in this study, the performance of an irreversible regenerative brayton cycle is sought through power maximizations using finite-time thermodynamic concept in finite-size components. optimizations are performed using a genetic algorithm. in order to take into account the finite-time and finite-size concepts in the current problem, a dimensionless mass-flow rate parameter is used to deploy time v...

Abstract In Newtonian mechanics, time and space are perceived as absolute entities. Einstein’s relativity theory, is frame dependent. Time also affected by gravitational field the varies in space, throughout space. present article, thermodynamic-based investigated. macroscopic view of thermodynamics, energy conserved every system or process. On other hand, exergy (availability) not can be destr...

The study of time has a long history and is still ongoing. term formulated by Isaac Newton was coined in the 17th century, so naturally it could not relate to thermodynamics. Since passage aging are inalienable components human experience, Newton's concept alive. W.G. Leibniz I. Kant mainly questioned absoluteness time. This paper introduces definition justifies thesis that thermodynamic proces...

The possibility of simultaneous opposite running thermodynamic arrows of time has been raised on several occasions, for didactic purposes [1], for general interest [2], and to confound by “obvious” counterexample [2]. A difficulty in these considerations is the absence of a welldefined framework. For example, one might argue against opposing arrows as follows. Let the systems be A and B. An obs...

Recent years have seen a tremendous progress in the microscopic theoretical treatment of surfaces and processes on surfaces. While some decades ago a phenomenological thermodynamic approach was dominant, a variety of surface properties can now be described from first principles, i.e. without invoking any empirical parameters. Consequently, the field of theoretical surface science is no longer l...