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Journal articles on the topic 'Heat-engines'

Author: Grafiati
Published: 4 June 2021
Last updated: 31 July 2024

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1

Johnson, Clifford V. "Holographic heat engines as quantum heat engines." Classical and Quantum Gravity 37, no. 3 (January 13, 2020): 034001. http://dx.doi.org/10.1088/1361-6382/ab5ba9.

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2

Kuboyama, Tatsuya, Hidenori Kosaka, Tetsuya Aizawa, and Yukio Matsui. "A Study on Heat Loss in DI Diesel Engines(Diesel Engines, Performance and Emissions, Heat Recovery)." Proceedings of the International symposium on diagnostics and modeling of combustion in internal combustion engines 2004.6 (2004): 111–18. http://dx.doi.org/10.1299/jmsesdm.2004.6.111.

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3

Gemmen, R., M. C. Williams, and G. Richards. "Electrochemical Heat Engines." ECS Transactions 65, no. 1 (February 2, 2015): 243–52. http://dx.doi.org/10.1149/06501.0243ecst.

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4

Willoughby, H. E. "Hurricane heat engines." Nature 401, no. 6754 (October 1999): 649–50. http://dx.doi.org/10.1038/44287.

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5

Johnson, Clifford V. "Holographic heat engines." Classical and Quantum Gravity 31, no. 20 (October 1, 2014): 205002. http://dx.doi.org/10.1088/0264-9381/31/20/205002.

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6

KRIBUS, ABRAHAM. "Heat Transfer in Miniature Heat Engines." Heat Transfer Engineering 25, no. 4 (June 2004): 1–3. http://dx.doi.org/10.1080/01457630490443505.

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7

Courtney, W. "Cool running heat engines." Journal of Biological Physics and Chemistry 21, no. 3 (September 30, 2021): 79–87. http://dx.doi.org/10.4024/12co20a.jbpc.21.03.

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8

Holubec, Viktor, and Artem Ryabov. "Fluctuations in heat engines." Journal of Physics A: Mathematical and Theoretical 55, no. 1 (December 15, 2021): 013001. http://dx.doi.org/10.1088/1751-8121/ac3aac.

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Abstract At the dawn of thermodynamics, Carnot’s constraint on efficiency of heat engines stimulated the formulation of one of the most universal physical principles, the second law of thermodynamics. In recent years, the field of heat engines acquired a new twist due to enormous efforts to develop and describe microscopic machines based on systems as small as single atoms. At microscales, fluctuations are an inherent part of dynamics and thermodynamic variables such as work and heat fluctuate. Novel probabilistic formulations of the second law imply general symmetries and limitations for the fluctuating output power and efficiency of the small heat engines. Will their complete understanding ignite a similar revolution as the discovery of the second law? Here, we review the known general results concerning fluctuations in the performance of small heat engines. To make the discussion more transparent, we illustrate the main abstract findings on exactly solvable models and provide a thorough theoretical introduction for newcomers to the field.
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9

Johnson, Clifford V. "Taub–Bolt heat engines." Classical and Quantum Gravity 35, no. 4 (January 12, 2018): 045001. http://dx.doi.org/10.1088/1361-6382/aaa010.

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10

Ahmed, Wasif, Hong Zhe Chen, Elliott Gesteau, Ruth Gregory, and Andrew Scoins. "Conical holographic heat engines." Classical and Quantum Gravity 36, no. 21 (October 14, 2019): 214001. http://dx.doi.org/10.1088/1361-6382/ab470b.

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11

Poletayev, Andrey D., Ian S. McKay, William C. Chueh, and Arun Majumdar. "Continuous electrochemical heat engines." Energy & Environmental Science 11, no. 10 (2018): 2964–71. http://dx.doi.org/10.1039/c8ee01137k.

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12

Solomon, Dan. "Thermomagnetic mechanical heat engines." Journal of Applied Physics 65, no. 9 (May 1989): 3687–93. http://dx.doi.org/10.1063/1.342595.

