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

✖Brake Mean Effective Pressure is a measure of the average pressure exerted on the piston during the power stroke, and is calculated by dividing net work output of engine by the displacement volume.ⓘ Brake Mean Effective Pressure [BMEP]			+10% -10%
✖Piston Area is defined as the total space occupied by the piston of a diesel engine.ⓘ Piston Area [A]			+10% -10%
✖Stroke of Piston is the distance that the piston travels between its top dead center (TDC) and bottom dead center (BDC) positions during each cycle of the engine.ⓘ Stroke of Piston [L]			+10% -10%
✖RPM is speed in Rotation per Minute.ⓘ RPM [N]			+10% -10%
✖Number of Cylinders is the number of cylinders present in the diesel engine.ⓘ Number of Cylinders [N_c]			+10% -10%
✖Fuel Consumption Rate refers to the rate at which fuel is consumed by the engine.ⓘ Fuel Consumption Rate [m_f]			+10% -10%
✖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.ⓘ Calorific Value [CV]			+10% -10%

✖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.ⓘ Overall Efficiency or Brake Thermal Efficiency using Brake Mean Effective Pressure [BTE]

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Formula

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Overall Efficiency or Brake Thermal Efficiency using Brake Mean Effective Pressure

Formula

`"BTE" = ("BMEP"*"A"*"L"*("N"/2)*"N"_{"c"})/("m"_{"f"}*"CV"*60)`

Example

`"0.370967"=("4.76Bar"*"0.166m²"*"600mm"*("7000rad/s"/2)*"2")/("0.355kg/s"*"42000kJ/kg"*60)`

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

STEP 0: Pre-Calculation Summary

Formula Used

Brake Thermal Efficiency = (Brake Mean Effective Pressure*Piston Area*Stroke of Piston*(RPM/2)*Number of Cylinders)/(Fuel Consumption Rate*Calorific Value*60)
BTE = (BMEP*A*L*(N/2)*N_c)/(m_f*CV*60)
This formula uses 8 Variables

Variables Used

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.
Brake Mean Effective Pressure - (Measured in Pascal) - Brake Mean Effective Pressure is a measure of the average pressure exerted on the piston during the power stroke, and is calculated by dividing net work output of engine by the displacement volume.
Piston Area - (Measured in Square Meter) - Piston Area is defined as the total space occupied by the piston of a diesel engine.
Stroke of Piston - (Measured in Meter) - Stroke of Piston is the distance that the piston travels between its top dead center (TDC) and bottom dead center (BDC) positions during each cycle of the engine.
RPM - (Measured in Radian per Second) - RPM is speed in Rotation per Minute.
Number of Cylinders - Number of Cylinders is the number of cylinders present in the diesel engine.
Fuel Consumption Rate - (Measured in Kilogram per Second) - Fuel Consumption Rate refers to the rate at which fuel is consumed by the engine.
Calorific Value - (Measured in Joule per Kilogram) - 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.

STEP 1: Convert Input(s) to Base Unit

Brake Mean Effective Pressure: 4.76 Bar --> 476000 Pascal (Check conversion here)
Piston Area: 0.166 Square Meter --> 0.166 Square Meter No Conversion Required
Stroke of Piston: 600 Millimeter --> 0.6 Meter (Check conversion here)
RPM: 7000 Radian per Second --> 7000 Radian per Second No Conversion Required
Number of Cylinders: 2 --> No Conversion Required
Fuel Consumption Rate: 0.355 Kilogram per Second --> 0.355 Kilogram per Second No Conversion Required
Calorific Value: 42000 Kilojoule per Kilogram --> 42000000 Joule per Kilogram (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

BTE = (BMEP*A*L*(N/2)*N_c)/(m_f*CV*60) --> (476000*0.166*0.6*(7000/2)*2)/(0.355*42000000*60)

Evaluating ... ...

