Results 41 to 50 of about 3,226,193 (375)
A many-body heat engine at criticality [PDF]
Quantum Science and Technology, 2020 We show that a quantum Otto cycle in which the medium, an interacting ultracold gas, is driven between a superfluid and an insulating phase can outperform similar single particle cycles. The presence of an energy gap between the two phases can be used to
Thomás Fogarty, T. Busch
semanticscholar +1 more source
Methodology For Calculating Automotive Oil Radiator
Сельскохозяйственные машины и технологии, 2022 The paper highlights the relevance of the problem of determining the amount of heat supplied by an internal combustion engine to a liquid cooling system when creating typical series of unified heat exchangers for tractor and combine engines (power units).
E. P. Parlyuk, A. V. Kurilenko
doaj +1 more source
Abstract models for heat engines [PDF]
Front. Phys. 16, 33202 (2021), 2020 We retrospect three abstract models for heat engines which include a classic abstract model in textbook of thermal physics, a primary abstract model for finite-time heat engines, and a refined abstract model for finite-time heat engines. The detailed models of heat engines in literature of finite-time thermodynamics may be mapped into the refined ...
arxiv +1 more source
Single Gyrotropic Particle as a Heat Engine [PDF]
, 2020 We demonstrate that the system composed of a gyrotropic particle out of thermal equilibrium with vacuum can be regarded as a heat engine. Such a particle, initially at rest, will experience a fluctuation-induced torque and start to rotate, producing ...
Yu Guo, S. Fan
semanticscholar +1 more source
Nature, 1892 IN trying Mr. Smith's experiment on the rotation of nickel (NATURE, January 28, p. 294), I find my disk has a more complex action.
openaire +6 more sources
Geometric characterization for cyclic heat engines far from equilibrium [PDF]
Phys. Rev. A 109, 042209 (2024), 2023 Considerable attention has been devoted to microscopic heat engines in both theoretical and experimental aspects. Notably, the fundamental limits pertaining to power and efficiency, as well as the tradeoff relations between these two quantities, have been intensively studied.
arxiv +1 more source
Experimental Characterization of a Spin Quantum Heat Engine. [PDF]
Physical Review Letters, 2018 Developments in the thermodynamics of small quantum systems envisage nonclassical thermal machines. In this scenario, energy fluctuations play a relevant role in the description of irreversibility.
J. P. S. Peterson +6 more
semanticscholar +1 more source
Quantum limit to nonequilibrium heat-engine performance imposed by strong system-reservoir coupling.
Physical Review E, 2020 We show that finite system-reservoir coupling imposes a distinct quantum limit on the performance of a nonequilibrium quantum heat engine. Even in the absence of quantum friction along the isentropic strokes, finite system-reservoir coupling induces ...
David Newman, F. Mintert, A. Nazir
semanticscholar +1 more source
Nature, 1892 MR. FREDERICK SMITH described in NATURE of January 28 (p. 294) a simple heating machine, which he constructed with a nickel disk, so that when heated before a magnet it began to revolve. A similar heating machine was shown by Prof. Dr. T. Stefan, Vice-President of the Imperial and Royal Academy in Vienna, in the course of a lecture to his students ...
openaire +5 more sources
Performance of Curzon-Ahlborn engine along with its engine speed and compression ratio
Journal of Thermal Science and Technology, 2019 We evaluated the ideal limits of performance (power and efficiency) of heat engines operated with external heat sources along with their engine speed and compression ratio, using the method of adjoint equations based on variational principle. It is known
Shinji KOJIMA
doaj +1 more source