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Brake Thermal Efficiency given Brake Power Formula

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Brake Thermal Efficiency (in %) is defined as the brake power of a heat engine as a function of the thermal input from the fuel. Check FAQs

η b = (\frac{BP}{m f \cdot CV}) \cdot 100

η_b - Brake Thermal Efficiency?BP - Brake Power?m_f - Mass of Fuel Supplied per Second?CV - Calorific Value of Fuel?

Brake Thermal Efficiency given Brake Power Example

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Here is how the Brake Thermal Efficiency given Brake Power equation looks like with Values.

Here is how the Brake Thermal Efficiency given Brake Power equation looks like with Units.

Here is how the Brake Thermal Efficiency given Brake Power equation looks like.

0.2455 = (\frac{0.55}{0.14 \cdot 1600}) \cdot 100

0.2455 = (\frac{0.55kW}{0.14kg/s \cdot 1600kJ/kg}) \cdot 100

0.2455 = (\frac{0.55}{0.14 \cdot 1600}) \cdot 100

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Brake Thermal Efficiency given Brake Power Solution

Follow our step by step solution on how to calculate Brake Thermal Efficiency given Brake Power?

FIRST Step Consider the formula

η b = (\frac{BP}{m f \cdot CV}) \cdot 100

Next Step Substitute values of Variables

∴

η b = (\frac{0.55kW}{0.14kg/s \cdot 1600kJ/kg}) \cdot 100

Next Step Convert Units

∴

η b = (\frac{550W}{0.14kg/s \cdot 1.6E+6J/kg}) \cdot 100

Next Step Prepare to Evaluate

∴

η b = (\frac{550}{0.14 \cdot 1.6E+6}) \cdot 100

Next Step Evaluate

∴

η b = 0.245535714285714

LAST Step Rounding Answer

∴

η b = 0.2455

Brake Thermal Efficiency given Brake Power Formula Elements

Variables

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.

Symbol: η_b

Measurement: NAUnit: Unitless

Note: Value should be between 0 to 1.

Formulas to find Brake Thermal Efficiency

Brake Power

Brake Power is the power available at the crankshaft.

Symbol: BP

Measurement: PowerUnit: kW

Note: Value should be greater than 0.

Formulas to find Brake Power

Mass of Fuel Supplied per Second

Mass of Fuel Supplied per Second is the amount of the mass of the fuel that is supplied per second to an engine or to a system.

Symbol: m_f

Measurement: Mass Flow RateUnit: kg/s

Note: Value should be greater than 0.

Formulas to find Mass of Fuel Supplied per Second

Calorific Value of Fuel

Calorific value of Fuel is the amount of energy released or produced when 1 kg of fuel burns or any other substance is burnt in the presence of oxygen.

Symbol: CV

Measurement: Specific EnergyUnit: kJ/kg

Note: Value should be greater than 0.

Formulas to find Calorific Value of Fuel

Other formulas in Important Formulas of Engine Dynamics category

Go Brake Power given Mean Effective Pressure

BP = (P mb \cdot L \cdot A \cdot (N))

Go Mechanical Efficiency of IC engine

η m = (\frac{BP}{IP}) \cdot 100

Go Brake Power given Mechanical Efficiency

BP = (\frac{η m}{100}) \cdot IP

Go Indicated Power given Mechanical Efficiency

IP = \frac{BP}{\frac{η m}{100}}

How to Evaluate Brake Thermal Efficiency given Brake Power?

Brake Thermal Efficiency given Brake Power evaluator uses Brake Thermal Efficiency = (Brake Power/(Mass of Fuel Supplied per Second*Calorific Value of Fuel))*100 to evaluate the Brake Thermal Efficiency, The Brake Thermal Efficiency given Brake Power formula is defined as the ratio of brake power and product of mass of fuel supplied per second and calorific value of the fuel. Brake Thermal Efficiency is denoted by η_b symbol.

How to evaluate Brake Thermal Efficiency given Brake Power using this online evaluator? To use this online evaluator for Brake Thermal Efficiency given Brake Power, enter Brake Power (BP), Mass of Fuel Supplied per Second (m_f) & Calorific Value of Fuel (CV) and hit the calculate button.

FAQs on Brake Thermal Efficiency given Brake Power

What is the formula to find Brake Thermal Efficiency given Brake Power?

The formula of Brake Thermal Efficiency given Brake Power is expressed as Brake Thermal Efficiency = (Brake Power/(Mass of Fuel Supplied per Second*Calorific Value of Fuel))*100. Here is an example- 0.245536 = (550/(0.14*1600000))*100.

How to calculate Brake Thermal Efficiency given Brake Power?

With Brake Power (BP), Mass of Fuel Supplied per Second (m_f) & Calorific Value of Fuel (CV) we can find Brake Thermal Efficiency given Brake Power using the formula - Brake Thermal Efficiency = (Brake Power/(Mass of Fuel Supplied per Second*Calorific Value of Fuel))*100.

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Brake Thermal Efficiency given Brake Power Formula

Brake Thermal Efficiency given Brake Power Example

Brake Thermal Efficiency given Brake Power Solution

Brake Thermal Efficiency given Brake Power Formula Elements

Other formulas in Important Formulas of Engine Dynamics category

How to Evaluate Brake Thermal Efficiency given Brake Power?

FAQs on Brake Thermal Efficiency given Brake Power

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