BTE = 0.370967136150235

STEP 3: Convert Result to Output's Unit

0.370967136150235 --> No Conversion Required

FINAL ANSWER

0.370967136150235 ≈ 0.370967 <-- Brake Thermal Efficiency

(Calculation completed in 00.007 seconds)

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Indian Institute of Technology,Roorlee (IITR), Roorkee

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< 25 Diesel Engine Power Plant Calculators

Overall Efficiency or Brake Thermal Efficiency using Brake Mean Effective Pressure

Go Brake Thermal Efficiency = (Brake Mean Effective Pressure*Piston Area*Stroke of Piston*(RPM/2)*Number of Cylinders)/(Fuel Consumption Rate*Calorific Value*60)

Break Power given Bore and Stroke

Go Brake Power of 4 Stroke = (Mechanical Efficiency*Indicated Mean Effective Pressure*Piston Area*Stroke of Piston*(RPM/2)*Number of Cylinders)/60

Indicated Power of 2 Stroke Engine

Go Indicated Power of 2 Stroke Engine = (Indicated Mean Effective Pressure*Piston Area*Stroke of Piston*RPM*Number of Cylinders)/60

Indicated Power of 4 Stroke Engine

Go Indicated Power of 4 Stroke = (Indicated Mean Effective Pressure*Piston Area*Stroke of Piston*(RPM/2)*Number of Cylinders)/60

Brake Power using Break Mean Effective Pressure

Go Brake Power of 4 Stroke = (Brake Mean Effective Pressure*Piston Area*Stroke of Piston*(RPM/2)*Number of Cylinders)/60

Overall Efficiency or Brake Thermal Efficiency using Mechanical Efficiency

Go Brake Thermal Efficiency = (Mechanical Efficiency*Indicated Power of 4 Stroke)/(Fuel Consumption Rate*Calorific Value)

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

Go Brake Thermal Efficiency = (Indicated Power of 4 Stroke-Friction Power)/(Fuel Consumption Rate*Calorific Value)

Thermal Efficiency using Indicated Mean Effective Pressure and Break Mean Effective Pressure

Go Indicated Thermal Efficiency = Brake Thermal Efficiency*Indicated Mean Effective Pressure/Brake Mean Effective Pressure

Thermal Efficiency using Indicated Power and Brake Power

Go Indicated Thermal Efficiency = Brake Thermal Efficiency*Indicated Power of 4 Stroke/Brake Power of 4 Stroke

Thermal Efficiency using Indicated Power and Fuel Consumption Rate

Go Indicated Thermal Efficiency = Indicated Power of 4 Stroke/(Fuel Consumption Rate*Calorific Value)

Mechanical Efficiency using Indicated Power and Friction Power

Go Mechanical Efficiency = (Indicated Power of 4 Stroke-Friction Power)/Indicated Power of 4 Stroke

Brake Thermal Efficiency of Diesel Engine Power Plant

Go Brake Thermal Efficiency = Brake Power of 4 Stroke/(Fuel Consumption Rate*Calorific Value)

Mechanical Efficiency using Break Power and Friction Power

Go Mechanical Efficiency = Brake Power of 4 Stroke/(Brake Power of 4 Stroke+Friction Power)

Work Done per Cycle

Go Work = Indicated Mean Effective Pressure*Piston Area*Stroke of Piston

Brake Mean Effective Pressure

Go Brake Mean Effective Pressure = Mechanical Efficiency*Indicated Mean Effective Pressure

Break Power of 4 Stroke Diesel Engine

Go Brake Power of 4 Stroke = (2*pi*Torque*(RPM/2))/60

Brake Specific Fuel Consumption given Brake Power and Fuel Consumption Rate

Go Brake Specific Fuel Consumption = Fuel Consumption Rate/Brake Power of 4 Stroke

Break Power of 2 Stroke Diesel Engine

Go Brake Power of 2 Stroke = (2*pi*Torque*RPM)/60

Thermal Efficiency of Diesel Engine Power Plant

Go Indicated Thermal Efficiency = Brake Thermal Efficiency/Mechanical Efficiency

Break Power given Mechanical Efficiency and Indicated Power

Go Brake Power of 4 Stroke = Mechanical Efficiency*Indicated Power of 4 Stroke

Mechanical Efficiency of Diesel Engine

Go Mechanical Efficiency = Brake Power of 4 Stroke/Indicated Power of 4 Stroke

Indicated Power using Brake Power and Friction Power

Go Indicated Power of 4 Stroke = Brake Power of 4 Stroke+Friction Power

Friction Power of Diesel Engine

Go Friction Power = Indicated Power of 4 Stroke-Brake Power of 4 Stroke

Brake Mean Effective Pressure given Torque

Go Brake Mean Effective Pressure = Proportionality Constant*Torque

Area of Piston given Piston Bore

Go Piston Area = (pi/4)*Piston Bore^2

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

Brake Thermal Efficiency = (Brake Mean Effective Pressure*Piston Area*Stroke of Piston*(RPM/2)*Number of Cylinders)/(Fuel Consumption Rate*Calorific Value*60)
BTE = (BMEP*A*L*(N/2)*N_c)/(m_f*CV*60)

On what factors the efficiency depends?

