Molecular kinetic analysis of a finite-time Carnot cycleY. Izumida and K. Okuda
Division of Physics, Hokkaido University - Sapporo 060-0810, Japan
received 25 February 2008; accepted in final form 25 July 2008; published September 2008
published online 8 September 2008
We study the efficiency at the maximal power of a finite-time Carnot cycle of a weakly interacting gas which we can regard as a nearly ideal gas. In several systems interacting with the hot and cold reservoirs of the temperatures and , respectively, it is known that , which is often called the Curzon-Ahlborn (CA) efficiency . For the first time numerical experiments to verify the validity of are performed by means of molecular dynamics simulations and reveal that our does not always agree with , but approaches in the limit of . Our molecular kinetic analysis explains the above facts theoretically by using only elementary arithmetic.
05.70.Ln - Nonequilibrium and irreversible thermodynamics.
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