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13

Valdès, L. C. "Competitive solar heat engines." Renewable Energy 29, no. 11 (September 2004): 1825–42. http://dx.doi.org/10.1016/j.renene.2004.02.008.

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14

Hilt, Matthew G., K. A. Pestka, G. D. Mahan, J. D. Maynard, D. Pickrell, B. Na, and J. Tamburini. "Unconventional thermoacoustic heat engines." Journal of the Acoustical Society of America 119, no. 5 (May 2006): 3414. http://dx.doi.org/10.1121/1.4786811.

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15

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 Ω criterion (ecological criterion) and efficient power criterion. Thus, heat engines can be optimized to work at an efficiency which may not be the maximum (Carnot) efficiency. The optimization efficiency obtained under each criterion shows a striking universal behaviour in the near-equilibrium regime. We also discussed a multi-parameter combined objective function of heat engines. The optimization efficiency derived from the multi-parameter combined objective function includes a variety of optimization efficiencies, such as the efficiency at the maximum power, efficiency at the maximum efficiency-power state, efficiency at the maximum criterion, and Carnot efficiency. Thus, a comparison of optimization of heat engines under different criteria enables to choose the suitable one for the best performance of heat engine under different conditions.
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16

Huleihil, Mahmoud, and Gedalya Mazor. "Golden Section Heat Engines and Heat Pumps." International Journal of Arts 2, no. 2 (August 31, 2012): 1–7. http://dx.doi.org/10.5923/j.arts.20120202.01.

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17

Kondrashov, A. V., and A. A. Trinchenko. "Condensation heat recycling system for heat engines." Power engineering: research, equipment, technology 25, no. 6 (January 12, 2024): 67–77. http://dx.doi.org/10.30724/1998-9903-2023-25-6-67-77.

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THE RELEVANCE of the research lies in the need to use waste heat, which is a byproduct of the operation of energy machines, to increase the efficiency of their operation. Using the example of introducing a system for recovering condensation heat and using it in an air heating system, the possibility of beneficial use of waste heat generated by refrigeration machines used to freeze the ice arena of a sports complex was confirmed.TARGET. Development of a system for recycling the condensation heat of refrigeration machines to use waste heat when organizing air heating of a building.METHODS. Study of engineering systems for the possibility of beneficial use of low-grade heat. Organization of a system for recycling the condensation heat of refrigeration machines in a sports complex. Installation of a measuring stand, including, among other things, a heat meter, a heat calculator, a controller for transferring measurement results to a personal computer, carrying out the necessary calculations, their subsequent processing and analysis.RESULTS. At a facility with constant operation of refrigeration machines and a need for heating, a condensation heat recovery system has been introduced. The possibility of implementing the proposed system without long-term downtime of the main equipment is shown.CONCLUSION. The introduction of a condensation heat recovery system increased the energy efficiency of the system, which allowed for 2.6 million rubles. reduce utility bills of the heat supply organization, as well as reduce thermal pollution of the environment by at least 1.4 GW per year.
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18

Ke, Zhenying, Yang Xu, and Zihao Guo. "Analysis of the social impact of heat engine and its future application." IOP Conference Series: Earth and Environmental Science 1011, no. 1 (April 1, 2022): 012007. http://dx.doi.org/10.1088/1755-1315/1011/1/012007.

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Abstract This paper aims to evaluate the social impact of the heat engine and analyze the application of heat engines in the future. This paper starts with some background information on heat engines and the challenges of gas pollution and gas shortage. The concepts of efficiency and environmental friendliness of the heat engine are widely discussed, which speeds up the development of several kinds of heat engines. We discuss the application of heat engines in different industries from three main aspects: agriculture, marine engine, and aviation. They improve our daily life and provide the required energy to the community. Thermoacoustic Heat Engine (TAHE), Liquid Air Cycle Engines (LACE), and a new class of Heat engine without the expulsion of reaction mass are introduced in this paper. Furthermore, the article will cover some futures. One is artificial intelligence, and another one is about biofuel, which helps heat engines to have higher efficiency and less pollution, and also how heat engines are involved in the next decade.
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19

Derényi, Imre, and R. Astumian. "Efficiency of Brownian heat engines." Physical Review E 59, no. 6 (June 1999): R6219—R6222. http://dx.doi.org/10.1103/physreve.59.r6219.

