A consistent thermodynamic molecular model of n-hydrofluoroolefins and blends for refrigeration applications
Author
Llovell Ferret, Félix Lluís
Albà, Carlos G.
Vega, Lourdes F.
Other authors
Universitat Ramon Llull. IQS
Publication date
2020-05Alternative title
Modèle moléculaire thermodynamique cohérent des n-hydrofluoroléfines et de leurs mélanges pour des applications dans le domaine du froid
Abstract
This work presents a thermodynamic model that characterizes 4th-generation hydrofluoroolefins (HFOs)-based refrigerants with the molecular-based soft-SAFT equation of state (Blas and Vega, 1998) as well as its application in process simulations for a selected refrigeration application. The evaluation of the HFOs has been done building on a molecular model transferred from the equivalent hydrofluorocarbons (HFCs), taking advantage of the similarities between the two chemical families. The model has been used to calculate all thermophysical properties of the selected HFOs relevant for their application as refrigerants, including the saturated density, vapor pressure, heat capacity, speed of sound, surface tension and viscosity, providing good agreement with experimental available data. In addition, phase equilibria, interfacial behavior and viscosity calculations have been performed for blends between HFCs and the two most common HFOs, R1234yf and R1234ze(E). The obtained thermodynamic properties have been used for a process simulation of a vapor compression refrigeration system, comparing the 3rd generation refrigerant R410A with these 4th generation blends, including the Coefficient of Performance for different cases, in order to establish the best alternative to R410A. Overall, this work shows how molecular modeling tools can be used now a day, as a complementary tool to generate reliable data for process simulation, in this case related to the search for alternative refrigerants.
Document Type
Article
Accepted version
Language
English
Subject (CDU)
536 - Heat. Thermodynamics. Statistical physics
Keywords
Equilibri vapor-líquid
Tensió superficial
Viscositat
Hydrofluoroolefins
Soft-SAFT
Vapor–liquid equilibria
Surface tension
Viscosity
Coefficient of performance
Pages
37 p.
Publisher
Elsevier
Is part of
International Journal of Refrigeration. Vol.113 (2020), p.145-155
Grant agreement number
info:eu-repo/grantAgreement/SUR del DEC/SGR/2017-SGR-1016
info:eu-repo/grantAgreement/EC/Interreg Sudoe Programme/KET4F-Gas - SOE2/P1/P0823
info:eu-repo/grantAgreement/Khalifa University of Science and Technology/Project CIRA2018-121
This item appears in the following Collection(s)
Rights
© Elsevier.
Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by-nc-nd/4.0/