Otto Cycle Heat Rejected Calculator

Heat added during combustion process (Q_in):

Mass of the working fluid (m):

Specific heat at constant volume (C_v):

Temperature at the end of the expansion stroke (T₄):

Temperature before compression (T₁):

How This Is Calculated

$$ Q_{in} = m C_v (T_4 - T_1) $$ where:

Q_in = Heat rejected during combustion process (J)

m = Mass of the working fluid (air-fuel mixture) (kg)

C_v = Specific heat at constant volume (J/kg K)

T₄ = Temperature at the end of the expansion stroke (K)

T₁ = Temperature before compression (K)

Assumptions

The working fluid behaves as an ideal gas.
Specific heats remain constant.
Compression and expansion processes are adiabatic.
There is perfect mixing of the air and fuel.

Related Calculators

Otto Cycle Compression Ratio

Otto Cycle Efficiency

Otto Cycle Heat Added (Combustion Process)

Otto Cycle Pressure

Otto Cycle Temperature