TY - JOUR
TI - Finite time thermodynamic modeling and analysis for an irreversible Atkinson cycle
AU - Ge Yanlin
AU - Chen Lingen
AU - Sun Fengrui
JN - Thermal Science
PY - 2010
VL - 14
IS - 4
SP - 887
EP - 896
PT - Article
AB - Performance of an air-standard Atkinson cycle is analyzed by using  finite-time thermodynamics. The irreversible cycle model which is more close  to practice is founded. In this model, the nonlinear relation between the  specific heats of working fluid and its temperature, the friction loss  computed according to the mean velocity of the piston, the internal  irreversibility described by using the compression and expansion  efficiencies, and heat transfer loss are considered. The relations between  the power output and the compression ratio, between the thermal efficiency  and the compression ratio, as well as the optimal relation between power  output and the efficiency of the cycle are derived by detailed numerical  examples. Moreover, the effects of internal irreversibility, heat transfer  loss and friction loss on the cycle performance are analyzed. The results  obtained in this paper may provide guidelines for the design of practical  internal combustion engines.