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Articoli di riviste sul tema "Carnot efficiency"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 6 febbraio 2022

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1

Lucia, Umberto. "Carnot efficiency: Why?" Physica A: Statistical Mechanics and its Applications 392, no. 17 (September 2013): 3513–17. http://dx.doi.org/10.1016/j.physa.2013.04.020.

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2

Polettini, Matteo, and Massimiliano Esposito. "Carnot efficiency at divergent power output." EPL (Europhysics Letters) 118, no. 4 (May 1, 2017): 40003. http://dx.doi.org/10.1209/0295-5075/118/40003.

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3

Jennings, R. C., S. Santabarbara, E. Belgio, and G. Zucchelli. "The Carnot efficiency and plant photosystems." Biophysics 59, no. 2 (March 2014): 230–35. http://dx.doi.org/10.1134/s0006350914020080.

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4

Su, Shanhe, Yanchao Zhang, Guozhen Su, and Jincan Chen. "The Carnot efficiency enabled by complete degeneracies." Physics Letters A 382, no. 32 (August 2018): 2108–12. http://dx.doi.org/10.1016/j.physleta.2018.05.042.

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5

Jacob, K. T. "Fuel Cell Efficiency Redefined: Carnot Limit Reassessed." ECS Proceedings Volumes 2005-07, no. 1 (January 2005): 629–39. http://dx.doi.org/10.1149/200507.0629pv.

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6

Chen, Lingen, Zewei Meng, Yanlin Ge, and Feng Wu. "Performance Analysis and Optimization for Irreversible Combined Carnot Heat Engine Working with Ideal Quantum Gases." Entropy 23, no. 5 (April 27, 2021): 536. http://dx.doi.org/10.3390/e23050536.

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An irreversible combined Carnot cycle model using ideal quantum gases as a working medium was studied by using finite-time thermodynamics. The combined cycle consisted of two Carnot sub-cycles in a cascade mode. Considering thermal resistance, internal irreversibility, and heat leakage losses, the power output and thermal efficiency of the irreversible combined Carnot cycle were derived by utilizing the quantum gas state equation. The temperature effect of the working medium on power output and thermal efficiency is analyzed by numerical method, the optimal relationship between power output an

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7

Haseli, Y. "Substance Independence of Efficiency of a Class of Heat Engines Undergoing Two Isothermal Processes." Journal of Thermodynamics 2011 (May 25, 2011): 1–5. http://dx.doi.org/10.1155/2011/647937.

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Three power producing cycles have been so far known that include two isothermal processes, namely, Carnot, Stirling, and Ericsson. It is well known that the efficiency of the Carnot cycle represented by is independent of its working fluid. Using fundamental relationships between thermodynamic properties including Maxwell's relationships, this paper shows in a closed form that the Ericsson and the Stirling cycles also possess the Carnot efficiency irrespective of the nature of the working gas.

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8

Ying Ng, Nelly Huei, Mischa Prebin Woods, and Stephanie Wehner. "Surpassing the Carnot efficiency by extracting imperfect work." New Journal of Physics 19, no. 11 (November 7, 2017): 113005. http://dx.doi.org/10.1088/1367-2630/aa8ced.

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9

Moreno, Daniel, and Marta C. Hatzell. "Efficiency of Carnot and Conventional Capacitive Deionization Cycles." Journal of Physical Chemistry C 122, no. 39 (September 7, 2018): 22480–86. http://dx.doi.org/10.1021/acs.jpcc.8b05940.

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10

Purwanto, A., H. Sukamto, and B. A. Subagyo. "Quantum Carnot Heat Engine Efficiency with Minimal Length." Journal of Modern Physics 06, no. 15 (2015): 2297–302. http://dx.doi.org/10.4236/jmp.2015.615234.

