Results 91 to 100 of about 41,197 (198)
Case Studies in Thermal EngineeringAmong the different electrical energy storage technologies, the Carnot batteries are promising options with low specific cost that do not suffer from geographical limitations and power-capacity coupling.
Badreddine Ayadi +5 more
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Identifying student difficulties with entropy, heat engines, and the Carnot cycle
Physical Review Special Topics. Physics Education Research, 2015 [This paper is part of the Focused Collection on Upper Division Physics Courses.] We report on several specific student difficulties regarding the second law of thermodynamics in the context of heat engines within upper-division undergraduate thermal ...
Trevor I. Smith +3 more
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Research on medium–low temperature geothermal power generation system
Energy Reports, 2022 In order to make full use of the medium and low temperature geothermal resources and industrial waste heat resources, a power cycle system using ammonia–water mixed solution as the working fluid is proposed.
Bing Hu, Jiajun Guo
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Carnot's Cycle and Efficiency of Heat Engines [PDF]
Nature, 1925 ON p. 326 of NATURE for August 29 appears an abstract of a paper by Dr. J. S. Haldane, which he read before the Institution of Mining Engineers on June 16. In this paper he has “thrown to the winds” the usual academic teaching in regard to the efficiency of a Carnot cycle, and has put forward a claim that another cycle has a greater efficiency.
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Transformation of heat into mechanical energy by means of rotating systems
MATEC Web of Conferences, 2018 All heat engines need two different temperatures for their work ...
Mešina Marian
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Performance at maximum figure of merit for a Brownian Carnot refrigerator [PDF]
arXivThis paper focuses on the coefficient of performance (COP) at maximum figure of merit $\chi$ for a Brownian Carnot-like refrigerator, within the context of symmetric Low-Dissipation approach. Our proposal is based on the Langevin equation for a Brownian particle bounded to a harmonic potential trap, which can perform Carnot-like cycles at finite time ...
arxiv
Maximum power of a two-dimensional quantum mechanical engine with spherical symmetry [PDF]
arXiv, 2019 We study two-dimensional quantum Carnot engines of spherical symmetry by considering the case of a particle on the surface of a sphere of changing radius. The Carnot cycle is built allowing the state of the system to change with the specific constrains discussed in Bender's work for Carnot cycles. After studying the Carnot cycle, we maximize the output
arxiv
A reassessment of the Carnot cycle and the concept of entropy
Nature Precedings, 2008 AbstractIt is argued that the Carnot cycle is a highly inaccurate representation of a steam engine, and that the net work obtained in its operation would be zero. This conclusion is also supported by an elementary mathematical approach, which re-examines the work done in the four individual steps of the cycle.
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Entropy-based analysis of single-qubit Otto and Carnot heat engines [PDF]
arXivFrom an entropy-based formulation of the first law of thermodynamics in the quantum regime, we investigate the performance of Otto-like and Carnot-like engines for a single-qubit working medium. Within this framework, the first law includes an additional contribution -- coherence work -- that quantifies the energetic cost of deviating the quantum ...
arxiv
Results in PhysicsMass transfer processes, cycles and associated conversion devices find wide application in air-conditioning. However, several optimization problems concerning mass-related devices and systems persist due to the absence of corresponding optimization ...
Yin Zhang +3 more
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