Brake Thermal Efficiency Calculator

✖Brake Power is the power obtained at the engine flywheel and is measured with the help of a dynamometer.ⓘ Brake Power [BP]			+10% -10%
✖Heat Energy is the amount of total heat required.ⓘ Heat Energy [Q]			+10% -10%

✖Brake Thermal Efficiency (in %) is defined as the brake power of a heat engine as a function of the thermal input from the fuel.ⓘ Brake Thermal Efficiency [η_bth]

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Formula

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Brake Thermal Efficiency

Formula

`"η"_{"bth"} = "BP"/"Q"`

Example

`"45.2381"="190kW"/"4200J"`

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Brake Thermal Efficiency Solution

STEP 0: Pre-Calculation Summary

Formula Used

Brake Thermal Efficiency = Brake Power/Heat Energy
η_bth = BP/Q
This formula uses 3 Variables

Variables Used

Brake Thermal Efficiency - Brake Thermal Efficiency (in %) is defined as the brake power of a heat engine as a function of the thermal input from the fuel.
Brake Power - (Measured in Watt) - Brake Power is the power obtained at the engine flywheel and is measured with the help of a dynamometer.
Heat Energy - (Measured in Joule) - Heat Energy is the amount of total heat required.

STEP 1: Convert Input(s) to Base Unit

Brake Power: 190 Kilowatt --> 190000 Watt (Check conversion here)
Heat Energy: 4200 Joule --> 4200 Joule No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

η_bth = BP/Q --> 190000/4200

Evaluating ... ...

η_bth = 45.2380952380952

STEP 3: Convert Result to Output's Unit

45.2380952380952 --> No Conversion Required

FINAL ANSWER

45.2380952380952 ≈ 45.2381 <-- Brake Thermal Efficiency

(Calculation completed in 00.004 seconds)

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Created by Anirudh Singh

National Institute of Technology (NIT), Jamshedpur

Anirudh Singh has created this Calculator and 300+ more calculators!

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Brayton Cycle Efficiency

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Thermal Efficiency given Mechanical Energy

Go Thermal Efficiency given Mechanical energy = Mechanical Energy/Thermal Energy

Thermal Efficiency given Waste Energy

Go Thermal efficiency given Waste energy = 1-Waste Heat/Thermal Energy

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

Go Carnot Cycle Efficiency = 1-Initial Temperature/Final Temperature

Nozzle Efficiency

Go Nozzle Efficiency = Change in Kinetic Energy/Kinetic Energy

Indicated Thermal Efficiency

Go Indicated Thermal Efficiency = Brake Power/Heat Energy

Thermal Efficiency of Heat Engine

Go Thermal Efficiency of Heat Engine = Work/Heat Energy

Cooled Compressor Efficiency

Go Cooled Compressor Efficiency = Kinetic Energy/Work

Brake Thermal Efficiency

Go Brake Thermal Efficiency = Brake Power/Heat Energy

Otto Cycle Efficiency

Go OTE = 1-Initial Temperature/Final Temperature

Compressor Efficiency

Go Compressor Efficiency = Kinetic Energy/Work

Turbine Efficiency

Go Turbine Efficiency = Work/Kinetic Energy

Ranking Cycle Efficiency

Go Ranking Cycle = 1-Heat Ratio

Brake Thermal Efficiency Formula

Brake Thermal Efficiency = Brake Power/Heat Energy
η_bth = BP/Q

What is Brake Thermal Efficiency?

Brake Thermal Efficiency is the ratio of energy in the brake power to the fuel energy. It is used to evaluate how well an engine converts the heat from a fuel to mechanical energy.

How to Calculate Brake Thermal Efficiency?

Brake Thermal Efficiency calculator uses Brake Thermal Efficiency = Brake Power/Heat Energy to calculate the Brake Thermal Efficiency, Brake Thermal Efficiency is defined as break power of a heat engine as a function of the thermal input from the fuel. Brake Thermal Efficiency is denoted by η_bth symbol.

How to calculate Brake Thermal Efficiency using this online calculator? To use this online calculator for Brake Thermal Efficiency, enter Brake Power (BP) & Heat Energy (Q) and hit the calculate button. Here is how the Brake Thermal Efficiency calculation can be explained with given input values -> 45.2381 = 190000/4200.

FAQ

What is Brake Thermal Efficiency?

Brake Thermal Efficiency is defined as break power of a heat engine as a function of the thermal input from the fuel and is represented as η_bth = BP/Q or Brake Thermal Efficiency = Brake Power/Heat Energy. Brake Power is the power obtained at the engine flywheel and is measured with the help of a dynamometer & Heat Energy is the amount of total heat required.

How to calculate Brake Thermal Efficiency?

Brake Thermal Efficiency is defined as break power of a heat engine as a function of the thermal input from the fuel is calculated using Brake Thermal Efficiency = Brake Power/Heat Energy. To calculate Brake Thermal Efficiency, you need Brake Power (BP) & Heat Energy (Q). With our tool, you need to enter the respective value for Brake Power & Heat Energy and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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