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Environmental Earth Sciences

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01-12-2013 | Special Issue

Partial derivatives of thermodynamic state properties for dynamic simulation

Authors: Matthis Thorade, Ali Saadat

Published in: Environmental Earth Sciences | Issue 8/2013

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Abstract

The thermodynamic behaviour of fluids can be accurately described by equations of state (EoS) in terms of the Helmholtz energy, with temperature and density as independent variables. The known properties in dynamic simulations of power or refrigeration cycles are usually different from temperature and density. Partial derivatives of state properties with respect to the known properties of the simulation have to be transformed into partial derivatives with respect to the independent variables of the EoS. This transformation is demonstrated step by step for the single-phase region, along the saturation line and within the two-phase region.

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Title: Partial derivatives of thermodynamic state properties for dynamic simulation
Authors: Matthis Thorade
Ali Saadat
Publication date: 01-12-2013
Publisher: Springer Berlin Heidelberg
Published in: Environmental Earth Sciences / Issue 8/2013
Print ISSN: 1866-6280
Electronic ISSN: 1866-6299
DOI: https://doi.org/10.1007/s12665-013-2394-z

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