UTILIZAREA SISTEMELOR TERMODINAMICE CUPLATE SI A PROCESELOR TERMODINAMICE IREVERSIBILE, LA CRESTEREA RANDAMENTULUI MASINILOR TERMICE

Autor/autori: Eugen Banches si Octavian Banches

Abstract: Authors show theoretical basses of a new thermodynamic process to maximize heat engine efficiency, that uses theoretical Carnot cycles or other real cycles like Otto, Diesel or Atkinson, and realize the possibility to separate that, as independent thermodynamic cycle. New thermodynamic cycle encompasses the physical interaction of two entropic divided systems, of which one is a variable mass system and other is a conventional constant mass system. The coupled thermodynamic system accomplish several nonequilibrium thermodynamic stages of an irreversible proces, that allow both to increase the total entropy of the coupled system and variable mass system and both decrease the total entropy of a constant mass system. The biological processes similarity of negentropy production like metabolism or breathing, and the new fundamental theory process application areas in transporting and power generation (classical and nuclear), are claimed. The Study starts at James Atkinson idea that he initiated in 1882 about reciprocately pistons heat engine efficiency improvement of an constant mass working fluide in reversible thermodynamic cycle by cinematical design modification of the two suscesive strokes, that the compression stroke is less longer than the expansion stroke. Results of last theoretical available studies about cycle performances are showed. This work extends the study about real internal combustion engines, that exiges exhaust-intake ‘pumping cycles’ use, in order to restore the oxygen concentration prior cycle resuming, and notify the revese of ‘pumping cycle’ stages after constant mass system pressure decrease below atmospheric pressure, concurrent with a composed variable mass system genesis, which specifical entropy reach asymptotic after environmental specifical entropy. This paper emphasize possible positive work increase and negative work decrease in total cycle power balance, in all actual heat engines types, if irreversible thermodynamics cycles and coupled thermodynamic systems are used.

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