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Exergy, An International Journal最新文献

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On exergy and sustainable development—Part 1: Conditions and concepts 火用与可持续发展——第一部分：条件与概念
Exergy, An International Journal Pub Date : 2001-01-01 DOI: 10.1016/S1164-0235(01)00020-6
Göran Wall , Mei Gong
{"title":"On exergy and sustainable development—Part 1: Conditions and concepts","authors":"Göran Wall , Mei Gong","doi":"10.1016/S1164-0235(01)00020-6","DOIUrl":"https://doi.org/10.1016/S1164-0235(01)00020-6","url":null,"abstract":"","PeriodicalId":100518,"journal":{"name":"Exergy, An International Journal","volume":"1 3","pages":"128-145"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1164-0235(01)00020-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72276745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 245
Cryogenic turbine efficiencies 低温涡轮效率
Exergy, An International Journal Pub Date : 2001-01-01 DOI: 10.1016/S1164-0235(01)00026-7
Mehmet Kanoğlu
{"title":"Cryogenic turbine efficiencies","authors":"Mehmet Kanoğlu","doi":"10.1016/S1164-0235(01)00026-7","DOIUrl":"10.1016/S1164-0235(01)00026-7","url":null,"abstract":"<div><p>Certain thermodynamic aspects of cryogenic turbines are investigated based on operational data provided by a cryogenic test facility. The cryogenic turbine is intended to produce power by replacing the throttling valve used in natural gas liquefaction plants. The turbine operates at very low temperatures; it admits liquefied natural gas (LNG) at a high pressure and discharges it at a low pressure. The temperature change of LNG in the expansion process through the cryogenic turbine is studied and compared with the temperature change through the throttling valve. It is found that the temperature will be about 2<!--> <sup>∘</sup>C smaller at the turbine exit than that at the throttling valve exit for the same inlet state and exit pressure. To establish a suitable model for the assessment of cryogenic turbine performance, the isentropic efficiency, the hydraulic efficiency, and the exergetic efficiency are studied and compared. The hydraulic efficiency is determined to be the only feasible method to assess the performance of cryogenic turbines.</p></div>","PeriodicalId":100518,"journal":{"name":"Exergy, An International Journal","volume":"1 3","pages":"Pages 202-208"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1164-0235(01)00026-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79357120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 47
Comparing hydraulic and polytropic efficiencies with exergy efficiency 水力和多变效率与火用效率的比较
Exergy, An International Journal Pub Date : 2001-01-01 DOI: 10.1016/S1164-0235(01)00025-5
Giacomo Bisio, Giuseppe Rubatto
{"title":"Comparing hydraulic and polytropic efficiencies with exergy efficiency","authors":"Giacomo Bisio,&nbsp;Giuseppe Rubatto","doi":"10.1016/S1164-0235(01)00025-5","DOIUrl":"https://doi.org/10.1016/S1164-0235(01)00025-5","url":null,"abstract":"","PeriodicalId":100518,"journal":{"name":"Exergy, An International Journal","volume":"1 3","pages":"193-201"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1164-0235(01)00025-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72276716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Exergy analysis for a Braysson cycle 布雷松循环的能量分析
Exergy, An International Journal Pub Date : 2001-01-01 DOI: 10.1016/S1164-0235(01)00008-5
Junlin Zheng , Fengrui Sun , Lingen Chen , Chih Wu
{"title":"Exergy analysis for a Braysson cycle","authors":"Junlin Zheng ,&nbsp;Fengrui Sun ,&nbsp;Lingen Chen ,&nbsp;Chih Wu","doi":"10.1016/S1164-0235(01)00008-5","DOIUrl":"10.1016/S1164-0235(01)00008-5","url":null,"abstract":"<div><p>An exergy analysis has been carried out for an irreversible Braysson cycle. The analytical formulae of power output and exergy efficiency are derived. The influences of various parameters on the exergy performance are analyzed by numerical calculation, and the results obtained have been compared with those of Brayton cycle under the same conditions. It is shown that the exergy loss in the combustion is the largest in the Braysson cycle, and both specific work and exergy efficiency of the cycle are larger than those of Brayton cycle.</p></div>","PeriodicalId":100518,"journal":{"name":"Exergy, An International Journal","volume":"1 1","pages":"Pages 41-45"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1164-0235(01)00008-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86000378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 33
