Reconsideration of Criteria and Modeling in Order to Optimize the Efficiency of Irreversible Thermomechanical Heat Engines
The purpose of this work is to precise and complete one recently proposed in the literature and relative to a general criterion to maximize the first law efficiency of irreversible heat engines. It is shown that the previous proposal seems to be a particular case. A new proposal has been developed f...
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| Format: | Article |
| Language: | English |
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MDPI AG
2010-12-01
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| Series: | Entropy |
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| Online Access: | http://www.mdpi.com/1099-4300/12/12/2470/ |
| _version_ | 1798037702856146944 |
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| author | Michel Feidt |
| author_facet | Michel Feidt |
| author_sort | Michel Feidt |
| collection | DOAJ |
| description | The purpose of this work is to precise and complete one recently proposed in the literature and relative to a general criterion to maximize the first law efficiency of irreversible heat engines. It is shown that the previous proposal seems to be a particular case. A new proposal has been developed for a Carnot irreversible thermomechanical heat engine at steady state associated to two infinite heat reservoirs (hot source, and cold sink): this constitutes the studied system. The presence of heat leak is accounted for, with the most simple form, as is done generally in the literature. Irreversibility is modeled through , created internal entropy rate in the converter (engine), and , total created entropy rate in the system. Heat transfer laws are represented as general functions of temperatures. These concepts are particularized to the most common heat transfer law (linear one). Consequences of the proposal are examined; some new analytical results are proposed for efficiencies. |
| first_indexed | 2024-04-11T21:30:09Z |
| format | Article |
| id | doaj.art-3791c9d6947f45dd8f10631e68858502 |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-04-11T21:30:09Z |
| publishDate | 2010-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-3791c9d6947f45dd8f10631e688585022022-12-22T04:02:02ZengMDPI AGEntropy1099-43002010-12-0112122470248410.3390/e12122470Reconsideration of Criteria and Modeling in Order to Optimize the Efficiency of Irreversible Thermomechanical Heat EnginesMichel FeidtThe purpose of this work is to precise and complete one recently proposed in the literature and relative to a general criterion to maximize the first law efficiency of irreversible heat engines. It is shown that the previous proposal seems to be a particular case. A new proposal has been developed for a Carnot irreversible thermomechanical heat engine at steady state associated to two infinite heat reservoirs (hot source, and cold sink): this constitutes the studied system. The presence of heat leak is accounted for, with the most simple form, as is done generally in the literature. Irreversibility is modeled through , created internal entropy rate in the converter (engine), and , total created entropy rate in the system. Heat transfer laws are represented as general functions of temperatures. These concepts are particularized to the most common heat transfer law (linear one). Consequences of the proposal are examined; some new analytical results are proposed for efficiencies.http://www.mdpi.com/1099-4300/12/12/2470/modeloptimizationefficiencyirreversible thermomechanical heat enginessteady sate |
| spellingShingle | Michel Feidt Reconsideration of Criteria and Modeling in Order to Optimize the Efficiency of Irreversible Thermomechanical Heat Engines Entropy model optimization efficiency irreversible thermomechanical heat engines steady sate |
| title | Reconsideration of Criteria and Modeling in Order to Optimize the Efficiency of Irreversible Thermomechanical Heat Engines |
| title_full | Reconsideration of Criteria and Modeling in Order to Optimize the Efficiency of Irreversible Thermomechanical Heat Engines |
| title_fullStr | Reconsideration of Criteria and Modeling in Order to Optimize the Efficiency of Irreversible Thermomechanical Heat Engines |
| title_full_unstemmed | Reconsideration of Criteria and Modeling in Order to Optimize the Efficiency of Irreversible Thermomechanical Heat Engines |
| title_short | Reconsideration of Criteria and Modeling in Order to Optimize the Efficiency of Irreversible Thermomechanical Heat Engines |
| title_sort | reconsideration of criteria and modeling in order to optimize the efficiency of irreversible thermomechanical heat engines |
| topic | model optimization efficiency irreversible thermomechanical heat engines steady sate |
| url | http://www.mdpi.com/1099-4300/12/12/2470/ |
| work_keys_str_mv | AT michelfeidt reconsiderationofcriteriaandmodelinginordertooptimizetheefficiencyofirreversiblethermomechanicalheatengines |