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Indicated Thermal Efficiency Formula

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Indicated Thermal Efficiency is given by the ratio of indicated power generated by the engine to the power generated by the combustion of the fuel. Check FAQs

IDE = \frac{BP}{Q}

IDE - Indicated Thermal Efficiency?BP - Brake Power?Q - Heat Energy?

Indicated Thermal Efficiency Example

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Here is how the Indicated Thermal Efficiency equation looks like with Values.

Here is how the Indicated Thermal Efficiency equation looks like with Units.

Here is how the Indicated Thermal Efficiency equation looks like.

45.2381 = \frac{190}{4200}

45.2381 = \frac{190kW}{4200J}

45.2381 = \frac{190}{4200}

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Indicated Thermal Efficiency Solution

Follow our step by step solution on how to calculate Indicated Thermal Efficiency?

FIRST Step Consider the formula

IDE = \frac{BP}{Q}

Next Step Substitute values of Variables

∴

IDE = \frac{190kW}{4200J}

Next Step Convert Units

∴

IDE = \frac{190000W}{4200J}

Next Step Prepare to Evaluate

∴

IDE = \frac{190000}{4200}

Next Step Evaluate

∴

IDE = 45.2380952380952

LAST Step Rounding Answer

∴

IDE = 45.2381

Indicated Thermal Efficiency Formula Elements

Variables

Indicated Thermal Efficiency

Indicated Thermal Efficiency is given by the ratio of indicated power generated by the engine to the power generated by the combustion of the fuel.

Symbol: IDE

Measurement: NAUnit: Unitless

Note: Value should be between 0 to 100.

Formulas to find Indicated Thermal Efficiency

Brake Power

Brake Power is the power obtained at the engine flywheel and is measured with the help of a dynamometer.

Symbol: BP

Measurement: PowerUnit: kW

Note: Value should be greater than 0.

Formulas to find Brake Power

Heat Energy

Heat Energy is the amount of total heat required.

Symbol: Q

Measurement: EnergyUnit: J

Note: Value should be greater than 0.

Formulas to find Heat Energy

Other formulas in Thermal Efficiency category

Go Brake Thermal Efficiency

η bth = \frac{BP}{Q}

Go Brayton Cycle Efficiency

BCE = 1 - \frac{1}{{r p}^{\frac{Y - 1}{Y}}}

Go Carnot Cycle Efficiency of Heat Engine using Temperature of Source and Sink

n' = 1 - \frac{T i}{T f}

Go Compressor Efficiency

CE = \frac{KE}{W}

How to Evaluate Indicated Thermal Efficiency?

Indicated Thermal Efficiency evaluator uses Indicated Thermal Efficiency = Brake Power/Heat Energy to evaluate the Indicated Thermal Efficiency, Indicated Thermal Efficiency is the ratio of Indicated power to the fuel power generated through combustion. Indicated Thermal Efficiency is denoted by IDE symbol.

How to evaluate Indicated Thermal Efficiency using this online evaluator? To use this online evaluator for Indicated Thermal Efficiency, enter Brake Power (BP) & Heat Energy (Q) and hit the calculate button.

FAQs on Indicated Thermal Efficiency

What is the formula to find Indicated Thermal Efficiency?

The formula of Indicated Thermal Efficiency is expressed as Indicated Thermal Efficiency = Brake Power/Heat Energy. Here is an example- 45.2381 = 190000/4200.

How to calculate Indicated Thermal Efficiency?

With Brake Power (BP) & Heat Energy (Q) we can find Indicated Thermal Efficiency using the formula - Indicated Thermal Efficiency = Brake Power/Heat Energy.

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