title: Efficiency at maximum power output of an irreversible Carnot-like cycle with internally dissipative friction.
abstract: We investigate the efficiency at the maximum power output (EMP) of an irreversible Carnot engine performing finite-time cycles between two reservoirs at constant temperatures T(h) and T(c) (<T(h)), taking into account the internally dissipative friction in two "adiabatic" processes. The EMP is retrieved to be situated between η(C)/2 and η(C)/(2-η(C)), with η(C) = 1-T(c)/T(h) being the Carnot efficiency, whether the internally dissipative friction is considered or not. When dissipations of two "isothermal" and two "adiabatic" processes are symmetric, respectively, and the time allocation between the adiabats and the contact time with the reservoir satisfy a certain relation, the Curzon-Ahlborn (CA) efficiency η(CA) = 1-sqrt[T(c)/T(h)] is derived.
authors.affiliation: Department of Physics, Nanchang University, Nanchang 330031, China. physwjh@gmail.com
authors.forename: Jianhui
authors.initials: J
authors.lastname: Wang
authors.forename: Jizhou
authors.initials: J
authors.lastname: He
mesh_terms: D003198:Computer Simulation; D004735:Energy Transfer; D017276:Friction; D008962:Models, Theoretical; D013816:Thermodynamics