{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T00:42:12Z","timestamp":1760143332344,"version":"build-2065373602"},"reference-count":19,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2024,1,31]],"date-time":"2024-01-31T00:00:00Z","timestamp":1706659200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Entropy"],"abstract":"<jats:p>This paper presents a continuation of the Chambadal model optimization of the irreversible Carnot engine. We retrieved the results presented in the Special Issue \u201cCarnot Cycle and Heat Engine Fundamentals and Applications II\u201d and enriched them with new contributions that allowed comparing two points of view: (1) the now classical one, centered on entropy production in the four processes of the cycle, which introduces the action of entropy production, with several sequential optimizations; (2) the new one that is relative to an energy degradation approach. The same d\u00e9marche of sequential optimization was used, but the results were slightly different. We estimate that the second approach is more representative of physics by emphasizing the energy conservation and the existence on an upper and a lower bound in the mechanical energy and power output of the engine.<\/jats:p>","DOI":"10.3390\/e26020125","type":"journal-article","created":{"date-parts":[[2024,1,31]],"date-time":"2024-01-31T08:44:06Z","timestamp":1706690646000},"page":"125","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Improved Chambadal Model with New Optimization Results"],"prefix":"10.3390","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3308-5528","authenticated-orcid":false,"given":"Michel","family":"Feidt","sequence":"first","affiliation":[{"name":"Laboratory of Energetics, Theoretical and Applied Mechanics (LEMTA), URA CNRS 7563, University of Lorraine, 54518 Vandoeuvre-l\u00e8s-Nancy, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0954-7286","authenticated-orcid":false,"given":"Monica","family":"Costea","sequence":"additional","affiliation":[{"name":"Department of Engineering Thermodynamics, National University of Science and Technology POLITEHNICA Bucharest, 060042 Bucharest, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,1,31]]},"reference":[{"key":"ref_1","unstructured":"Carnot, S. (1953). R\u00e9flexion sur la Puissance Motrice du feu et des Machines Propres \u00e0 D\u00e9velopper Cette Puissance, Albert Blanchard. (In French)."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"22","DOI":"10.1119\/1.10023","article-title":"Efficiency of a Carnot Engine at Maximum Power Output","volume":"43","author":"Curzon","year":"1975","journal-title":"Am. J. Phys."},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Feidt, M., and Costea, M. (2019). Progress in Carnot and Chambadal Modeling of Thermomechanical Engine by Considering Entropy Production and Heat Transfer Entropy. Entropy, 21.","DOI":"10.3390\/e21121232"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Feidt, M. (2017). The History and Perspectives of Efficiency at Maximum Power of the Carnot Engine. 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Rev."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"244","DOI":"10.1016\/j.tsep.2018.08.016","article-title":"Review on solar Stirling engine: Development and performance","volume":"8","author":"Singh","year":"2018","journal-title":"Therm. Sci. Eng. Prog."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Kosloff, R., and Rezek, Y. (2017). The Quantum Harmonic Otto Cycle. Entropy, 19.","DOI":"10.3390\/e19040136"},{"key":"ref_10","first-page":"6665740","article-title":"Efficiency at Maximum Power in a Parallel Connected Two Quantum Dots Heat Engine","volume":"2023","author":"Birhanu","year":"2023","journal-title":"J. Eng."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.physrep.2017.05.008","article-title":"Fundamental aspects of steady-state conversion of heat to work at the nanoscale","volume":"649","author":"Benenti","year":"2017","journal-title":"Phys. Rep."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"3015","DOI":"10.1021\/acs.accounts.8b00296","article-title":"Engineering with Biomolecular Motors","volume":"51","author":"Hess","year":"2018","journal-title":"Acc. Chem. Res."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"30901","DOI":"10.1051\/epjap\/2021200390","article-title":"Endo-irreversible thermo-mechanical Carnot engine with new concept of entropy production action coefficient","volume":"93","author":"Feidt","year":"2021","journal-title":"Eur. Phys. J. Appl. Phys."},{"key":"ref_14","unstructured":"Chambadal, P. (1957). Les Centrales Nucl\u00e9aires, Armand Colin. (In French)."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"514","DOI":"10.1115\/1.2906271","article-title":"Optimum heat power cycles for specified boundary conditions","volume":"113","author":"Ibrahim","year":"1991","journal-title":"J. Eng. Gas Turb. 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Entropy, 24.","DOI":"10.3390\/e24010084"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"414","DOI":"10.5840\/monist191222331","article-title":"Maupertuis and the principle of least action","volume":"22","author":"Jourdain","year":"1912","journal-title":"Monist"}],"container-title":["Entropy"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1099-4300\/26\/2\/125\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T13:52:10Z","timestamp":1760104330000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1099-4300\/26\/2\/125"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,1,31]]},"references-count":19,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2024,2]]}},"alternative-id":["e26020125"],"URL":"https:\/\/doi.org\/10.3390\/e26020125","relation":{},"ISSN":["1099-4300"],"issn-type":[{"type":"electronic","value":"1099-4300"}],"subject":[],"published":{"date-parts":[[2024,1,31]]}}}