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Brake Thermal Efficiency of Diesel Engine Power Plant Formula

GoOverall Efficiency or Brake Thermal Efficiency using Mechanical Efficiency Formula

GoOverall Efficiency or Brake Thermal Efficiency using Friction Power and Indicated Power Formula

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Brake Thermal Efficiency is defined as the ratio of the net work output of the engine to the energy input from the fuel, expressed as a percentage. Check FAQs

BTE = \frac{P 4b}{m f \cdot CV}

BTE - Brake Thermal Efficiency?P_4b - Brake Power of 4 Stroke?m_f - Fuel Consumption Rate?CV - Calorific Value?

Brake Thermal Efficiency of Diesel Engine Power Plant Example

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Here is how the Brake Thermal Efficiency of Diesel Engine Power Plant equation looks like with Values.

Here is how the Brake Thermal Efficiency of Diesel Engine Power Plant equation looks like with Units.

Here is how the Brake Thermal Efficiency of Diesel Engine Power Plant equation looks like.

0.3714 = \frac{5537}{0.355 \cdot 42000}

0.3714 = \frac{5537kW}{0.355kg/s \cdot 42000kJ/kg}

0.3714 = \frac{5537}{0.355 \cdot 42000}

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Brake Thermal Efficiency of Diesel Engine Power Plant Solution

Follow our step by step solution on how to calculate Brake Thermal Efficiency of Diesel Engine Power Plant?

FIRST Step Consider the formula

BTE = \frac{P 4b}{m f \cdot CV}

Next Step Substitute values of Variables

∴

BTE = \frac{5537kW}{0.355kg/s \cdot 42000kJ/kg}

Next Step Convert Units

∴

BTE = \frac{5.5E+6W}{0.355kg/s \cdot 4.2E+7J/kg}

Next Step Prepare to Evaluate

∴

BTE = \frac{5.5E+6}{0.355 \cdot 4.2E+7}

Next Step Evaluate

∴

BTE = 0.371361502347418

LAST Step Rounding Answer

∴

BTE = 0.3714

Brake Thermal Efficiency of Diesel Engine Power Plant Formula Elements

Variables

Brake Thermal Efficiency

Brake Thermal Efficiency is defined as the ratio of the net work output of the engine to the energy input from the fuel, expressed as a percentage.

Symbol: BTE

Measurement: NAUnit: Unitless

Note: Value should be less than 1.

Formulas to find Brake Thermal Efficiency

Brake Power of 4 Stroke

Brake Power of 4 Stroke is the output of the engine at the shaft measured by a dynamometer in a 4 stroke diesel engine.

Symbol: P_4b

Measurement: PowerUnit: kW

Note: Value should be greater than 0.

Formulas to find Brake Power of 4 Stroke

Fuel Consumption Rate

Fuel Consumption Rate refers to the rate at which fuel is consumed by the engine.

Symbol: m_f

Measurement: Mass Flow RateUnit: kg/s

Note: Value should be greater than 0.

Formulas to find Fuel Consumption Rate

Calorific Value

Calorific Value is a measure of the amount of energy contained in a unit of fuel. It is a measure of the energy released when the fuel is burned.

Symbol: CV

Measurement: Heat of Combustion (per Mass)Unit: kJ/kg

Note: Value should be greater than 0.

Formulas to find Calorific Value

Other Formulas to find Brake Thermal Efficiency

Go Overall Efficiency or Brake Thermal Efficiency using Mechanical Efficiency

BTE = \frac{η m \cdot P 4i}{m f \cdot CV}

Go Overall Efficiency or Brake Thermal Efficiency using Friction Power and Indicated Power

BTE = \frac{P 4i - P f}{m f \cdot CV}

Go Overall Efficiency or Brake Thermal Efficiency using Brake Mean Effective Pressure

BTE = \frac{BMEP \cdot A \cdot L \cdot (\frac{N}{2}) \cdot N c}{m f \cdot CV \cdot 60}

