LCM calculator

Thermal Efficiency of Otto Cycle Calculator

Physics Chemistry Engineering Financial More >>

↳

Mechanical Aerospace Basic Physics Others and Extra

⤿

IC Engine Automobile Design of Automobile Elements Design of Machine Elements More >>

⤿

Air Standard Cycles Design of IC Engine Components Engine Performance Parameters Fuel Injection in IC Engine

✖Compression ratio refers to how much the air-fuel mixture is squeezed in the cylinder before ignition. It's essentially the ratio between the volume of the cylinder at BDC to TDC.ⓘ Compression Ratio [r]			+10% -10%
✖The Heat Capacity Ratio or, adiabatic index quantifies the relationship between heat added at constant pressure and the resulting temperature increase compared to heat added at constant volume.ⓘ Heat Capacity Ratio [γ]			+10% -10%

✖The Thermal Efficiency of Otto Cycle represents the effectiveness of petrol engine. It is measured by comparing how much work is done through out the system to the heat supplied to the system.ⓘ Thermal Efficiency of Otto Cycle [ε_o]

⎘ Copy

👎

Formula

LaTeX

Reset

👍

Download Air Standard Cycles Formulas PDF PDF Image

Thermal Efficiency of Otto Cycle Solution

STEP 0: Pre-Calculation Summary

Formula Used

Thermal Efficiency of Otto Cycle = 1-1/Compression Ratio^(Heat Capacity Ratio-1)
ε_o = 1-1/r^(γ-1)
This formula uses 3 Variables

Variables Used

Thermal Efficiency of Otto Cycle - The Thermal Efficiency of Otto Cycle represents the effectiveness of petrol engine. It is measured by comparing how much work is done through out the system to the heat supplied to the system.
Compression Ratio - Compression ratio refers to how much the air-fuel mixture is squeezed in the cylinder before ignition. It's essentially the ratio between the volume of the cylinder at BDC to TDC.
Heat Capacity Ratio - The Heat Capacity Ratio or, adiabatic index quantifies the relationship between heat added at constant pressure and the resulting temperature increase compared to heat added at constant volume.

STEP 1: Convert Input(s) to Base Unit

Compression Ratio: 20 --> No Conversion Required
Heat Capacity Ratio: 1.4 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

ε_o = 1-1/r^(γ-1) --> 1-1/20^(1.4-1)

Evaluating ... ...

ε_o = 0.698291183172742

STEP 3: Convert Result to Output's Unit

0.698291183172742 --> No Conversion Required

FINAL ANSWER

0.698291183172742 ≈ 0.698291 <-- Thermal Efficiency of Otto Cycle

(Calculation completed in 00.004 seconds)

You are here -

Home » Physics » IC Engine » Mechanical » Air Standard Cycles » Thermal Efficiency of Otto Cycle

Credits

Created by Peri Krishna Karthik

National Institute of Technology Calicut (NIT Calicut), Calicut, Kerala

Peri Krishna Karthik has created this Calculator and 200+ more calculators!

Verified by Aditya verma

maulana azad national institute of technology (NIT bhopal), Bhopal m.p india

Aditya verma has verified this Calculator and 4 more calculators!

< Air Standard Cycles Calculators

Mean Effective Pressure in Dual Cycle

LaTeX Go Mean Effective Pressure of Dual Cycle = Pressure at Start of Isentropic Compression*(Compression Ratio^Heat Capacity Ratio*((Pressure Ratio in Dual Cycle-1)+Heat Capacity Ratio*Pressure Ratio in Dual Cycle*(Cut-off Ratio-1))-Compression Ratio*(Pressure Ratio in Dual Cycle*Cut-off Ratio^Heat Capacity Ratio-1))/((Heat Capacity Ratio-1)*(Compression Ratio-1))

Mean Effective Pressure in Diesel Cycle

LaTeX Go Mean Effective Pressure of Diesel Cycle = Pressure at Start of Isentropic Compression*(Heat Capacity Ratio*Compression Ratio^Heat Capacity Ratio*(Cut-off Ratio-1)-Compression Ratio*(Cut-off Ratio^Heat Capacity Ratio-1))/((Heat Capacity Ratio-1)*(Compression Ratio-1))

