Results 51 to 60 of about 3,219,487 (379)
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
Open Engineering, 2021 The aim of the paper is to analyze and evaluate the basic parameters of the combustion process in a modern Fiat 1.3 Multijet diesel engine, fuelled esters (FAME) and diesel oil.
Kurczyński Dariusz +2 more
doaj +1 more source
Energies, 2021 The fuel efficiency of marine diesel engine as any combustion engine falls with raising the temperature of air at the suction of its turbocharger. Therefore, cooling the engine turbocharger intake air by recovering exhaust gas heat to refrigeration ...
Victoria Kornienko +5 more
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Spin Heat Engine Coupled to a Harmonic-Oscillator Flywheel. [PDF]
Physical Review Letters, 2018 We realize a heat engine using a single-electron spin as a working medium. The spin pertains to the valence electron of a trapped ^{40}Ca^{+} ion, and heat reservoirs are emulated by controlling the spin polarization via optical pumping.
D. Lindenfels +6 more
semanticscholar +1 more source
Energies, 2012 This paper investigates the optimization of the performance of a solar powered Stirling engine based on finite-time thermodynamics. Heat transference in the heat exchangers between a concentrating solar collector and the Stirling engine is studied.
Chia-En Ho, Chieh-Li Chen, Her-Terng Yau
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Coherence effects in the performance of the quantum Otto heat engine [PDF]
Physical Review A, 2018 The working substance fueling a quantum heat engine may contain prominent quantum properties such as coherence and nonclassical correlations. In particular, coherence has been somewhat related to quantum friction, whose origin has been mostly associated ...
Patrice A. Camati +2 more
semanticscholar +1 more source
Efficiency of a Quantum Otto Heat Engine Operating under a Reservoir at Effective Negative Temperatures. [PDF]
Physical Review Letters, 2018 We perform an experiment in which a quantum heat engine works under two reservoirs, one at a positive spin temperature and the other at an effective negative spin temperature, i.e., when the spin system presents population inversion.
R. J. de Assis +6 more
semanticscholar +1 more source
Performance of discrete heat engines and heat pumps in finite time [PDF]
, 2000 The performance in finite time of a discrete heat engine with internal friction is analyzed. The working fluid of the engine is composed of an ensemble of noninteracting two level systems.
A. Bejan +35 more
core +3 more sources
Application of Stirling Engine Type Alpha Powered by the Recovery Energy on Vessels
Polish Maritime Research, 2020 The Stirling engine is a device in which thermal energy is transformed into mechanical energy without any contact between the heat carrier and the working gas enclosed in the engine. The mentioned feature makes this type of engine very attractive for the
Kropiwnicki Jacek
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Heat Engine Drives Transport of an FeII4L4 Cage and Cargo
Advances in Materials, 2020 The directed motion of species against a chemical potential gradient is a fundamental feature of living systems, underpinning processes that range from transport through cell membranes to neurotransmission.
Bao-Nguyen T Nguyen +4 more
semanticscholar +1 more source