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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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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Home » Engineering » Mechanical » Thermodynamics » Thermal Efficiency » Brake Thermal Efficiency

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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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Brake Thermal Efficiency Formula

LaTeX Go

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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