✖Work Done per Cycle in IC Engine is defined as work done to push the piston downwards during the power stroke of the otto cycle in IC engine.ⓘ Work Done per Cycle in IC Engine [W]			+10% -10%
✖Heat added by combustion per cycle is defined as the amount of heat energy liberated from the combustion of the fuel in one working cycle.ⓘ Heat Added by Combustion per Cycle [Q_in]			+10% -10%

✖Thermal efficiency of ic engine is defined as the ratio of work done per cycle to the actual heat input per cycle in ic engine.ⓘ Thermal efficiency of IC engine [η_th]

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Formula

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Thermal efficiency of IC engine

Formula

`"η"_{"th"} = "W"/"Q"_{"in"}`

Example

`"0.666667"="100KJ"/"150kJ/kg"`

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Thermal efficiency of IC engine Solution

STEP 0: Pre-Calculation Summary

Formula Used

Thermal Efficiency of IC Engine = Work Done per Cycle in IC Engine/Heat Added by Combustion per Cycle
η_th = W/Q_in
This formula uses 3 Variables

Variables Used

Thermal Efficiency of IC Engine - Thermal efficiency of ic engine is defined as the ratio of work done per cycle to the actual heat input per cycle in ic engine.
Work Done per Cycle in IC Engine - (Measured in Joule) - Work Done per Cycle in IC Engine is defined as work done to push the piston downwards during the power stroke of the otto cycle in IC engine.
Heat Added by Combustion per Cycle - (Measured in Joule per Kilogram) - Heat added by combustion per cycle is defined as the amount of heat energy liberated from the combustion of the fuel in one working cycle.

STEP 1: Convert Input(s) to Base Unit

Work Done per Cycle in IC Engine: 100 Kilojoule --> 100000 Joule (Check conversion here)
Heat Added by Combustion per Cycle: 150 Kilojoule per Kilogram --> 150000 Joule per Kilogram (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

η_th = W/Q_in --> 100000/150000

Evaluating ... ...

η_th = 0.666666666666667

STEP 3: Convert Result to Output's Unit

0.666666666666667 --> No Conversion Required

FINAL ANSWER

0.666666666666667 ≈ 0.666667 <-- Thermal Efficiency of IC Engine

(Calculation completed in 00.004 seconds)

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< 24 For 4 Stroke Engine Calculators

Volumetric efficiency of IC engine

Go Volumetric Efficiency of IC Engine = (Air Mass Flow Rate*Crankshaft Revolutions per Power Stroke)/(Air Density at Intake*Theoretical Volume of Engine*Engine Speed)

Rate of heat conduction of engine wall

Go Rate of Heat Conduction of Engine Wall = ((Thermal Conductivity of Material)*Surface Area of Engine Wall*Temperature Difference across Engine Wall)/Thickness of Engine Wall

Indicated Power of Four-stroke Engine

Go Indicated Power = (Number of Cylinders*Mean Effective Pressure*Stroke Length*Area of Cross Section*(Engine Speed))/(2)

Brake power measured with dynamo meter

Go Brake Power = (pi*Pulley Diameter*(Engine Speed*60)*(Dead Weight-Spring Scale Reading))/60

Volumetric Efficiency for 4S engines

Go Volumetric Efficiency = ((2*Air Mass Flow Rate)/(Air Density at Intake*Piston Swept Volume*(Engine Speed)))*100

Brake Mean Effective Pressure of 4S Engines given Brake power

Go Brake Mean Effective Pressure = (2*Brake Power)/(Stroke Length*Area of Cross Section*(Engine Speed))

Fuel conversion efficiency

Go Fuel Conversion Efficiency = Work Done per Cycle in IC Engine/(Mass of Fuel Added per Cycle*Heating Value of the Fuel)

Bmep given engine torque

Go Brake Mean Effective Pressure = (2*pi*Engine Torque*Engine Speed)/Mean Piston Speed

Combustion efficiency

Go Combustion Efficiency = Heat Added by Combustion per Cycle/(Mass of Fuel Added per Cycle*Heating Value of the Fuel)

Work done per cycle in ic engine

Go Work Done per Cycle in IC Engine = (Indicated Engine Power*Crankshaft Revolutions per Power Stroke)/Engine RPM

Intake air mass of engine cylinder

Go Mass of Air at Intake = (Air Mass Flow Rate*Crankshaft Revolutions per Power Stroke)/Engine RPM

