Diesel Cycle Heat Calculator

Heat Added (Q_in):

Heat Rejected (Q_out):

Mass of the working fluid (m):

Specific Heat at Constant Pressure (C_p):

Specific Heat at Constant Volume (C_v):

Temperature at state 1 (T₁):

Temperature at state 2 (T₂):

Temperature at state 3 (T₃):

Temperature at state 4 (T₄):

How This Is Calculated

Heat Added (Q_in): $$ Q_{in} = m C_p (T_3 - T_2) $$
Heat Rejected (Q_out): $$ Q_{out} = m C_v (T_4 - T_1) $$
where:

Q_in = Heat Added (2-3) (J)

Q_out = Heat Rejected (4-1) (J)

m = Mass of the working fluid (kg)

C_p = Specific Heat at Constant Pressure (J/kg K)

C_v = Specific Heat at Constant Volume (J/kg K)

T₁ = Temperature at state 1 (K)

T₂ = Temperature at state 2 (K)

T₃ = Temperature at state 3 (K)

T₄ = Temperature at state 4 (K)

Assumptions

The working fluid behaves as an ideal gas.
Compression and expansion stages are adiabatic.
There are no heat losses to surroundings.
Specific heats remain constant.

Related Calculators

Diesel Cycle Cutoff Ratio

Diesel Cycle Efficiency

Diesel Cycle Work