Efficiency at maximum power: An analytically solvable model for stochastic heat engines
Efficiency at maximum power: An analytically solvable model for stochastic heat engines
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DOI：
10.1209/0295-5075/81/20003
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发表时间：
2008-01-01
期刊：
影响因子：
1.8
通讯作者：
Seifert, U.
中科院分区：
文献类型：
--
作者：
Schmiedl, T.;Seifert, U.
我们在有限时间热力学框架内研究一类循环布朗热机。对于无限长的循环时间，发动机在卡诺效率极限下工作，但产生的功率为零。对于最大功率下的效率，我们找到了一个通用表达式，与内可逆柯松-阿尔伯恩效率不同。我们的结果通过一个简单的一维引擎来说明，该引擎在与时间相关的谐波势中工作。版权所有 (C) EPLA，2008
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. Copyright (C) EPLA, 2008