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11

Ferreiro Garcia, Ramon, and Dr Jose Carbia Carril. "Analysis of a thermal cycle that surpass Carnot efficiency undergoing closed polytropic transformations." JOURNAL OF ADVANCES IN PHYSICS 15 (February 19, 2019): 6165–82. http://dx.doi.org/10.24297/jap.v15i0.8029.

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This research work deals with a feasible non-regenerative thermal cycle, composed by two pairs of closed polytropic-isochoric transformations implemented by means of a double acting reciprocating cylinder which differs basically from the conventional Carnot based thermal cycles in that: -it consists of a non condensing mode thermal cycle -all cycle involves only closed transformations, instead of the conventional open processes of the Carnot based thermal cycles, -in the active processes (polytropic path functions), as heat is being absorbed, mechanical work is simultaneously

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12

Aneja, Preety. "Optimization and Efficiency Studies of Heat Engines: A Review." Journal of Advanced Research in Mechanical Engineering and Technology 07, no. 03 (October 7, 2020): 37–58. http://dx.doi.org/10.24321/2454.8650.202006.

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This review aims to study the various theoretical and numerical investigations in the optimization of heat engines. The main focus is to discuss the procedures to derive the efficiency of heat engines under different operating regimes (or optimization criteria) for different models of heat engines such as endreversible models, stochastic models, low-dissipation models, quantum models etc. Both maximum power and maximum efficiency operational regimes are desirable but not economical, so to meet the thermo-ecological considerations, some other compromise-based criteria have been proposed such as

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13

Shaw, John E. "Comparing Carnot, Stirling, Otto, Brayton and Diesel Cycles." Transactions of the Missouri Academy of Science 42, no. 2008 (January 1, 2008): 1–6. http://dx.doi.org/10.30956/0544-540x-42.2008.1.

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Comparing the efficiencies of the Carnot, Stirling, Otto, Brayton and Diesel cycles can be a frustrating experience for the student. The efficiency of Carnot and Stirling cycles depends only on the ratio of the temperature extremes whereas the efficiency of Otto and Brayton cycles depends only on the compression ratio. The efficiency of a Diesel cycle is generally expressed in terms of the temperatures at the four turning points of the cycle or the volumes at these turning points. How does one actually compare the efficiencies of these thermodynamic cycles? To compare the cycles, an expression

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14

NAGATA, Masaru. "Carnot Cycle and Energy Efficiency. Improved Theory of Energy Conversion and Energy Efficiency." Transactions of the Japan Society of Mechanical Engineers Series B 62, no. 603 (1996): 3976–81. http://dx.doi.org/10.1299/kikaib.62.3976.

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15

Yerra, Pavan Kumar, and Chandrasekhar Bhamidipati. "Heat engines at criticality for nonlinearly charged black holes." Modern Physics Letters A 34, no. 27 (September 6, 2019): 1950216. http://dx.doi.org/10.1142/s021773231950216x.

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Within the extended phase–space thermodynamics, we study heat engines in power Yang–Mills and power Maxwell black holes at criticality, as the corresponding nonlinearity power parameters [Formula: see text] and [Formula: see text] are varied. For the computation of efficiency of such engines, starting from power Maxwell black holes, a map is proposed for carrying out the computations in power Yang–Mills theories. On comparison, the approach of efficiency of heat engines to Carnot limit in both the systems is shown to coincide when [Formula: see text], but, for [Formula: see text], Maxwell (Yan

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16

Chang, T. B. "Exergetic Efficiency Optimization for an Irreversible Carnot Heat Engine." Journal of Mechanics 23, no. 2 (June 2007): 181–86. http://dx.doi.org/10.1017/s1727719100001209.

