Optimisation of a class of heat engines with explicit solution
Sign Up to like & getrecommendations! Published in 2019 at "Physica A: Statistical Mechanics and its Applications"
DOI: 10.1016/j.physa.2019.121272
Abstract: Abstract A specific class of stochastic heat engines driven cyclically by time-dependent potential, which is defined in the half-line ( 0 x + ∞ ), is analysed. For such engines, most of their physical quantities… read more here.
Keywords: heat engines; class heat; optimisation class; heat ... See more keywords
Learning the best nanoscale heat engines through evolving network topology
Sign Up to like & getrecommendations! Published in 2021 at "Communications Physics"
DOI: 10.1038/s42005-021-00553-z
Abstract: The quest to identify the best heat engine has been at the center of science and technology. Considerable studies have so far revealed the potentials of nanoscale thermal machines to yield an enhanced thermodynamic efficiency… read more here.
Keywords: heat engines; topology; nanoscale heat; heat ... See more keywords
Maximum-power heat engines and refrigerators in the fast-driving regime
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review A"
DOI: 10.1103/physreva.104.032226
Abstract: We study the optimization of thermodynamic performances in arbitrary periodically driven open quantum systems. Within the assumption of fast modulation of the driving parameters, we derive the optimal cycle that universally maximizes the extracted power… read more here.
Keywords: heat; power heat; power; maximum power ... See more keywords
Hierarchical Onsager symmetries in adiabatically driven linear irreversible heat engines.
Sign Up to like & getrecommendations! Published in 2021 at "Physical review. E"
DOI: 10.1103/physreve.103.l050101
Abstract: In existing linear response theories for adiabatically driven cyclic heat engines, Onsager symmetry is identified only phenomenologically, and a relation between global and local Onsager coefficients, defined over one cycle and at any instant of… read more here.
Keywords: onsager coefficients; heat; driven linear; heat engines ... See more keywords
Cyclic heat engines with nonisentropic adiabats and generalization to steady-state devices including thermoelectric converters.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review. E"
DOI: 10.1103/physreve.105.064136
Abstract: For heat engines (including refrigerators) the separation of total entropy production in reversible parts ΔS and irreversible contributions has proved to be very useful. The ΔS are entropies for ideal lossless processes at the hot-… read more here.
Keywords: thermoelectric converters; heat engines; entropy; heat ... See more keywords
Non-Markovian thermal operations boosting the performance of quantum heat engines.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review. E"
DOI: 10.1103/physreve.106.014114
Abstract: It is investigated whether non-Markovianity, i.e., the memory effects resulting from the coupling of the system to its environment, can be beneficial for the performance of quantum heat engines. Specifically, two physical models are considered.… read more here.
Keywords: heat engines; non markovian; thermal operations; engine ... See more keywords
Optimizing Brownian heat engine with shortcut strategy.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review. E"
DOI: 10.1103/physreve.106.054108
Abstract: Shortcuts to isothermality provide a powerful method to speed up quasistatic thermodynamic processes within finite-time manipulation. We employ the shortcut strategy to design and optimize Brownian heat engines, and we formulate a geometric description of… read more here.
Keywords: shortcut strategy; shortcut; heat engines; brownian heat ... See more keywords
Optimal linear cyclic quantum heat engines cannot benefit from strong coupling.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review. E"
DOI: 10.1103/physreve.106.l022105
Abstract: Uncovering whether strong system-bath coupling can be an advantageous operation resource for energy conversion can facilitate the development of efficient quantum heat engines (QHEs). Yet, a consensus on this ongoing debate is still lacking owing… read more here.
Keywords: heat engines; coupling; strong coupling; linear cyclic ... See more keywords
Finite-size effect on optimal efficiency of heat engines.
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review E"
DOI: 10.1103/physreve.96.012128
Abstract: The optimal efficiency of quantum (or classical) heat engines whose heat baths are n-particle systems is given by the strong large deviation. We give the optimal work extraction process as a concrete energy-preserving unitary time… read more here.
Keywords: finite size; heat engines; heat baths; optimal efficiency ... See more keywords
Heat engines at optimal power: Low-dissipation versus endoreversible model.
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review E"
DOI: 10.1103/physreve.96.012151
Abstract: The low-dissipation model and the endoreversible model of heat engines are two of the most commonly studied models of machines in finite-time thermodynamics. In this paper we compare the performance characteristics of these two models… read more here.
Keywords: heat engines; endoreversible model; model; optimal power ... See more keywords
Efficiency versus speed in quantum heat engines: Rigorous constraint from Lieb-Robinson bound.
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review E"
DOI: 10.1103/physreve.96.022138
Abstract: A long-standing open problem whether a heat engine with finite power achieves the Carnot efficiency is investgated. We rigorously prove a general trade-off inequality on thermodynamic efficiency and time interval of a cyclic process with… read more here.
Keywords: heat engines; lieb robinson; heat; efficiency ... See more keywords