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Applications du concept d'Exergie à l'énergétique de l'atmosphère. Les notions d'enthalpies utilisables sèche et humide.

Abstract : The available energy of a system is that sub-part of the total energy which could become available to provide a useful work. The available energy is also known in general thermodynamics as the "Exergy" of the system, the name Exergy meaning "extractable work" (Rant, 1956). Another concept of available energy has been developed in Meteorology, first by Margules (1903) and Lorenz (1955), then by Dutton (1973) and Pearce (1978). The aim of the thesis is to study the local properties of the "available enthalpy", one of the form of the thermodynamical Exergy. It is shown that the available enthalpy may generalize the approaches of Dutton and Pearce for the case of an atmosphere in hydrostatic equilibrium. The available enthalpy appears to be a special case of the "pseudo-energy" defined by Shepherd (1993). It is shown that an available enthalpy cycle can be derived which is valid for any isobaric level (or layer) located within any limited area domain. The available enthalpy cycle is computed for a baroclinic wave simulated by a numerical model, with all the boundary terms included and with the well-known baroclinic and barotropic paths of energy still valid. A generalisation of the (dry air) available enthalpy is proposed in order to deal with the moist air, with all the change of phases of the water species taken into account.
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https://tel.archives-ouvertes.fr/tel-00572254
Contributor : Pascal Marquet <>
Submitted on : Tuesday, March 1, 2011 - 10:19:27 AM
Last modification on : Friday, April 5, 2019 - 8:14:20 PM
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Pascal Marquet. Applications du concept d'Exergie à l'énergétique de l'atmosphère. Les notions d'enthalpies utilisables sèche et humide.. Climatologie. Université Paul Sabatier - Toulouse III, 1994. Français. ⟨tel-00572254⟩

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