A design method of flat-plate solar collectors based on minimum entropy generation 基于最小熵产生的平板太阳能集热器设计方法
Exergy, An International Journal Pub Date : 2001-01-01 DOI: 10.1016/S1164-0235(01)00009-7
E Torres-Reyes , J.G Cervantes-de Gortari , B.A Ibarra-Salazar , M Picon-Nuñez
{"title":"A design method of flat-plate solar collectors based on minimum entropy generation","authors":"E Torres-Reyes ,&nbsp;J.G Cervantes-de Gortari ,&nbsp;B.A Ibarra-Salazar ,&nbsp;M Picon-Nuñez","doi":"10.1016/S1164-0235(01)00009-7","DOIUrl":"10.1016/S1164-0235(01)00009-7","url":null,"abstract":"<div><p>A procedure to establish the optimal performance parameters for the minimum entropy generation during the collection of solar energy, is presented. The Entropy Generation Number, <em>N</em><sub>s</sub>, and the criterion for the optimal thermodynamic operation of a collector under nonisothermally, finite-time conditions, are reviewed. The Mass Flow Number, <em>M</em>, corresponding to the optimum flow of working fluid as a function of the solar collection area, is also considered. A general method for the preliminary solar collector design, based on <em>N</em><sub>s</sub>, <em>M</em> and the “Sun–Air” or stagnation temperature, is developed. This last concept is defined as the maximum temperature that the collector reaches at nonflow conditions for given geographic location, geometry and construction materials. The thermodynamic optimization procedure was used to determine the optimal performance parameters of an experimental solar collector.</p></div>","PeriodicalId":100518,"journal":{"name":"Exergy, An International Journal","volume":"1 1","pages":"Pages 46-52"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1164-0235(01)00009-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91330413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 71
Exergy and industrial ecology—Part 1: An exergy-based definition of consumption and a thermodynamic interpretation of ecosystem evolution 火用与工业生态学——第1部分：基于火用的消耗定义和生态系统进化的热力学解释
Exergy, An International Journal Pub Date : 2001-01-01 DOI: 10.1016/S1164-0235(01)00021-8
Lloyd Connelly , Catherine P Koshland
{"title":"Exergy and industrial ecology—Part 1: An exergy-based definition of consumption and a thermodynamic interpretation of ecosystem evolution","authors":"Lloyd Connelly ,&nbsp;Catherine P Koshland","doi":"10.1016/S1164-0235(01)00021-8","DOIUrl":"https://doi.org/10.1016/S1164-0235(01)00021-8","url":null,"abstract":"","PeriodicalId":100518,"journal":{"name":"Exergy, An International Journal","volume":"1 3","pages":"146-165"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1164-0235(01)00021-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72276744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 87
Thermodynamic analysis of energy intensive systems based on exergy–topological models 基于火用拓扑模型的能源密集型系统热力学分析
Exergy, An International Journal Pub Date : 2001-01-01 DOI: 10.1016/S1164-0235(01)00023-1
V Nikulshin , C Wu
{"title":"Thermodynamic analysis of energy intensive systems based on exergy–topological models","authors":"V Nikulshin ,&nbsp;C Wu","doi":"10.1016/S1164-0235(01)00023-1","DOIUrl":"https://doi.org/10.1016/S1164-0235(01)00023-1","url":null,"abstract":"","PeriodicalId":100518,"journal":{"name":"Exergy, An International Journal","volume":"1 3","pages":"173-179"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1164-0235(01)00023-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72276746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
Thermodynamic framework for work-assisted unit operations 工作辅助单元操作的热力学框架
Exergy, An International Journal Pub Date : 2001-01-01 DOI: 10.1016/S1164-0235(01)00022-X
