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Exergy: Its Potential and Limitations in Environmental Science and Technology

Environmental science & technology, 2008-04, Vol.42 (7), p.2221-2232 [Peer Reviewed Journal]

Copyright © 2008 American Chemical Society ;2008 INIST-CNRS ;Copyright American Chemical Society Apr 1, 2008 ;ISSN: 0013-936X ;EISSN: 1520-5851 ;DOI: 10.1021/es071719a ;PMID: 18504947 ;CODEN: ESTHAG

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  • Title:
    Exergy: Its Potential and Limitations in Environmental Science and Technology
  • Author: Dewulf, Jo ; Van Langenhove, Herman ; Muys, Bart ; Bruers, Stijn ; Bakshi, Bhavik R ; Grubb, Geoffrey F ; Paulus, D. M ; Sciubba, Enrico
  • Subjects: Analysis ; Applied sciences ; Ecology ; Economic analysis ; Ecosystems ; Environmental impact ; Environmental science ; Exact sciences and technology ; Pollution ; Thermodynamics
  • Is Part Of: Environmental science & technology, 2008-04, Vol.42 (7), p.2221-2232
  • Description: New technologies, either renewables-based or not, are confronted with both economic and technical constraints. Their development takes advantage of considering the basic laws of economics and thermodynamics. With respect to the latter, the exergy concept pops up. Although its fundamentals, that is, the Second Law of Thermodynamics, were already established in the 1800s, it is only in the last years that the exergy concept has gained a more widespread interest in process analysis, typically employed to identify inefficiencies. However, exergy analysis today is implemented far beyond technical analysis; it is also employed in environmental, (thermo)economic, and even sustainability analysis of industrial systems. Because natural ecosystems are also subjected to the basic laws of thermodynamics, it is another subject of exergy analysis. After an introduction on the concept itself, this review focuses on the potential and limitations of the exergy concept in ecosystem analysis, utilized to describe maximum storage and maximum dissipation of energy flows ; industrial system analysis: from single process analysis to complete process chain analysis ; (thermo)economic analysis, with extended exergy accounting; and environmental impact assessment throughout the whole life cycle with quantification of the resource intake and emission effects. Apart from technical system analysis, it proves that exergy as a tool in environmental impact analysis may be the most mature field of application, particularly with respect to resource and efficiency accounting, one of the major challenges in the development of sustainable technology. Far less mature is the exergy analysis of natural ecosystems and the coupling with economic analysis, where a lively debate is presently going on about the actual merits of an exergy-based approach.
  • Publisher: Washington, DC: American Chemical Society
  • Language: English
  • Identifier: ISSN: 0013-936X
    EISSN: 1520-5851
    DOI: 10.1021/es071719a
    PMID: 18504947
    CODEN: ESTHAG
  • Source: MEDLINE
    Alma/SFX Local Collection
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