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AbstractIn this paper, an exergetic efficiency optimization method that combines the concept of exergy and finite-time thermodynamic theory is developed to analyze an irreversible heat engine. With the total thermal conductance constraint, the analytical solutions of optimal allocation of thermal conductance and the corresponding maximum exergetic efficiency, thermal efficiency, as well as operating temperatures of hot and cold sides are obtained under a fixed overall heat supply rate. The results show that the exergetic efficiency optimization method can effectively analyze an irreversible he

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17

Hernández, A. Calvo, J. M. M. Roco, S. Velasco, and A. Medina. "Irreversible Carnot cycle under per-unit-time efficiency optimization." Applied Physics Letters 73, no. 6 (August 10, 1998): 853–55. http://dx.doi.org/10.1063/1.122023.

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18

Hondou, Tsuyoshi, and Ken Sekimoto. "Unattainability of Carnot efficiency in the Brownian heat engine." Physical Review E 62, no. 5 (November 1, 2000): 6021–25. http://dx.doi.org/10.1103/physreve.62.6021.

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19

Pednekar, Abhijit. "The Blue System That Can Exceed the Carnot Efficiency." Proceedings of the National Academy of Sciences, India Section A: Physical Sciences 83, no. 1 (February 12, 2013): 59–61. http://dx.doi.org/10.1007/s40010-013-0064-x.

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20

Panarella, Emilio. "Energy saving and climate change mitigation through improved thermodynamic efficiency." Physics Essays 33, no. 3 (September 28, 2020): 283–88. http://dx.doi.org/10.4006/0836-1398-33.3.283.

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The second Law of Thermodynamics is fundamental in the analysis of thermodynamic cycles. It dictates that the conversion of heat to work is limited. It reaches an upper limit in a classical thermodynamic cycle, and such a limit is provided by the Carnot cycle, which is the most efficient. Motivated by a recent allowance of a patent to this author (U.S. Patent 10,079,075), the present study tutorially attempts to expand on the subject and shows that the efficiency can go above the Carnot efficiency, provided a novel cycle is used, and heat, rather than being discarded, is recirculated in the sa

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21

Herrera Alcantar, Hiram Kalid, José Carlos Carvajal García, Osvaldo Rosales Pérez, Rubén Cesar Villarreal-Sánchez, and Priscilla Elizabeth Iglesias-Vázquez. "Dimensionality and geometry effects on a quantum carnot engine efficiency." Revista de Ciencias Tecnológicas 2, no. 1 (February 27, 2019): 45–48. http://dx.doi.org/10.37636/recit.v214548.

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Calculamos la eficiencia de un ciclo de Carnot cuántico para una partícula confinada en dos pozos de potencial infinitos diferentes, un pozo de potencial cilíndrico de radio variable y un pozo de potencial bidimensional cuadrado con periodicidad en uno de sus lados. Encontramos que la eficiencia depende directamente de la dimensionalidad y la geometría del pozo que confina a la partícula.

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22

Bonança, Marcus V. S. "Approaching Carnot efficiency at maximum power in linear response regime." Journal of Statistical Mechanics: Theory and Experiment 2019, no. 12 (December 3, 2019): 123203. http://dx.doi.org/10.1088/1742-5468/ab4e92.

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23

Rebhan, E. "Efficiency of nonideal Carnot engines with friction and heat losses." American Journal of Physics 70, no. 11 (November 2002): 1143–49. http://dx.doi.org/10.1119/1.1501116.

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24

Askin, M., M. Salti, and O. Aydogdu. "Polytropic Carnot heat engine." Modern Physics Letters A 34, no. 24 (August 8, 2019): 1950197. http://dx.doi.org/10.1142/s0217732319501979.

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Recent astrophysical datasets have implied that the universe has entered a speedy expansion phase. The Polytropic gas model, which describes a unified formulation of dark contents (matter plus energy), is one of the most reasonable definitions of this mysterious phenomenon. This interesting formulation allows to simulate the dark contents in the cosmic form of the perfect fluid and gives an interesting point of view in the discussion of fundamental theories of physics. In the first step of our investigation, we discuss the thermal equation-of-state (EoS henceforth) and obtain the EoS and decel

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25

Khalatov, A. A., S. D. Severin, O. S. Stupak, and O. V. Shihabutinova. "EFFICIENCY OF THE REGENERATIVE CYCLE OF BRIGHTON WITH VARIABLE THERMOPHYSICAL PROPERTIES OF THE WORKING FLUID (Part 2)." Thermophysics and Thermal Power Engineering 41, no. 3 (December 18, 2018): 5–13. http://dx.doi.org/10.31472/ttpe.3.2019.1.

