Equivalent diameter Calculator

✖Surface Area of a three-dimensional shape is the sum of all of the surface areas of each of the sides.ⓘ Surface Area [A_s]			+10% -10%
✖Bare area of fin over the fin leaving fin base.ⓘ Bare Area [AB]			+10% -10%
✖The perimeter of a figure is the total distance around the edge of the figure.ⓘ Perimeter [P]			+10% -10%

✖Equivalent diameter is the diameter equivalent to the given value.ⓘ Equivalent diameter [De]

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Formula

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Equivalent diameter

Formula

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

Example

0.02139 m = 2 \cdot \frac{0.52 m² + 0.32 m²}{π \cdot 25 m}

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Equivalent diameter Solution

STEP 0: Pre-Calculation Summary

Formula Used

Equivalent Diameter = 2*(Surface Area+Bare Area)/(pi*Perimeter)
De = 2*(A_s+AB)/(pi*P)
This formula uses 1 Constants, 4 Variables

Constants Used

pi - Archimedes' constant Value Taken As 3.14159265358979323846264338327950288

Variables Used

Equivalent Diameter - (Measured in Meter) - Equivalent diameter is the diameter equivalent to the given value.
Surface Area - (Measured in Square Meter) - Surface Area of a three-dimensional shape is the sum of all of the surface areas of each of the sides.
Bare Area - (Measured in Square Meter) - Bare area of fin over the fin leaving fin base.
Perimeter - (Measured in Meter) - The perimeter of a figure is the total distance around the edge of the figure.

STEP 1: Convert Input(s) to Base Unit

Surface Area: 0.52 Square Meter --> 0.52 Square Meter No Conversion Required
Bare Area: 0.32 Square Meter --> 0.32 Square Meter No Conversion Required
Perimeter: 25 Meter --> 25 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

De = 2*(A_s+AB)/(pi*P) --> 2*(0.52+0.32)/(pi*25)

Evaluating ... ...

De = 0.0213904243515507

STEP 3: Convert Result to Output's Unit

0.0213904243515507 Meter --> No Conversion Required

FINAL ANSWER

0.0213904243515507 ≈ 0.02139 Meter <-- Equivalent Diameter

(Calculation completed in 00.020 seconds)

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Home » Physics » Heat and Mass Transfer » Heat Exchanger » Transverse Fin Heat Exchanger » Mechanical » Fin Parameters » Equivalent diameter

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Created by Nishan Poojary

Shri Madhwa Vadiraja Institute of Technology and Management (SMVITM), Udupi

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Equivalent diameter Formula

Equivalent Diameter = 2*(Surface Area+Bare Area)/(pi*Perimeter)
De = 2*(A_s+AB)/(pi*P)

What is heat exchanger?

A heat exchanger is a system used to transfer heat between two or more fluids. Heat exchangers are used in both cooling and heating processes. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants, petrochemical plants, petroleum refineries, natural-gas processing, and sewage treatment. The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air. Another example is the heat sink, which is a passive heat exchanger that transfers the heat generated by an electronic or a mechanical device to a fluid medium, often air or a liquid coolant.

How to Calculate Equivalent diameter?

Equivalent diameter calculator uses Equivalent Diameter = 2*(Surface Area+Bare Area)/(pi*Perimeter) to calculate 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 calculate Equivalent diameter using this online calculator? To use this online calculator for Equivalent diameter, enter Surface Area (A_s), Bare Area (AB) & Perimeter (P) and hit the calculate button. Here is how the Equivalent diameter calculation can be explained with given input values -> 0.02139 = 2*(0.52+0.32)/(pi*25).

FAQ

What is Equivalent diameter?

The Equivalent diameter formula is defined as the diameter of a circle with an equal aggregate sectional area and is represented as De = 2*(A_s+AB)/(pi*P) or Equivalent Diameter = 2*(Surface Area+Bare Area)/(pi*Perimeter). Surface Area of a three-dimensional shape is the sum of all of the surface areas of each of the sides, Bare area of fin over the fin leaving fin base & The perimeter of a figure is the total distance around the edge of the figure.

How to calculate Equivalent diameter?

The Equivalent diameter formula is defined as the diameter of a circle with an equal aggregate sectional area is calculated using Equivalent Diameter = 2*(Surface Area+Bare Area)/(pi*Perimeter). To calculate Equivalent diameter, you need Surface Area (A_s), Bare Area (AB) & Perimeter (P). With our tool, you need to enter the respective value for Surface Area, Bare Area & Perimeter 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?

In this formula, Equivalent Diameter uses Surface Area, Bare Area & Perimeter. We can use 1 other way(s) to calculate the same, which is/are as follows -

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

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