Overview
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ABSTRACT
As many industrial processes operate under pressure, information concerning the thermodynamics of equilibria between phases under pressure is essential in energetic engineering. Many models have been offered for the true representation of thermodynamic properties. New thermodynamic models, which have an even greater level of precision and which are based on molecular concept are in progress. These models, more predictive, will help reduce the number of experimental data to determine. They will allow for the dimensioning of thermodynamic systems and the improvement of the understanding of the physical phenomena involved.
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Read the articleAUTHORS
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Salaheddine CHABAB: Doctorate from PSL University - Research Engineer, Mines ParisTech
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Patrice PARICAUD: Professor of Thermodynamics and Process Engineering - Doctorate from Imperial College London - Engineer from ENSIC Nancy Chemistry and Process Unit (UCP), ENSTA Paris, Paris Polytechnic Institute, Palaiseau
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Christophe COQUELET: Professor, Mines ParisTech, PSL University - Doctorate from the École des Mines de Paris - University Professor - Alumnus of ENS Cachan - ENSIACET engineer
INTRODUCTION
Information concerning the thermodynamics of equilibria between phases under pressure is essential in chemical and energy engineering. Indeed, many industrial processes and energy systems operate under pressure: separation processes (distillation, supercritical fluid extraction, etc.), geochemical processes (underground gas and energy storage), natural gas treatment, refrigeration and heat pumps, engines, ORC cycles and waste heat recovery, etc. To date, many models have been proposed (pure bodies and mixtures) for the faithful representation of thermodynamic properties, taking into account the behavior of the various systems commonly encountered in the industrial field. However, thanks to the precise information provided by laboratory experiments, new, even more accurate thermodynamic models can be developed. These models are used to reduce the number of experimental points to be determined (predictive models) and to size units or unit operations, as well as to improve understanding of the physical phenomena involved. Process energy assessment also requires highly accurate thermodynamic models, enabling energy, entropy and exergy balances to be calculated and evaluated. When calculating the coefficient of performance of a refrigeration cycle, for example, it is not sufficient to use thermodynamic models whose density calculation uncertainty is too great. Similarly, the use of the perfect gas is very limited.
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The Ultimate Scientific and Technical Reference
KEYWORDS
equation of state | SAFT equation | virial equation | cubic equation
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Physics of energy
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Determining the thermodynamic properties of fluids
Bibliography
Bibliography
Organizations
Mines ParisTech, PSL Université, CTP – Centre thermodynamique des procédés 38, rue Saint honoré, 77305 Fontainebleau Cedex Tel: (33)164694962 Fax: (33)164694968
ENSTA Paris, IP Paris UCP – Unité chimie et procédés 828, boulevard des Maréchaux, 91762 PALAISEAU Cedex Tel: (33) 181872026
INREAE, Génie des procédés frigorifiques pour la sécurité alimentaire et l'environnement...
Theses
CAMPESTRINI (M.) – Thermodynamic study of solid-liquid-vapor equilibria: application to cryogenics and air separation units. École des Mines de Paris thesis, 432 p. (2014).
CHAPOY (A.) – Study of the equilibria of water-hydrocarbon-acid gas systems in the context of gas production. Thesis, École des Mines de Paris, 250 p. (2004).
COQUELET (C.) – Étude des fluides frigorigènes,...
Websites
DIPPR : Design Institute for Physical Properties https://www.aiche.org
NIST: National Institute of Standard Technology https://www.nist.gov
DECHEMA: Gesellschaft für Chemiske Technik und Biotechnologie eV
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