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The data about thermodynamic efficiency of the ideal Brighton cycle with heat regeneration with constant thermophysical properties of the working fluid, as well as the Brighton cycle with heat recovery and the wetting of the working fluid at the inlet to the turbine (with variable thermophysical properties of the working fluid). The inapplicability of comparison of the thermal efficiency of the Brighton cycle with heat recovery and the wetting of the working fluid at the inlet to the turbine with the thermal efficiency of the equivalent ideal Carnot cycle is shown. The analysis of the th

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26

Benenti, Giuliano, and Giulio Casati. "Increasing thermoelectric efficiency: dynamical models unveil microscopic mechanisms." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 369, no. 1935 (January 28, 2011): 466–81. http://dx.doi.org/10.1098/rsta.2010.0266.

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Dynamical nonlinear systems provide a new approach to the old problem of increasing the efficiency of thermoelectric machines. In this review, we discuss stylized models of classical dynamics, including non-interacting complex molecules in an ergodic billiard, a disordered hard-point gas and an abstract thermoelectric machine. The main focus will be on the physical mechanisms, unveiled by these dynamical models, which lead to high thermoelectric efficiency approaching the Carnot limit.

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27

Ghanavati, Mehdi, and Hossein Movahhedian. "Self-contained n-qubit quantum refrigerator." International Journal of Quantum Information 12, no. 03 (April 2014): 1450018. http://dx.doi.org/10.1142/s021974991450018x.

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Brunner et al. [Phys. Rev. E 85 (2012) 05111] have claimed that, "essentially only the smallest machines can approach Carnot efficiency". We have verified this claim by raising self-contained four-qubit quantum refrigerator, and we have shown that according to concepts of virtual qubit, it can reach the maximum efficiency in other words Carnot efficiency. But its efficiency, such as self-contained three-qubit quantum refrigerator is not universal. We also investigated a special case of self-contained four-qubit quantum refrigerator, in other words self-contained four-qubit quantum refrigerator

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28

Ibrahim, O. M., S. A. Klein, and J. W. Mitchell. "Optimum Heat Power Cycles for Specified Boundary Conditions." Journal of Engineering for Gas Turbines and Power 113, no. 4 (October 1, 1991): 514–21. http://dx.doi.org/10.1115/1.2906271.

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Optimization of the power output of Carnot and closed Brayton cycles is considered for both finite and infinite thermal capacitance rates of the external fluid streams. The method of Lagrange multipliers is used to solve for working fluid temperatures that yield maximum power. Analytical expressions for the maximum power and the cycle efficiency at maximum power are obtained. A comparison of the maximum power from the two cycles for the same boundary conditions, i.e., the same heat source/sink inlet temperatures, thermal capacitance rates, and heat exchanger conductances, shows that the Brayto

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29

Sadia, Yatir, Dana Ben-Ayoun, and Yaniv Gelbstein. "Evaporation–condensation effects on the thermoelectric performance of PbTe-based couples." Physical Chemistry Chemical Physics 19, no. 29 (2017): 19326–33. http://dx.doi.org/10.1039/c7cp03159a.

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30

Opatrný, Tomáš, and Marlan O. Scully. "Enhancing Otto-mobile Efficiency via Addition of a Quantum Carnot Cycle." Fortschritte der Physik 50, no. 5-7 (May 2002): 657–63. http://dx.doi.org/10.1002/1521-3978(200205)50:5/7<657::aid-prop657>3.0.co;2-#.