Displaced volume in engine cylinder

Go Displaced Volume = (Piston Stroke*pi*(Engine Cylinder Bore in Meter^2))/4

Intake air density

Go Air Density at Intake = Intake Air Pressure/([R]*Intake Air Temperature)

Thermal efficiency of IC engine

Go Thermal Efficiency of IC Engine = Work Done per Cycle in IC Engine/Heat Added by Combustion per Cycle

Indicated mean effective pressure given mechanical efficiency

Go Indicated Mean Effective Pressure = Brake Mean Effective Pressure/Mechanical Efficiency of IC Engine

Frictional mean effective pressure

Go Frictional Mean Effective Pressure = Indicated Mean Effective Pressure-Brake Mean Effective Pressure

Volumetric efficiency of IC engine given actual volume of engine cylinder

Go Volumetric Efficiency of IC Engine = Actual Volume of Intake Air/Theoretical Volume of Engine

Connecting Rod Length to Crank Radius Ratio

Go Connecting Rod Length to Crank Radius Ratio = Connecting Rod Length/Crank Radius of Engine

Ratio of cylinder bore to piston stroke

Go Connecting Rod Length to Crank Radius Ratio = Connecting Rod Length/Crank Radius of Engine

Total cylinder volume of IC engine

Go Total Volume of an Engine = Total Number of Cylinders*Total Volume of Engine Cylinder

Fuel conversion efficiency given thermal conversion efficiency

Go Fuel Conversion Efficiency = Combustion Efficiency*Thermal Conversion Efficiency

Actual intake air volume per cylinder

Go Actual Volume of Intake Air = Mass of Air at Intake/Air Density at Intake

Frictional power of engine

Go Frictional Power of Engine = Indicated Power-Brake Power

Horsepower of engine

Go Horsepower of Engine = (Engine Torque*Engine RPM)/5252

Thermal efficiency of IC engine Formula

Thermal Efficiency of IC Engine = Work Done per Cycle in IC Engine/Heat Added by Combustion per Cycle
η_th = W/Q_in

What is thermal efficiency of IC engine?

The thermal efficiency of the IC engine is the ratio of work output to heat supplied to the engine. It is the work done to push the piston downwards during the power stroke of the otto cycle in ic engine.

How to Calculate Thermal efficiency of IC engine?

Thermal efficiency of IC engine calculator uses Thermal Efficiency of IC Engine = Work Done per Cycle in IC Engine/Heat Added by Combustion per Cycle to calculate the Thermal Efficiency of IC Engine, The Thermal efficiency of IC engine formula is defined as the ratio of the work done to push the piston downwards during the power stroke of the otto cycle in ic engine. Thermal Efficiency of IC Engine is denoted by η_th symbol.

How to calculate Thermal efficiency of IC engine using this online calculator? To use this online calculator for Thermal efficiency of IC engine, enter Work Done per Cycle in IC Engine (W) & Heat Added by Combustion per Cycle (Q_in) and hit the calculate button. Here is how the Thermal efficiency of IC engine calculation can be explained with given input values -> 0.002533 = 100000/150000.

FAQ

What is Thermal efficiency of IC engine?

The Thermal efficiency of IC engine formula is defined as the ratio of the work done to push the piston downwards during the power stroke of the otto cycle in ic engine and is represented as η_th = W/Q_in or Thermal Efficiency of IC Engine = Work Done per Cycle in IC Engine/Heat Added by Combustion per Cycle. Work Done per Cycle in IC Engine is defined as work done to push the piston downwards during the power stroke of the otto cycle in IC engine & Heat added by combustion per cycle is defined as the amount of heat energy liberated from the combustion of the fuel in one working cycle.

How to calculate Thermal efficiency of IC engine?

The Thermal efficiency of IC engine formula is defined as the ratio of the work done to push the piston downwards during the power stroke of the otto cycle in ic engine is calculated using Thermal Efficiency of IC Engine = Work Done per Cycle in IC Engine/Heat Added by Combustion per Cycle. To calculate Thermal efficiency of IC engine, you need Work Done per Cycle in IC Engine (W) & Heat Added by Combustion per Cycle (Q_in). With our tool, you need to enter the respective value for Work Done per Cycle in IC Engine & Heat Added by Combustion per Cycle 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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