arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.02505cond-mat.stat-mech
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平衡态Maxwell制冷机的效率估算

Efficiency estimation for an equilibrium version of Maxwell refrigerator

Toby Joseph, Kiran V

摘要:

Maxwell制冷机是由Mandal等人在\cite{Mandal2013a}中提出的一种利用信息库将冷热源的热量传递到热热源的装置。该模型有一个两个状态的恶魔和一个位流同时与两个热库相互作用。我们设计了一个更简单的冰箱版本,其中恶魔和比特系统分别与水库相互作用,并持续足够长的时间以建立平衡。计算了该装置作为发动机工作时的效率$η$以及作为制冷机工作时的性能系数(COP)。它示出的最大效率相匹配的卡诺发动机/制冷机之间的工作温度相同,如预期的。当$T_h >T_c \gg ΔE$($k_B = 1$)时,最大功率下的COP随着$\frac{1}{T_h}$减小,其中$T_h$和$T_c$分别是热储液器和冷储液器的温度,$ΔE$是恶魔的电平间距。当作为热力发动机工作时,在装置的最大功率下的$η$被发现是$\frac{T_h}{0.779 + T_h}$,当$T_c \ll ΔE$和$T_h \gg ΔE$。

英文摘要:

Maxwell refrigerator as a device that can transfer heat from a cold to hot temperature reservoir making use of information reservoir was introduced by Mandal et al. \cite{Mandal2013a}. The model has a two state demon and a bit stream interacting with two thermal reservoirs simultaneously. We work out a simpler version of the refrigerator where the demon and bit system interact with the reservoirs separately and for a duration long enough to establish equilibrium. The efficiency, $η$, of the device when working as an engine as well as the coefficient of performance (COP) when working as a refrigerator are calculated. It is shown that the maximum efficiency matches that of a Carnot engine/refrigerator working between the same temperatures, as expected. The COP at maximum power decreases as $\frac{1}{T_h}$ when $T_h >T_c \gg ΔE$ ($k_B = 1$), where $T_h$ and $T_c$ are the temperatures of the hot and cold reservoirs respectively and $ΔE$ is the level spacing of the demon. $η$ at maximum power of the device, when working as a heat engine, is found to be $\frac{T_h}{0.779 + T_h}$ when $T_c \ll ΔE$ and $T_h \gg ΔE$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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