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31

de Boer, P. C. T. "Maximum Attainable Performance of Stirling Engines and Refrigerators." Journal of Heat Transfer 125, no. 5 (September 23, 2003): 911–15. http://dx.doi.org/10.1115/1.1597618.

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The flow through the regenerator of a Stirling engine is driven by differences of pressure in the compression and expansion spaces. These differences lead to power dissipation in the regenerator. Using linearized theory, it is shown that this dissipation severely limits the maximum attainable thermal efficiency and nondimensional power output. The maximum attainable values are independent of the value of the regenerator conductance. For optimized nondimensional power output, the thermal efficiency equals only half the Carnot value. The power dissipated in the regenerator is removed as part of

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32

Johansson, Jonas. "Pedagogical Visualization of a Nonideal Carnot Engine." Journal of Thermodynamics 2014 (July 21, 2014): 1–7. http://dx.doi.org/10.1155/2014/217187.

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We have implemented a visualization tool for the demonstration of a nonideal Carnot engine, operating at finite time. The cycle time can be varied using a slide bar and the pressure-volume, temperature-entropy, power-time, and efficiency-time diagrams change interactively and are shown on one screen. We have evaluated the visualization tool among engineering students at university level during an introductory course on thermodynamics and we review and discuss the outcome of the evaluation.

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33

Karim, M., Owen Arthur, Prasad Yarlagadda, Majedul Islam, and Md Mahiuddin. "Performance Investigation of High Temperature Application of Molten Solar Salt Nanofluid in a Direct Absorption Solar Collector." Molecules 24, no. 2 (January 14, 2019): 285. http://dx.doi.org/10.3390/molecules24020285.

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Nanofluids have great potential in a wide range of fields including solar thermal applications, where molten salt nanofluids have shown great potential as a heat transfer fluid (HTF) for use in high temperature solar applications. However, no study has investigated the use of molten salt nanofluids as the HTF in direct absorption solar collector systems (DAC). In this study, a two dimensional CFD model of a direct absorption high temperature molten salt nanofluid concentrating solar receiver has been developed to investigate the effects design and operating variables on receiver performance. I

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34

Lefebvre, Lucie, Ward De Paepe, Mario L. Ferrari, and Alberto Traverso. "Carnot cycle in practice: compensating inefficiencies of ORC expanders through thermal regeneration." E3S Web of Conferences 238 (2021): 10005. http://dx.doi.org/10.1051/e3sconf/202123810005.

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The Organic Rankine Cycle (ORC) is a thermodynamic cycle that can operate with a hot source over a wide range of temperatures, especially with low-grade heat (below 200°C). One of the main limitations for the success of small-scale ORC cycles (few to 100 kWe) is the relatively low isentropic efficiency of the typically used turbomachinery. Low turbine efficiency leads to low ORC cycle performance. To increase the performance of the cycle, the turbine efficiency must be increase, however, this significantly increases the cost of the machinery, making the cycle less profitable. In this work, the

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35

Ma, Yu-Han. "Effect of Finite-Size Heat Source’s Heat Capacity on the Efficiency of Heat Engine." Entropy 22, no. 9 (September 8, 2020): 1002. http://dx.doi.org/10.3390/e22091002.

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Heat engines used to output useful work have important practical significance, which, in general, operate between heat baths of infinite size and constant temperature. In this paper, we study the efficiency of a heat engine operating between two finite-size heat sources with initial temperature difference. The total output work of such heat engine is limited due to the finite heat capacity of the sources. We firstly investigate the effects of different heat capacity characteristics of the sources on the heat engine’s efficiency at maximum work (EMW) in the quasi-static limit. Moreover, it is f

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36

Chmielniak, Tadeusz, and Henryk Łukowicz. "Condensing power plant cycle — assessing possibilities of improving its efficiency." Archives of Thermodynamics 31, no. 3 (September 1, 2010): 105–13. http://dx.doi.org/10.2478/v10173-010-0017-6.

