symbol: π

Value: 3.14159265358979323846264338327950288

Other Formulas to find Equivalent Diameter

Go Equivalent diameter of tube for transverse fin heat exchanger

De = \frac{R e \cdot μ}{Δm}

Other formulas in Fin Parameters category

Go Number of tubes in transverse fin heat exchanger

N = \frac{m}{G \cdot TP \cdot h c}

Go Distance between two consequent tubes in transverse fin heat exchanger

TP = \frac{m}{G \cdot N \cdot L}

Go Length of tube bank

L = \frac{m}{G \cdot N \cdot TP}

Go Fin surface area

A s = (\frac{π}{2}) \cdot NF \cdot (({FD}^{2}) - ({d o}^{2}))

How to Evaluate Equivalent diameter?

Equivalent diameter evaluator uses Equivalent Diameter = 2*(Surface Area+Bare Area)/(pi*Perimeter) to evaluate the Equivalent Diameter, The Equivalent diameter formula is defined as the diameter of a circle with an equal aggregate sectional area. Equivalent Diameter is denoted by De symbol.

How to evaluate Equivalent diameter using this online evaluator? To use this online evaluator for Equivalent diameter, enter Surface Area (A_s), Bare Area (AB) & Perimeter (P) and hit the calculate button.

FAQs on Equivalent diameter

What is the formula to find Equivalent diameter?

The formula of Equivalent diameter is expressed as Equivalent Diameter = 2*(Surface Area+Bare Area)/(pi*Perimeter). Here is an example- 0.02139 = 2*(0.52+0.32)/(pi*25).

How to calculate Equivalent diameter?

With Surface Area (A_s), Bare Area (AB) & Perimeter (P) we can find Equivalent diameter using the formula - Equivalent Diameter = 2*(Surface Area+Bare Area)/(pi*Perimeter). This formula also uses Archimedes' constant .

What are the other ways to Calculate Equivalent Diameter?

Here are the different ways to Calculate Equivalent Diameter-

Equivalent Diameter=(Reynolds Number(e)*Viscosity of Fluid)/(Mass Flux)

Can the Equivalent diameter be negative?

Yes, the Equivalent diameter, measured in Length can be negative.

Which unit is used to measure Equivalent diameter?

Equivalent diameter is usually measured using the Meter[m] for Length. Millimeter[m], Kilometer[m], Decimeter[m] are the few other units in which Equivalent diameter can be measured.

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