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20

Sinitsyn, N. A. "Fluctuation relation for heat engines." Journal of Physics A: Mathematical and Theoretical 44, no. 40 (September 14, 2011): 405001. http://dx.doi.org/10.1088/1751-8113/44/40/405001.

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21

Anderson, Warren G. "Relativistic heat engines and efficiency." Physics Letters A 223, no. 1-2 (November 1996): 23–27. http://dx.doi.org/10.1016/s0375-9601(96)00715-3.

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22

Grazzini, Giuseppe. "Work from irreversible heat engines." Energy 16, no. 4 (April 1991): 747–55. http://dx.doi.org/10.1016/0360-5442(91)90024-g.

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23

Richards, George, Randall S. Gemmen, and Mark C. Williams. "Solid – state electrochemical heat engines." International Journal of Hydrogen Energy 40, no. 9 (March 2015): 3719–25. http://dx.doi.org/10.1016/j.ijhydene.2015.01.043.

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24

Löffler, Michael. "Batch Processes in Heat Engines." Energy 125 (April 2017): 788–94. http://dx.doi.org/10.1016/j.energy.2017.02.105.

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25

Martínez, Ignacio A., Édgar Roldán, Luis Dinis, and Raúl A. Rica. "Colloidal heat engines: a review." Soft Matter 13, no. 1 (2017): 22–36. http://dx.doi.org/10.1039/c6sm00923a.

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26

Hsu, S. M., J. M. Perez, and C. S. Ku. "Advanced lubricants for heat engines." Journal of Synthetic Lubrication 14, no. 2 (July 1997): 143–56. http://dx.doi.org/10.1002/jsl.3000140204.

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27

Nuwayhid, R. Y., and F. Moukalled. "Effect of heat leak on cascaded heat engines." Energy Conversion and Management 43, no. 15 (October 2002): 2067–83. http://dx.doi.org/10.1016/s0196-8904(01)00146-7.

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28

Lampinen, Markku J., and Jari Vuorisalo. "Heat accumulation function and optimization of heat engines." Journal of Applied Physics 69, no. 2 (January 15, 1991): 597–605. http://dx.doi.org/10.1063/1.347392.

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29

Ebrahimi, Alireza, Soheil Jafari, and Theoklis Nikolaidis. "Heat Load Development and Heat Map Sensitivity Analysis for Civil Aero-Engines." International Journal of Turbomachinery, Propulsion and Power 9, no. 3 (July 2, 2024): 25. http://dx.doi.org/10.3390/ijtpp9030025.

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The design complexity of the new generation of civil aero-engines results in higher demands on engines’ components, higher component temperatures, higher heat generation, and, finally, critical thermal management issues. This paper will propose a methodological approach to creating physics-based models for heat loads developed by sources, as well as a systematic sensitivity analysis to identify the effects of design parameters on the thermal behavior of civil aero-engines. The ranges and levels of heat loads generated by heat sources (e.g., accessory gearbox, bearing, pumps, etc.) and the heat absorption capacity of heat sinks (e.g., engine fuel, oil, and air) are discussed systematically. The practical research challenges for thermal management system design and development for the new and next generation of turbofan engines will then be addressed through a sensitivity analysis of the heat load values as well as the heat sink flow rates. The potential solutions for thermal performance enhancements of propulsion systems will be proposed and discussed accordingly.
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30

Velidi, Gurunadh, and Chun Sang Yoo. "A Review on Flame Stabilization Technologies for UAV Engine Micro-Meso Scale Combustors: Progress and Challenges." Energies 16, no. 9 (May 8, 2023): 3968. http://dx.doi.org/10.3390/en16093968.