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Condensing power plant cycle — assessing possibilities of improving its efficiency This paper presents a method for assessing the degree of approaching the paper output of the Clausius-Rankine cycle to the Carnot cycle. The computations to illustrate its use were performed for parameters characteristic of the current state of development of condensing power plants as well as in accordance with predicted trends for their further enhancing. Moreover there are presented computations of energy dissipation in the machines and devices working in such a cycle.

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Hassanzadeh, H., and S. H. Mansouri. "Efficiency of ideal fuel cell and Carnot cycle from a fundamental perspective." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 219, no. 4 (June 1, 2005): 245–54. http://dx.doi.org/10.1243/095765005x28571.

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In this paper, we accept the fact that fuel cell and heat engine efficiencies are both constrained by the second law of thermodynamics and neither one is able to break this law. However, we have shown that this statement does not mean the two systems should have the same maximum thermal efficiency when being fed by the same amounts of chemical reactants. The intrinsic difference between fuel cells (electrochemical systems) and heat engines (combustion engines) efficiencies is a fundamental one with regard to the conversion of chemical energy of reactions into electrical work. The sole reason h

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38

Tjiang, Paulus C., and Sylvia H. Sutanto. "The efficiency of the Carnot cycle with arbitrary gas equations of state." European Journal of Physics 27, no. 4 (May 2, 2006): 719–26. http://dx.doi.org/10.1088/0143-0807/27/4/004.

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Badescu, Viorel. "Is Carnot efficiency the upper bound for work extraction from thermal reservoirs?" EPL (Europhysics Letters) 106, no. 1 (April 1, 2014): 18006. http://dx.doi.org/10.1209/0295-5075/106/18006.

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Reed, B. Cameron. "A note on the overall efficiency of back-to-back Carnot cycles." Physics Education 56, no. 4 (April 21, 2021): 043004. http://dx.doi.org/10.1088/1361-6552/abf5b1.

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Ren, Xuefeng, Yiran Wang, Anmin Liu, Zhihong Zhang, Qianyuan Lv, and Bihe Liu. "Current progress and performance improvement of Pt/C catalysts for fuel cells." Journal of Materials Chemistry A 8, no. 46 (2020): 24284–306. http://dx.doi.org/10.1039/d0ta08312g.

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Fuel cell is an electrochemical device, which can directly convert the chemical energy of fuel into electric energy, without heat process, not limited by Carnot cycle, high energy conversion efficiency, no noise and pollution.

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Bannon, Peter R. "Entropy Production and Climate Efficiency." Journal of the Atmospheric Sciences 72, no. 8 (August 1, 2015): 3268–80. http://dx.doi.org/10.1175/jas-d-14-0361.1.

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Abstract Earth’s climate system is a heat engine, absorbing solar radiation at a mean input temperature Tin and emitting terrestrial radiation at a lower, mean output temperature Tout &lt; Tin. These mean temperatures, defined as the ratio of the energy to entropy input or output, determine the Carnot efficiency of the system. The climate system, however, does no external work, and hence its work efficiency is zero. The system does produce entropy and exports it to space. The efficiency associated with this entropy production is defined for two distinct representations of the climate syste

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Pal, P. S., Arnab Saha, and A. M. Jayannavar. "Operational characteristics of single-particle heat engines and refrigerators with time-asymmetric protocol." International Journal of Modern Physics B 30, no. 31 (December 5, 2016): 1650219. http://dx.doi.org/10.1142/s0217979216502192.

