Upper bound efficiencies for work generation from the energy of confined systems of quantum particles

Article Chemistry, Physical

Numerically exact simulations of a quantum Carnot cycle: Analysis using thermodynamic work diagrams

Shoki Koyanagi et al.

Summary: Efficiency of a quantum Carnot engine based on open quantum dynamics theory was investigated, with numerical simulations and analysis showing that maximum efficiency is solely determined by bath temperatures.

JOURNAL OF CHEMICAL PHYSICS (2022)

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Article Physics, Multidisciplinary

Statistical thermodynamics approach for the available work transported by particle fluxes

Viorel Badescu

Summary: This paper introduces an indicator called the work content factor to quantify the proportion of available work in a given amount of energy. The work content factor is calculated for low-speed and ultra-relativistic particle fluxes using several assumptions. The study shows that thermal photon emission is much lower than stimulated particle emission by the primary work extractor. Additionally, in some cases, work cannot be extracted from the energy of the particle flux when the average directional factor of the source of particles is small and the temperature is high.

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS (2022)

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Article Chemistry, Physical

Numerically exact simulations of a quantum Carnot cycle: Analysis using thermodynamic work diagrams

Shoki Koyanagi et al.

Summary: This study investigates the efficiency of a quantum Carnot engine based on open quantum dynamics theory. By numerical simulations and thermodynamic analysis, it is found that the maximum efficiency is determined solely by the bath temperatures, in line with Carnot's theorem.

JOURNAL OF CHEMICAL PHYSICS (2022)

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Article Physics, Fluids & Plasmas