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The entropic potential concept: a new way to look at energy transfer operations

Citation Link: https://doi.org/10.15480/882.1410
Publikationstyp
Journal Article
Publikationsdatum
2014-04-14
Sprache
English
Author
Wenterodt, Tammo 
Herwig, Heinz 
Institut
Technische Thermodynamik M-21 
Thermofluiddynamik (M-21H) 
DOI
10.15480/882.1410
TORE-URI
http://tubdok.tub.tuhh.de/handle/11420/1413
Lizenz
https://creativecommons.org/licenses/by/3.0/
Enthalten in
Entropy 
Citation
Entropy 16 (4): 2071-2084 (2014)
Publisher DOI
10.3390/e16042071
Scopus ID
2-s2.0-84899155991
Publisher
Multidisciplinary Digital Publishing Institute
Energy transfer operations or processes are systematically analyzed with respect to the way they can be assessed. It turns out that the energy transfer should not only be characterized by the operation or process itself but that it should be seen in a wider context. This context is introduced as the entropic potential of the energy that is transferred. It takes into account the overall transfer from the energy in its initial and finite states, <em>i.e.</em>, starting as pure exergy when it is a primary energy, for example, and ending as pure anergy when it has become part of the internal energy of the ambient. With this concept an energy devaluation number can be defined which has several properties with a reasonable physical background. Two examples of different complexity of the process assessed are given and discussed with respect to the physical meaning of the new energy devaluation number.
Schlagworte
heat transfer
assessment
entropy
energy devaluation
power generation
second law analysis
roughness
DDC Class
620: Ingenieurwissenschaften
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