Title: Influence of gravity on the exergy of substance

Authors: Richard Petela

Addresses: Technology Scientific Ltd., 152 Ranch Estates Dr. N.W., Calgary, Alberta T3G 1K4, Canada

Abstract: Due to buoyancy, the substance of the density different from that of the environment, presents the ability to work by lifting or sinking and, when achieving the density-equilibrium altitude, the physical, or even chemical, components of the substance exergy could change in results of the changed parameters of the local environments at the density equilibrium altitude. For a gaseous substance, proposed |mechanical| exergy component is introduced. Considered is an exemplary simple process of a throttling of atmospheric air followed by its isothermal compressing. The exergy balance for the process is compared to the results obtained by the traditional method.

Keywords: engineering thermodynamics; exergy theory; gravitational exergy component; gravity; exergy balance; atmospheric air; isothermal compressing.

DOI: 10.1504/IJEX.2008.016009

International Journal of Exergy, 2008 Vol.5 No.1, pp.1 - 17

Published online: 02 Dec 2007 *

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