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On the concept of exergy and available potential energy

✍ Scribed by Fred Kucharski

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
875 KB
Volume
123
Category
Article
ISSN
0035-9009

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✦ Synopsis

Abstract

A systematic derivation of the concepts of available potential energy of Lorenz and Van Mieghem from an extended concept of exergy is performed. This procedure leads to an extension of Van Mieghem's global theory to a local formulation which can be used in limited‐area models. In the limit of small amplitude motion it is shown that the extended exergy reduces to the available potential energy of Boussinesq‐approximated models. Moreover, Shepherd's concept of pseudoenergy is extended in order to deal with diabatic and irreversible processes.

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The prrmary objectives of thus paper are (I) To present an available energy balance reflecting the Second Law of Thermodynanncs to complement the macroscopm balances of BIRD which are dictated by conservation of mass, the laws of motion and the First Law of Thermodynamres (II) To develop an equatron