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Unmanned aerial vehicles (UAV)s have unique requirements that demand engines with high power-to-weight ratios, fuel efficiency, and reliability. As such, combustion engines used in UAVs are specialized to meet these requirements. There are several types of combustion engines used in UAVs, including reciprocating engines, turbine engines, and Wankel engines. Recent advancements in engine design, such as the use of ceramic materials and microscale combustion, have the potential to enhance engine performance and durability. This article explores the potential use of combustion-based engines, particularly microjet engines, as an alternative to electrically powered unmanned aerial vehicle (UAV) systems. It provides a review of recent developments in UAV engines and micro combustors, as well as studies on flame stabilization techniques aimed at enhancing engine performance. Heat recirculation methods have been proposed to minimize heat loss to the combustor walls. It has been demonstrated that employing both bluff-body stabilization and heat recirculation methods in narrow channels can significantly improve combustion efficiency. The combination of flame stabilization and heat recirculation methods has been observed to significantly improve the performance of micro and mesoscale combustors. As a result, these technologies hold great promise for enhancing the performance of UAV engines.
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31

Kadam, Shrutika. "Analysis of TAE by Modifying Cold and Hot Heat Exchanger Using Waste Heat Recovery." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 05 (May 29, 2024): 1–5. http://dx.doi.org/10.55041/ijsrem35022.

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Abstract Thermoacoustic engines, a promising technology at the intersection of thermodynamics and acoustics, offer a novel and sustainable method for recovering waste heat from various industrial processes. This paper explores the principles of thermoacoustic engines and their potential application in waste heat recovery systems. By converting waste heat into useful mechanical work through acoustic phenomena, thermoacoustic engines contribute to energy efficiency and greenhouse gas reduction. This abstract summarizes the key concepts, benefits, and challenges associated with thermoacoustic waste heat recovery, emphasizing its role in addressing environmental concerns and advancing sustainable energy practices.
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32

Yao, Xuyichen. "Stirling engines: Advancements, applications, and environmental benefits." Theoretical and Natural Science 25, no. 1 (December 20, 2023): 186–91. http://dx.doi.org/10.54254/2753-8818/25/20240963.

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The increasing adoption of Stirling engines in contemporary industries is driven by their potential to address critical issues of energy efficiency and emissions reduction. Stirling engines offer higher energy efficiency, lower noise and emissions, and versatility in utilizing various heat sources, making them a promising solution for enhancing environmental preservation and energy diversity. This paper examines the growing adoption of Stirling engines in diverse industries, driven by the urgent need to address energy efficiency and emissions challenges. The paper outlines the core principles and advantages of Stirling engines, highlighting their potential to enhance energy efficiency, preserve the environment, and diversify energy sources. Furthermore, the paper underscores significant industrial and aviation applications of Stirling engines, particularly in vehicle propulsion, heat pumps, and electricity generation. Notably, the automotive Stirling engine excels in fuel efficiency and emissions reduction, offering a viable alternative to traditional internal combustion engines. Stirling engines also prove effective in heat pump systems, contributing to efficient building heating and cooling. In conclusion, despite challenges such as material requirements and heat loss, Stirling engines hold great promise as sustainable and eco-friendly thermal engines. As global concerns regarding energy and the environment intensify, Stirling engines offer a compelling pathway to improved energy efficiency, reduced emissions, and a more diversified energy landscape, driving innovation across sectors.
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33

Yang, Zongming, Volodymyr Korobko, Mykola Radchenko, and Roman Radchenko. "Improving Thermoacoustic Low-Temperature Heat Recovery Systems." Sustainability 14, no. 19 (September 27, 2022): 12306. http://dx.doi.org/10.3390/su141912306.

