Efficient asymmetric collisional Brownian particle engines

Noa, C. E. Fernández; Stable, Angel L. L.; Oropesa, William Gabriel Carreras; Rosas, Alexandre; Fiore, Carlos E.

doi:10.1103/physrevresearch.3.043152

Cited by 11 publications

(13 citation statements)

References 41 publications

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“…τ = τ 2 ). The fact that the symmetric case can give rise to inefficient engines was also observed in the model considered in [35]. It should thus be beneficial to identify the parameter range that is conducive to its performance.…”

Section: J Stat Mech (2023) 083203mentioning

confidence: 81%

“…In some recent works [34], the authors focus on the dependence of efficiency and power on the driving forces acting on engines that are sequentially connected to different thermal reservoirs, for both constant and linear drives. In an extension to this work [35], the authors introduce an asymmetry between the contact times with the different heat baths and in the magnitude of the driving forces, as possible parameters that can be used to optimize the performance. Such a study is useful in the investigation of collisional engines [34,36], where the working system interacts with only one portion of its environment at a time.…”

Section: J Stat Mech (2023) 083203mentioning

confidence: 99%

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Exploring outputs from concatenated stochastic heat engines

Kumari¹,

Marathe²,

Lahiri³

2023

J. Stat. Mech.

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Recent work on the concatenation of two simple heat engines has shown that it may lead to non-monotonic variations in the efficiency and power with parameters like driving amplitudes and asymmetries in cycle periods. Motivated by this study, we investigate the effect of the concatenation between two stochastic heat engines where colloidal particles have been trapped in harmonic potentials. The stiffness parameters of each engine are varied cyclically, but with different cycle periods, with a common thermal bath that acts as a sink for the first engine but as a source for the second. We consider two types of protocol, the first where the trap strength undergoes sudden jumps, and the second where it varies linearly with time. In both we find several non-trivial effects, like the non-monotonic functional dependence of the engine outputs on several parameters used in the setup. For the protocol that varies linearly with time, the concatenation leads to enhanced output power as compared to a single effective engine, in a suitable range of parameters. It has been shown that the output from the combined system shows a peak with respect to the asymmetry in the cycle times of the engines that have been concatenated. A general relation for the efficiency of an arbitrary number of concatenated engines driven quasistatically has been provided.

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Section: J Stat Mech (2023) 083203mentioning

confidence: 81%

Section: J Stat Mech (2023) 083203mentioning

confidence: 99%

Exploring outputs from concatenated stochastic heat engines

Kumari¹,

Marathe²,

Lahiri³

2023

J. Stat. Mech.

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show abstract

“…A second aspect to be investigated in this section relies on the inclusion of a distinct duration of each stage, measured by the asymmetry κ = τ 1 /τ 2 . This ingredient has been revealed to be a powerful ingredient for improving the system's power in the interactionless case [107] or even both P and η in the case of collisional Brownian engines [108] and is depicted in the right panels of Fig. 4.4.…”

Section: Influence Of Period τ and Asymmetric Switchingsmentioning

confidence: 99%

Termodinâmica e eficiência de sistemas coletivos

Costa

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Stochastic thermodynamics has become one of the main cornerstones of modern statistical mechanics and special attention has been given to systems presenting collective behavior. In this master project, we have investigated distinct aspects in two classes of systems exhibiting collective behavior. The former is an opinion system displaying a variety of phase transitions depending on the model details (topology, inertia, and neighborhood). We have investigated in detail its properties by formulating a consistent thermodynamics approach by relating heat with dissipation. The latter system studied here is a minimal prototype of a nonequilibrium engine model displaying collective behavior, composed of two interacting nanomachines. We investigated its thermodynamic properties, such as efficiency, power, engine design, and distinct routes for improving its performance. Results show that a suitable choice of parameters and design can result in a remarkable improvement, including maximum efficiencies approaching ideal values and efficiencies at maximum power greater than known bounds in the literature.

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“…Sequential (or collisional) engines have been put forward as an alternative candidate for the realisation of reliable thermal engines [92,93] and novel engine setups [75,82,94,95]. They consist of sequentially placing the system/engine in contact with distinct thermal reservoirs and subjected to external driving forces during each stage (stroke) of the cycle.…”

Section: Introductionmentioning

confidence: 99%

“…Despite its reliability in ... ... distinct situations [34,76,77,78], the conditions to be imposed in order to provide a better performance have not been fully understood and for this reason distinct (and recent) approaches for enhancing its performance have been proposed and analyzed. Among them, we cite the convenient choices of the duration of each stroke [82,94] and driving [86,95].…”

Section: Introductionmentioning

confidence: 99%

Stochastic thermodynamics of collisional thermal machines and phase transition

Noa

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Efficient asymmetric collisional Brownian particle engines

Cited by 11 publications

References 41 publications

Exploring outputs from concatenated stochastic heat engines

Exploring outputs from concatenated stochastic heat engines

Termodinâmica e eficiência de sistemas coletivos

Stochastic thermodynamics of collisional thermal machines and phase transition

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