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The Tenuous Use of Exergy as a Measure of Resource Value or Waste Impact

Author

Listed:
  • Kyrke Gaudreau

    () (Environment and Resource Studies, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada)

  • Roydon A. Fraser

    () (Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada)

  • Stephen Murphy

    () (Environment and Resource Studies, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada)

Abstract

Exergy is a thermodynamic concept that has been widely promoted for assessing and improving sustainability, notably in the characterization of resources and wastes. Despite having many notable benefits, exergy is often misused by authors who tend to apply it as an intrinsic characteristic of an object ( i.e. , as a static thermodynamic variable). Using both theoretical and empirical evidence the authors present five key limitations that must be overcome before exergy can be applied to characterize objects: (1) the incompatibility between exergy quality and resource quality ; (2) the inability of exergy to characterize non work-producing resources via the concentration exergy; (3) the constraints placed on the derivation of exergy; (4) problems with the exergy reference environment; and (5) the multiple perspectives applied to exergy analysis. Until the limitations are addressed, exergy should only be used for its original purpose as a decision making tool for engineering systems analysis.

Suggested Citation

  • Kyrke Gaudreau & Roydon A. Fraser & Stephen Murphy, 2009. "The Tenuous Use of Exergy as a Measure of Resource Value or Waste Impact," Sustainability, MDPI, Open Access Journal, vol. 1(4), pages 1-20, December.
  • Handle: RePEc:gam:jsusta:v:1:y:2009:i:4:p:1444-1463:d:6608
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    1. repec:eee:ecomod:v:228:y:2012:i:c:p:76-88 is not listed on IDEAS

    More about this item

    Keywords

    exergy; resource value; waste impact; sustainability assessment;

    JEL classification:

    • Q - Agricultural and Natural Resource Economics; Environmental and Ecological Economics
    • Q0 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - General
    • Q2 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Renewable Resources and Conservation
    • Q3 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Nonrenewable Resources and Conservation
    • Q5 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics
    • Q56 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Environment and Development; Environment and Trade; Sustainability; Environmental Accounts and Accounting; Environmental Equity; Population Growth
    • O13 - Economic Development, Innovation, Technological Change, and Growth - - Economic Development - - - Agriculture; Natural Resources; Environment; Other Primary Products

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