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摘要翻译：
本文讨论了细分棘轮势对微小布朗热机性能的影响，该热机被模拟为一个布朗粒子在锯齿势中跳跃（有负载或无负载），沿其路径交替放置冷热浴。结果表明，当锯齿势细分为更小的连通势垒级数时，制冷机的速度、效率和性能系数达到最大值。当发动机准静态运行时，由于动能热流的不可逆性，发动机的效率不能接近卡诺效率，制冷机的性能系数总是小于卡诺制冷机。
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英文标题：
《Modeling an efficient Brownian heat engine》
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作者：
Mesfin Asfaw
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最新提交年份：
2008
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分类信息：
一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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一级分类：Physics 物理学
二级分类：Other Condensed Matter 其他凝聚态物质
分类描述：Work in condensed matter that does not fit into the other cond-mat classifications
在不适合其他cond-mat分类的凝聚态物质中工作
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英文摘要：
We discuss the effect of subdividing the ratchet potential on the performance of a tiny Brownian heat engine that is modeled as a Brownian particle hopping in a viscous medium in a sawtooth potential (with or without load) assisted by alternately placed hot and cold heat baths along its path. We show that the velocity, the efficiency and the coefficient of performance of the refrigerator maximize when the sawtooth potential is subdivided into series of smaller connected barrier series. When the engine operates quasistatically, we analytically show that the efficiency of the engine can not approach the Carnot efficiency and, the coefficient of performance of the refrigerator is always less than the Carnot refrigerator due to the irreversible heat flow via the kinetic energy.
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PDF链接：
https://arxiv.org/pdf/801.4599
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