Power and efficiency optimizations of Maisotsenko-Atkinson,Dual and Miller cycles and performance comparisons with corresponding traditional cycles

Maisotsenko cycle(M-cycle)has been combined with some cooling and power cycles,and behaves important thermodynamic advantage.Finite-time thermodynamics(FTT)is applied to establish three endoreversible models of M-Atkinson,M-Dual and M-Miller cycles.They are performed based on models of endoreversible Atkinson,Dual and Miller cycles by combing FTT model with M-cycle concept.Power output(POW)and thermal efficiency(TEF)of those M-cycles are studied and optimized by numerical calculations.The maximum power output(MPO)and the corresponding pressure ratio and TEF,the maximum TEF and the corresponding pressure ratio and POW,as well as optimal ranges of pressure ratio are obtained.Effects of mass flow rate of circulating water injection,initial cycle temperature and maximum cycle temperature on cycle POW,TEF and optimal pressure ratio range are analyzed.The optimal performances of the three M-cycles are compared with those of traditional Atkinson,Dual and Miller cycles under the same conditions.The results show that for the three M-cycles,end temperature of adiabatic expansion process of M-cycle is less than that of the corresponding traditional cycle,POW and TEF at arbitrary pressure ratio of M-cycle are much higher than those of the corresponding traditional cycle,and performance characteristics of M-cycles are superior to those of the corresponding traditional cycles.