Finite-time thermodynamic analysis of porous medium combustion engine

Working processes of the porous medium combustion engine,called "PM-engine",are briefly introduced and the ideal thermodynamic model of PM heat regeneration cycle is presented.Finite-time thermodynamic analysis is applied to evaluate the thermodynamic performance of the PM-engine.A relation between net work and efficiency is derived for the cycle taking into account the efficiency of heat transfer.The maximum net work output and the corresponding efficiency bound of the cycle are determined.Detailed numerical results are given,and effects of parameters relevant to engine combustion on the cycle are also discussed.The results obtained herein provide a significant guidance to the performance evaluation and improvement for practical PM-engines.