Mean Effective Pressure in Otto Cycle

LaTeX Go Mean Effective Pressure of Otto Cycle = Pressure at Start of Isentropic Compression*Compression Ratio*(((Compression Ratio^(Heat Capacity Ratio-1)-1)*(Pressure Ratio-1))/((Compression Ratio-1)*(Heat Capacity Ratio-1)))

Work Output for Otto Cycle

LaTeX Go Work Output of Otto Cycle = Pressure at Start of Isentropic Compression*Volume at Start of Isentropic Compression*((Pressure Ratio-1)*(Compression Ratio^(Heat Capacity Ratio-1)-1))/(Heat Capacity Ratio-1)

Thermal Efficiency of Otto Cycle Formula

LaTeX Go

Thermal Efficiency of Otto Cycle = 1-1/Compression Ratio^(Heat Capacity Ratio-1)
ε_o = 1-1/r^(γ-1)

What are the theoretical processes involved in the otto cycle?

Isentropic Compression(1-2): Air-fuel mixture is compressed in the cylinder without heat transfer, raising pressure and temperature.
Constant Volume Heat Addition(2-3): Spark ignition causes the air-fuel mixture to combust rapidly at a constant volume, significantly increasing temperature.
Isentropic Expansion(3-4): The hot, high-pressure gas expands in the cylinder, performing work on the piston.
Constant Pressure Heat Rejection(4-1): Heat is removed from the cylinder at a constant pressure, lowering temperature and pressure back to its starting point.

How to Calculate Thermal Efficiency of Otto Cycle?

Thermal Efficiency of Otto Cycle calculator uses Thermal Efficiency of Otto Cycle = 1-1/Compression Ratio^(Heat Capacity Ratio-1) to calculate the Thermal Efficiency of Otto Cycle, Thermal Efficiency of Otto Cycle measures how efficiently a petrol engine converts heat energy from fuel into mechanical work. It reflects the effectiveness of converting heat from burning fuel into usable work output at crankshaft. By maximizing this efficiency, petrol engines can achieve better performance and fuel economy. Thermal Efficiency of Otto Cycle is denoted by ε_o symbol.

How to calculate Thermal Efficiency of Otto Cycle using this online calculator? To use this online calculator for Thermal Efficiency of Otto Cycle, enter Compression Ratio (r) & Heat Capacity Ratio (γ) and hit the calculate button. Here is how the Thermal Efficiency of Otto Cycle calculation can be explained with given input values -> 0.698291 = 1-1/20^(1.4-1).

FAQ

What is Thermal Efficiency of Otto Cycle?

Thermal Efficiency of Otto Cycle measures how efficiently a petrol engine converts heat energy from fuel into mechanical work. It reflects the effectiveness of converting heat from burning fuel into usable work output at crankshaft. By maximizing this efficiency, petrol engines can achieve better performance and fuel economy and is represented as ε_o = 1-1/r^(γ-1) or Thermal Efficiency of Otto Cycle = 1-1/Compression Ratio^(Heat Capacity Ratio-1). Compression ratio refers to how much the air-fuel mixture is squeezed in the cylinder before ignition. It's essentially the ratio between the volume of the cylinder at BDC to TDC & The Heat Capacity Ratio or, adiabatic index quantifies the relationship between heat added at constant pressure and the resulting temperature increase compared to heat added at constant volume.

How to calculate Thermal Efficiency of Otto Cycle?

Thermal Efficiency of Otto Cycle measures how efficiently a petrol engine converts heat energy from fuel into mechanical work. It reflects the effectiveness of converting heat from burning fuel into usable work output at crankshaft. By maximizing this efficiency, petrol engines can achieve better performance and fuel economy is calculated using Thermal Efficiency of Otto Cycle = 1-1/Compression Ratio^(Heat Capacity Ratio-1). To calculate Thermal Efficiency of Otto Cycle, you need Compression Ratio (r) & Heat Capacity Ratio (γ). With our tool, you need to enter the respective value for Compression Ratio & Heat Capacity Ratio and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

Home

FREE PDFs

🔍 Search