Thermodynamic Models for Predicting R-134a and R-1234yf Superheated Vapor Specific Entropies and Enthalpies for Evaluating Vehicle Air Conditioning

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dc.contributor.authordo Saviani L.F.N.
dc.contributor.authorde Moraes Gomes Rosa M.T.
dc.contributor.authorTvrzska de Gouvea M.
dc.date.accessioned2024-10-01T06:12:26Z
dc.date.available2024-10-01T06:12:26Z
dc.date.issued2024
dc.description.abstract© The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.There is an urgent need to replace refrigerant fluids in use with new ones that have a lower global warming potential. In vehicle air conditioning systems, R-134a is mostly used, which despite not degrading the ozone layer, has a high global warming potential. R-1234yf is regarded as a strong candidate for replacing R-134a. However, a loss in the coefficient of performance is usually associated with this replacement. Process simulation is a powerful tool to assist in proposing alternative designs or operating points. However, proper thermodynamic models are needed to generate accurate simulation results. In this work, thermodynamic models are presented for the prediction of the specific enthalpies and entropies of the superheated vapor of R-134a and R-1234yf fluids. The postulated models show an excellent capacity for reproducing tabulated properties from the literature with prediction errors of less than 2%. They were further applied to simulate a typical vapor compression system operating with both refrigerant fluids. A loss in the coefficient of performance of up to 15% can be observed when replacing R-134a with R-1234yf and by simulating different operating scenarios an operating point having a loss of 5% in performance can be found.
dc.description.firstpage398
dc.description.lastpage405
dc.description.volume402 SIST
dc.identifier.doi10.1007/978-3-031-66961-3_36
dc.identifier.issnNone
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/39494
dc.relation.ispartofSmart Innovation, Systems and Technologies
dc.rightsAcesso Restrito
dc.subject.otherlanguageAir conditioning
dc.subject.otherlanguageR-1234yf
dc.subject.otherlanguagethermodynamic models
dc.titleThermodynamic Models for Predicting R-134a and R-1234yf Superheated Vapor Specific Entropies and Enthalpies for Evaluating Vehicle Air Conditioning
dc.typeArtigo de evento
local.scopus.citations0
local.scopus.eid2-s2.0-85202642442
local.scopus.subjectCoefficient of Performance
local.scopus.subjectEntropy and enthalpies
local.scopus.subjectGlobal warming potential
local.scopus.subjectOperating points
local.scopus.subjectR-1234yf
local.scopus.subjectRefrigerant fluids
local.scopus.subjectSpecific enthalpy
local.scopus.subjectSpecific entropy
local.scopus.subjectSuperheated vapor
local.scopus.subjectThermodynamic modelling
local.scopus.updated2025-04-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85202642442&origin=inward
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