Go Overall Efficiency of Diesel Engine Power Plant

BTE = ITE \cdot η m

Other formulas in Diesel Engine Power Plant category

Go Area of Piston given Piston Bore

A = (\frac{π}{4}) \cdot B^{2}

Go Work Done per Cycle

W = IMEP \cdot A \cdot L

Go Indicated Power of 2 Stroke Engine

P i2 = \frac{IMEP \cdot A \cdot L \cdot N \cdot N c}{60}

Go Indicated Power of 4 Stroke Engine

P 4i = \frac{IMEP \cdot A \cdot L \cdot (\frac{N}{2}) \cdot N c}{60}

How to Evaluate Brake Thermal Efficiency of Diesel Engine Power Plant?

Brake Thermal Efficiency of Diesel Engine Power Plant evaluator uses Brake Thermal Efficiency = Brake Power of 4 Stroke/(Fuel Consumption Rate*Calorific Value) to evaluate the Brake Thermal Efficiency, The Brake Thermal Efficiency of Diesel Engine Power Plant formula is defined as a measure of how effectively an engine converts the chemical energy in its fuel into useful mechanical work. Brake Thermal Efficiency is denoted by BTE symbol.

How to evaluate Brake Thermal Efficiency of Diesel Engine Power Plant using this online evaluator? To use this online evaluator for Brake Thermal Efficiency of Diesel Engine Power Plant, enter Brake Power of 4 Stroke (P_4b), Fuel Consumption Rate (m_f) & Calorific Value (CV) and hit the calculate button.

FAQs on Brake Thermal Efficiency of Diesel Engine Power Plant

What is the formula to find Brake Thermal Efficiency of Diesel Engine Power Plant?

The formula of Brake Thermal Efficiency of Diesel Engine Power Plant is expressed as Brake Thermal Efficiency = Brake Power of 4 Stroke/(Fuel Consumption Rate*Calorific Value). Here is an example- 0.371362 = 5537000/(0.355*42000000).

How to calculate Brake Thermal Efficiency of Diesel Engine Power Plant?

With Brake Power of 4 Stroke (P_4b), Fuel Consumption Rate (m_f) & Calorific Value (CV) we can find Brake Thermal Efficiency of Diesel Engine Power Plant using the formula - Brake Thermal Efficiency = Brake Power of 4 Stroke/(Fuel Consumption Rate*Calorific Value).

What are the other ways to Calculate Brake Thermal Efficiency?

Here are the different ways to Calculate Brake Thermal Efficiency-

Brake Thermal Efficiency=(Mechanical Efficiency*Indicated Power of 4 Stroke)/(Fuel Consumption Rate*Calorific Value)
Brake Thermal Efficiency=(Indicated Power of 4 Stroke-Friction Power)/(Fuel Consumption Rate*Calorific Value)
Brake Thermal Efficiency=(Brake Mean Effective Pressure*Piston Area*Stroke of Piston*(RPM/2)*Number of Cylinders)/(Fuel Consumption Rate*Calorific Value*60)

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Brake Thermal Efficiency of Diesel Engine Power Plant Formula

​GoOverall Efficiency or Brake Thermal Efficiency using Mechanical Efficiency Formula

​GoOverall Efficiency or Brake Thermal Efficiency using Friction Power and Indicated Power Formula

Brake Thermal Efficiency of Diesel Engine Power Plant Example

Brake Thermal Efficiency of Diesel Engine Power Plant Solution

Brake Thermal Efficiency of Diesel Engine Power Plant Formula Elements

Other Formulas to find Brake Thermal Efficiency

Other formulas in Diesel Engine Power Plant category

How to Evaluate Brake Thermal Efficiency of Diesel Engine Power Plant?

FAQs on Brake Thermal Efficiency of Diesel Engine Power Plant

Variable Name

GoOverall Efficiency or Brake Thermal Efficiency using Mechanical Efficiency Formula

GoOverall Efficiency or Brake Thermal Efficiency using Friction Power and Indicated Power Formula