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The existence and development of modern society require significant amounts of available energy. Combustion engines are the main sources of heat. Their operation is accompanied by the formation of large volumes of emissions, which have different temperatures and contain harmful substances ejected into the environment. Therefore, the urgent problem today is the reduction in heat emissions. This might be achieved through a reduction in the amount of these pollutants by improving primary heat engines, converting to new, alternative types of fuel, and at the same time, to carbon-free fuel. However, such measures only reduce the temperature level of waste heat but not its volume. Conventional technologies for the utilization of heat emissions are ineffective for using heat with temperatures below 500 K. Thermoacoustic technologies can be used to convert such low-temperature heat emissions into mechanical work or electricity. This article is focused on analyzing the possibilities of improving the thermoacoustic engines of energy-saving systems through the rational organization of thermoacoustic energy conversion processes. An original mathematical model of energy exchange between the internal elements of thermoacoustic engines is developed. It is shown that the use of recuperative heat exchangers in thermoacoustic engines leads to a decrease in their efficiency by 10–30%. From the research results, new methods of increasing the efficiency of low-temperature engines of energy-saving systems are proposed.
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34

Vetchanin, Evgeniy, and Valentin Tenenev. "Simulation of gas dynamics in heat engines of complex shapes." Modern science: researches, ideas, results, technologies 8, no. 2 (June 15, 2017): 29–34. http://dx.doi.org/10.23877/ms.ts.39.004.

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35

JONES, JOHN DEWEY. "Heat Transfer Processes in Low-Heat-Rejection Diesel Engines." Heat Transfer Engineering 8, no. 3 (January 1987): 90–99. http://dx.doi.org/10.1080/01457638708962807.

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36

Odes, Ron, and Abraham Kribus. "Performance of heat engines with non-zero heat capacity." Energy Conversion and Management 65 (January 2013): 108–19. http://dx.doi.org/10.1016/j.enconman.2012.08.010.

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37

Moukalled, F., R. Y. Nuwayhid, and N. Noueihed. "The efficiency of endoreversible heat engines with heat leak." International Journal of Energy Research 19, no. 5 (July 1995): 377–89. http://dx.doi.org/10.1002/er.4440190503.

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38

Matos, Wagner Santos, Juliano de Assis Pereira, Josef Klammer, José Antonio Perrella Balestieri, Alex Mendonça Bimbato, and Marcelino Pereira do Nascimento. "HEAT REJECTION AVOIDANCE IN COMBUSTION ENGINES." Brazilian Journal of Development 6, no. 7 (2020): 53369–92. http://dx.doi.org/10.34117/bjdv6n7-835.

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39

Myers, Nathan M., Jacob McCready, and Sebastian Deffner. "Quantum Heat Engines with Singular Interactions." Symmetry 13, no. 6 (May 31, 2021): 978. http://dx.doi.org/10.3390/sym13060978.

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By harnessing quantum phenomena, quantum devices have the potential to outperform their classical counterparts. Here, we examine using wave function symmetry as a resource to enhance the performance of a quantum Otto engine. Previous work has shown that a bosonic working medium can yield better performance than a fermionic medium. We expand upon this work by incorporating a singular interaction that allows the effective symmetry to be tuned between the bosonic and fermionic limits. In this framework, the particles can be treated as anyons subject to Haldane’s generalized exclusion statistics. Solving the dynamics analytically using the framework of “statistical anyons”, we explore the interplay between interparticle interactions and wave function symmetry on engine performance.
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40

Yerra, Pavan Kumar, and Chandrasekhar Bhamidipati. "Critical heat engines in massive gravity." Classical and Quantum Gravity 37, no. 20 (September 26, 2020): 205020. http://dx.doi.org/10.1088/1361-6382/abb2d1.

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41

Atchley, Anthony. "Sound waves rev up heat engines." Physics World 12, no. 8 (August 1999): 21–22. http://dx.doi.org/10.1088/2058-7058/12/8/27.

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42

Larsen, D. C., J. W. Adams, L. R. Johnson, A. P. S. Teotia, L. G. Hill, and T. Z. Kattamis. "Ceramic Materials for Advanced Heat Engines." Journal of Engineering Materials and Technology 109, no. 1 (January 1, 1987): 99. http://dx.doi.org/10.1115/1.3225945.

