Efficiency at maximum power: An analytically solvable model for stochastic heat engines

Details Efficiency at maximum power: An analytically solvable model for stochastic heat engines Efficiency at maximum power: An analytically solvable model for stochastic heat engines

2007-10-22

arxiv.org/abs/0710.4097v1

EPL, 81 (2008) 20003

Physics

Condensed Matter

Statistical Mechanics

6 pages, 3 figures

Scientific paper

10.1209/0295-5075/81/20003

We study a class of cyclic Brownian heat engines in the framework of finite-time thermodynamics. For infinitely long cycle times, the engine works at the Carnot efficiency limit producing, however, zero power. For the efficiency at maximum power, we find a universal expression, different from the endoreversible Curzon-Ahlborn efficiency. Our results are illustrated with a simple one-dimensional engine working in and with a time-dependent harmonic potential.

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