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We have studied the single-particle heat engine and refrigerator driven by time-asymmetric protocol of finite duration. Our system consists of a particle in a harmonic trap with time-periodic strength that drives the particle cyclically between two baths. Each cycle consists of two isothermal steps at different temperatures and two adiabatic steps connecting them. The system works in irreversible mode of operation even in the quasistatic regime. This is indicated by finite entropy production even in the large cycle time limit. Consequently, Carnot efficiency for heat engine or Carnot coefficie

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Smith, I. K. "Matching and Work Ratio in Elementary Thermal Power Plant Theory." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 206, no. 4 (November 1992): 257–62. http://dx.doi.org/10.1243/pime_proc_1992_206_042_02.

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For most thermal power plant, the Carnot cycle efficiency is not the true ideal. Matching the cycle to the source leads to alternative limits and improved perceptions of how practical power plant can be improved. A method of including the work ratio into an ideal cycle analysis is presented which simplifies the estimation of practical power plant efficiencies and highlights the historic course of thermal efficiency improvement.

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Woods, Mischa P., Nelly Huei Ying Ng, and Stephanie Wehner. "The maximum efficiency of nano heat engines depends on more than temperature." Quantum 3 (August 19, 2019): 177. http://dx.doi.org/10.22331/q-2019-08-19-177.

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Sadi Carnot's theorem regarding the maximum efficiency of heat engines is considered to be of fundamental importance in thermodynamics. This theorem famously states that the maximum efficiency depends only on the temperature of the heat baths used by the engine, but not on the specific structure of baths. Here, we show that when the heat baths are finite in size, and when the engine operates in the quantum nanoregime, a revision to this statement is required. We show that one may still achieve the Carnot efficiency, when certain conditions on the bath structure are satisfied; however if that i

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Ye, Wenlian, Zhe Yang, and Yingwen Liu. "Exergy loss analysis of the regenerator in a solar Stirling engine." Thermal Science 22, Suppl. 2 (2018): 729–37. http://dx.doi.org/10.2298/tsci170911058y.

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Abstract (sommario):

In order to evaluate the irreversibility and exergy losses of the regenerators in a solar beta-type free piston Stirling engine due to flow friction, 1-D thermodynamic model to quantify exergy loss in the regenerators are built. The effects of important parameters, such as oscillating flow pressure drop, the exergy loss to flow friction, the exergy losses to conduction heat transfer at the hot and cold side of the regenerator and the percentage of Carnot efficiency of Stirling engine are presented and studied in detail. Results show that exergy loss decreases with the increase of the porosity

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47

Smith, Zackary, Priyo S. Pal, and Sebastian Deffner. "Endoreversible Otto Engines at Maximal Power." Journal of Non-Equilibrium Thermodynamics 45, no. 3 (July 26, 2020): 305–10. http://dx.doi.org/10.1515/jnet-2020-0039.

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Abstract (sommario):

AbstractDespite its idealizations, thermodynamics has proven its power as a predictive theory for practical applications. In particular, the Curzon–Ahlborn efficiency provides a benchmark for any real engine operating at maximal power. Here we further develop the analysis of endoreversible Otto engines. For a generic class of working mediums, whose internal energy is proportional to some power of the temperature, we find that no engine can achieve the Carnot efficiency at finite power. However, we also find that for the specific example of photonic engines the efficiency at maximal power is hi

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48

Chen, Jincan. "The maximum power output and maximum efficiency of an irreversible Carnot heat engine." Journal of Physics D: Applied Physics 27, no. 6 (June 14, 1994): 1144–49. http://dx.doi.org/10.1088/0022-3727/27/6/011.

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49

Parker, Michael C., and Stuart D. Walker. "A Unified Carnot Thermodynamic and Shannon Channel Capacity Information-Theoretic Energy Efficiency Analysis." IEEE Transactions on Communications 62, no. 10 (October 2014): 3552–59. http://dx.doi.org/10.1109/tcomm.2014.2351412.

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50

Abe, Sumiyoshi. "General Formula for the Efficiency of Quantum-Mechanical Analog of the Carnot Engine." Entropy 15, no. 12 (April 17, 2013): 1408–15. http://dx.doi.org/10.3390/e15041408.

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