Optimal path of piston motion of irreversible Otto cycle for minimum entropy generation with radiative heat transfer law

Progress in Finite Time Thermodynamic Studies for Internal Combustion Engine Cycles

“…Using the heat engine models established in [257,258,272,276], Ge [84] obtained the OPM trajectories of an Otto cycle for MEG which was generated by FL, HTL and pressure drop loss, as well as for MEF, respectively, when the HTA obeys generalized radiative HTA, and the results obtained included the OPM trajectories for MEG [272,289] and MEF with linear phenomenological HTA [272] and radiative HTA [289]. The OPM trajectories on power strokes of an irreversible Otto cycle for MEG and MEF when HTA obeys generalized radiative HTA are determined by following differential equations [84]:…”

“…According to [84,257,258,272,276,289], the conventional piston motion of irreversible Otto cycle is determined by:…”

“…OPM trajectories on power strokes of irreversible Otto cycle heat engines for different OPBs with different HTAs are shown in Figure 14 [84]. The results obtained in Figure 14 included the OPM trajectories for MW with Newton's and phenomenological HTAs, and the OPM for MEG [272,289] and MEF with Newton's HTA [272], linear phenomenological HTA [272] and radiative HTA [289]. …”

“…OPM trajectories on power strokes of irreversible Otto cycle heat engines for different OPBs with different HTAs are shown in Figure 14 [84]. The results obtained in Figure 14 included the OPM trajectories for MW with Newton's and phenomenological HTAs, and the OPM for MEG [272,289] and MEF with Newton's HTA [272], linear phenomenological HTA [272] and radiative HTA [289]. Considering the finite combustion rate model in [259], Ge [84] studied the OPM trajectories of an irreversible Diesel cycle engine for MEG and MEF when HTA obeys the generalized radiative HTA, and examined the influences of HTA and OPB on the OPM trajectories.…”

Entransy variation associated with work

“…The entropy generation minimization has been widely used to analyze heat transfer processes and thermodynamic cycles [3][4][5][6]. However, there are different viewpoints for the applicability of this theory to the analyses of thermal systems.…”