A conceptual framework and interpretation of emergy algebra
| Autor: | Enrico Benetto, Ligia Tiruta-Barna |
|---|---|
| Přispěvatelé: | Laboratoire d'Ingénierie des Systèmes Biologiques et des Procédés (LISBP), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Recherche Agronomique (INRA), Resource Ctr Environm Technol CRTE, Centre de Recherche Public Henri-Tudor [Luxembourg] (CRP Henri-Tudor), French national research fund (ANR), Public Research Centre Henri Tudor, Institut National de la Recherche Agronomique (INRA)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Emergy accounting period
Environmental Engineering THERMODYNAMIC METRICS 020209 energy [SDV]Life Sciences [q-bio] Emergy algebra 02 engineering and technology 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences Emergy SYSTEMS EXERGY 0202 electrical engineering electronic engineering information engineering Relative magnitude Practical implications 0105 earth and related environmental sciences Nature and Landscape Conservation Mathematics Observation time Network dynamics Environmental accounting System dynamics Algebra Conceptual framework ENERGY ANALYSIS Emergy as a function of exergy Dynamic modeling Emergy as a function of time |
| Zdroj: | Ecological Engineering Ecological Engineering, Elsevier, 2013, 53, pp.290-298. ⟨10.1016/j.ecoleng.2012.12.060⟩ Ecological Engineering, 2013, 53, pp.290-298. ⟨10.1016/j.ecoleng.2012.12.060⟩ |
| ISSN: | 0925-8574 1872-6992 |
| Popis: | The emergy concept and its use in environmental accounting know some conceptual barriers mainly due to the lack of a transparent formalism of the emergy algebra. in this work, the emergy algebra rules were demonstrated starting from their definition and using dynamic modeling applied to the case of a simple network of processes. It was found that the rule four (reunited co-products and loop calculation) has three different formulations depending on the relative magnitude of two characteristic time scales: the one of the network dynamics and the scale of observation (the integration time). The traditional form of the rule four, commonly adopted in the emergy literature, is valid only for an observation time much longer than the network characteristic time. These findings have important practical implications in emergy analysis regarding the appropriate choice of the integration time and of the calculation formula to be applied, as well as the identification of the independent emergy sources to be considered. Furthermore, because of the non-conservative formalism, an emergy result is only valid for the level of detail of the network used for its calculation. Therefore, it shall not be re-used in further calculations, for networks having different scales and levels of details, as it is too often the case in the emergy literature. (C) 2012 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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