The efficiency of a diesel engine power plant can vary depending on a number of factors, including the design of the engine, the quality of the fuel being used, and the operating conditions of the plant. Generally speaking, diesel engines are known for their high thermal efficiency, which is the ratio of the energy output of the engine to the energy input from the fuel.

How to Calculate Overall Efficiency or Brake Thermal Efficiency using Brake Mean Effective Pressure?

Overall Efficiency or Brake Thermal Efficiency using Brake Mean Effective Pressure calculator uses Brake Thermal Efficiency = (Brake Mean Effective Pressure*Piston Area*Stroke of Piston*(RPM/2)*Number of Cylinders)/(Fuel Consumption Rate*Calorific Value*60) to calculate the Brake Thermal Efficiency, The Overall Efficiency or Brake Thermal Efficiency using Brake Mean Effective Pressure 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 calculate Overall Efficiency or Brake Thermal Efficiency using Brake Mean Effective Pressure using this online calculator? To use this online calculator for Overall Efficiency or Brake Thermal Efficiency using Brake Mean Effective Pressure, enter Brake Mean Effective Pressure (BMEP), Piston Area (A), Stroke of Piston (L), RPM (N), Number of Cylinders (N_c), Fuel Consumption Rate (m_f) & Calorific Value (CV) and hit the calculate button. Here is how the Overall Efficiency or Brake Thermal Efficiency using Brake Mean Effective Pressure calculation can be explained with given input values -> 0.370967 = (476000*0.166*0.6*(7000/2)*2)/(0.355*42000000*60).

FAQ

What is Overall Efficiency or Brake Thermal Efficiency using Brake Mean Effective Pressure?

The Overall Efficiency or Brake Thermal Efficiency using Brake Mean Effective Pressure formula is defined as a measure of how effectively an engine converts the chemical energy in its fuel into useful mechanical work and is represented as BTE = (BMEP*A*L*(N/2)*N_c)/(m_f*CV*60) or Brake Thermal Efficiency = (Brake Mean Effective Pressure*Piston Area*Stroke of Piston*(RPM/2)*Number of Cylinders)/(Fuel Consumption Rate*Calorific Value*60). Brake Mean Effective Pressure is a measure of the average pressure exerted on the piston during the power stroke, and is calculated by dividing net work output of engine by the displacement volume, Piston Area is defined as the total space occupied by the piston of a diesel engine, Stroke of Piston is the distance that the piston travels between its top dead center (TDC) and bottom dead center (BDC) positions during each cycle of the engine, RPM is speed in Rotation per Minute, Number of Cylinders is the number of cylinders present in the diesel engine, Fuel Consumption Rate refers to the rate at which fuel is consumed by the engine & 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.

How to calculate Overall Efficiency or Brake Thermal Efficiency using Brake Mean Effective Pressure?

The Overall Efficiency or Brake Thermal Efficiency using Brake Mean Effective Pressure formula is defined as a measure of how effectively an engine converts the chemical energy in its fuel into useful mechanical work is calculated using Brake Thermal Efficiency = (Brake Mean Effective Pressure*Piston Area*Stroke of Piston*(RPM/2)*Number of Cylinders)/(Fuel Consumption Rate*Calorific Value*60). To calculate Overall Efficiency or Brake Thermal Efficiency using Brake Mean Effective Pressure, you need Brake Mean Effective Pressure (BMEP), Piston Area (A), Stroke of Piston (L), RPM (N), Number of Cylinders (N_c), Fuel Consumption Rate (m_f) & Calorific Value (CV). With our tool, you need to enter the respective value for Brake Mean Effective Pressure, Piston Area, Stroke of Piston, RPM, Number of Cylinders, Fuel Consumption Rate & Calorific Value and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Brake Thermal Efficiency?

In this formula, Brake Thermal Efficiency uses Brake Mean Effective Pressure, Piston Area, Stroke of Piston, RPM, Number of Cylinders, Fuel Consumption Rate & Calorific Value. We can use 4 other way(s) to calculate the same, which is/are as follows -

Brake Thermal Efficiency = Brake Power of 4 Stroke/(Fuel Consumption Rate*Calorific Value)
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 = Indicated Thermal Efficiency*Mechanical Efficiency

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