Stanislaw Sieniutycz, Zbigniew Szwast
{"title":"Thermodynamic framework for work-assisted unit operations","authors":"Stanislaw Sieniutycz,&nbsp;Zbigniew Szwast","doi":"10.1016/S1164-0235(01)00022-X","DOIUrl":"https://doi.org/10.1016/S1164-0235(01)00022-X","url":null,"abstract":"","PeriodicalId":100518,"journal":{"name":"Exergy, An International Journal","volume":"1 3","pages":"166-172"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1164-0235(01)00022-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72276747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Entropy analysis of concentric annuli with rotating outer cylinder 外筒旋转同心环空的熵分析
Exergy, An International Journal Pub Date : 2001-01-01 DOI: 10.1016/S1164-0235(01)00011-5
Bekir Sami Yilbas
{"title":"Entropy analysis of concentric annuli with rotating outer cylinder","authors":"Bekir Sami Yilbas","doi":"10.1016/S1164-0235(01)00011-5","DOIUrl":"10.1016/S1164-0235(01)00011-5","url":null,"abstract":"<div><p>The effects of conduction and heat generation due to viscous dissipation in annuli is a topic of interest to researchers, since the applications include aerospace, food processing, electric machines, etc. In the present study, temperature rise and entropy generation in a cylindrical annuli due to conduction and viscous dissipation are considered. In the mathematical formulation, the flow developed in the annuli is assumed as laminar, since <em>Re</em> is selected as <span><math><mtext>≤50</mtext><mspace></mspace><mtext>000</mtext></math></span>. The wall temperature of the rotating cylinder is taken as higher than the wall temperature of the stationary inner cylinder. The temperature and entropy profiles are predicted for different Brinkman numbers and temperature difference across the annuli. It is found that as <em>Br</em> increases, the temperature in the fluid close to the rotating cylinder wall becomes higher than the wall temperature. This results in zero temperature gradient and the entropy generation reduces to zero in this region. The point of minimum entropy generation in the fluid moves away from the outer cylinder wall as <em>Br</em> increases. Moreover, the efficient operation and design of bearing systems can be possible with the analysis of entropy generation.</p></div>","PeriodicalId":100518,"journal":{"name":"Exergy, An International Journal","volume":"1 1","pages":"Pages 60-66"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1164-0235(01)00011-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72686696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 44
On exergy and sustainable development—Part 2: Indicators and methods 论能源与可持续发展——第二部分:指标与方法
Exergy, An International Journal Pub Date : 2001-01-01 DOI: 10.1016/S1164-0235(01)00030-9
Mei Gong , Göran Wall
{"title":"On exergy and sustainable development—Part 2: Indicators and methods","authors":"Mei Gong ,&nbsp;Göran Wall","doi":"10.1016/S1164-0235(01)00030-9","DOIUrl":"10.1016/S1164-0235(01)00030-9","url":null,"abstract":"<div><p>This second part is the continuation of Wall and Gong [Exergy Internat. J. 1 (3) (2001), in press]. This part is an overview of a number of different methods based on concepts presented in the first part and applies these to real systems. A number of ecological indicators will be presented and the concept of sustainable development will be further clarified. The method of Life Cycle Exergy Analysis will be presented. Exergy will be applied to emissions into the environment by case studies in order to describe and evaluate its values and limitation as an ecological indicator. Exergy is concluded to be a suitable ecological indicator and future research in this area is strongly recommended.</p></div>","PeriodicalId":100518,"journal":{"name":"Exergy, An International Journal","volume":"1 4","pages":"Pages 217-233"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1164-0235(01)00030-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73757349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 204
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