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43

Páv, Karel, Václav Rychtář, and Václav Vorel. "Heat balance in modern automotive engines." Journal of Middle European Construction and Design of Cars 10, no. 2 (November 1, 2012): 6–13. http://dx.doi.org/10.2478/v10138-012-0007-7.

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Shrnutí Tento příspěvek obsahuje informace o přerozdělení tepla v současných vozidlových spalovacích motorech. Vycházelo se z různých konstrukcí především zážehových motorů s rozdílnými zdvihovými objemy, vznětové motory jsou však také zmíněny. Je zde uveden postup výpočtu tepelné bilance motoru, stejně tak, jako obtíže spojené se získáním vstupních dat měřením. Byl navržen a ověřen empirický vztah pro výpočet tepelného toku do chladící kapaliny, který umožňuje snadné nalezení nekorektně změřených pracovních bodů motoru už v počáteční fázi automatického měřícího cyklu. Naměřené hodnoty byly srovnány s výpočtem pomocí programu GT-Power. Na závěr je uvedeno srovnání různých typů motorů s ohledem na velikost tepelného toku do chladící kapaliny
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44

Pilgram, Sebastian, David Sánchez, and Rosa López. "Quantum point contacts as heat engines." Physica E: Low-dimensional Systems and Nanostructures 74 (November 2015): 447–50. http://dx.doi.org/10.1016/j.physe.2015.08.003.

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45

Chakraborty, Avik, and Clifford V. Johnson. "Benchmarking black hole heat engines, II." International Journal of Modern Physics D 27, no. 16 (December 2018): 1950006. http://dx.doi.org/10.1142/s0218271819500068.

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We extend to nonstatic black holes our benchmarking scheme that allows for cross–comparison of the efficiencies of asymptotically AdS black holes used as working substances in heat engines. We use a circular cycle in the [Formula: see text] plane as the benchmark cycle. We study Kerr black holes in four spacetime dimensions as an example. As in the static case, we find an exact formula for the benchmark efficiency in an ideal gas-like limit, which may serve as an upper bound for rotating black hole heat engines in a thermodynamic ensemble with fixed angular velocity. We use the benchmarking scheme to compare Kerr to static black holes charged under Maxwell and Born–Infeld sectors.
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46

Chakraborty, Avik, and Clifford V. Johnson. "Benchmarking black hole heat engines, I." International Journal of Modern Physics D 27, no. 16 (December 2018): 1950012. http://dx.doi.org/10.1142/s0218271819500123.

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We present the results of initiating a benchmarking scheme that allows for cross-comparison of the efficiencies of black holes used as working substances in heat engines. We use a circular cycle in the [Formula: see text] plane as the benchmark engine. We test it on Einstein–Maxwell, Gauss–Bonnet and Born–Infeld black holes. Also, we derive a new and surprising exact result for the efficiency of a special “ideal gas” system to which all the black holes asymptote.
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47

Arcoumanis, C., P. Cutter, and D. S. Whitelaw. "Heat Transfer Processes in Diesel Engines." Chemical Engineering Research and Design 76, no. 2 (February 1998): 124–32. http://dx.doi.org/10.1205/026387698524695.

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48

Wei, Shao-Wen, and Yu-Xiao Liu. "Charged AdS black hole heat engines." Nuclear Physics B 946 (September 2019): 114700. http://dx.doi.org/10.1016/j.nuclphysb.2019.114700.

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49

Long, Rui, and Wei Liu. "Ecological optimization for general heat engines." Physica A: Statistical Mechanics and its Applications 434 (September 2015): 232–39. http://dx.doi.org/10.1016/j.physa.2015.04.016.

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50

Senft, J. R. "Mechanical efficiency of kinematic heat engines." Journal of the Franklin Institute 324, no. 2 (January 1987): 273–90. http://dx.doi.org/10.1016/0016-0032(87)90066-4.

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