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Acoustic determination of thermophysical properties and critical parameters for R404A and critical line of x CO2+(1− x) R404A

2006Journal article Open access
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dc.contributor.authorEsperança, José M. S. S.
dc.contributor.authorPires, Pedro F.
dc.contributor.authorGuedes, Henrique J. R.
dc.contributor.authorRibeiro, Nuno
dc.contributor.authorCosta, Tânia
dc.contributor.authorAguiar-Ricardo, Ana
dc.date.accessioned2021-12-15T12:16:45Z
dc.date.available2021-12-15T12:16:45Z
dc.date.issued2006
dc.description.abstractThe thermophysical properties and critical parameters for the alternative refrigerant R404A (52 wt % of 1,1,1- trifluoroethane (R143a) + 44 wt % of pentafluoroethane (R125) + 4 wt % of 1,1,1,2-tetrafluoroethane (R134a)) were investigated using two different acoustic techniques. The critical behavior of the system xCO2 + (1 - x)R404A was also investigated. Experimental data of speed of sound in liquid R404A from 258 K to 338 K and pressures up to 65 MPa were measured using a pulse-echo method. Derived thermodynamic properties are calculated, combining our experimental data with density and isobaric heat capacity values published by other authors. Measurements of the critical temperature Tc and pressure pc on (R404A) and mixtures of xCO2 + (1 - x)R404A were performed using another simple ultrasonic time-delay technique. The binary critical line was determined over the whole composition range showing that this system deviates only slightly from ideality since the critical line is a continuous line. The Peng-Robinson equation of state with conventional mixing and combining rules was used to correlate the binary experimental data.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationEsperança, J. M., Pires, P. F., Guedes, H. J., Ribeiro, N., Costa, T., & Aguiar-Ricardo, A. (2006). Acoustic determination of thermophysical properties and critical parameters for R404A and critical line of x CO2+(1− x) R404A. Journal of Chemical & Engineering Data, 51(3), 1148-1155. https://doi.org/10.1021/je0600707pt_PT
dc.identifier.doi10.1021/je0600707pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/3912
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAmerican Chemical Societypt_PT
dc.relationPhase-behavior and microscopic characterisation of micro/macro-emulsions in CO2. New strategies for polymerisation and enzymatic catalysis.
dc.relationMEDIDAS ACÚSTICAS A ALTA PRESSÃO EM SISTEMAS HETEROGÉNEOS
dc.relationMEDIDAS DA VELOCIDADE DO SOM E DA DENSIDADE EM HIDROCARBONETOS E MISTURAS DE HIDROCARBONETOS LÍQUIDOS. PROPRIEDADES TERMODINÂMICAS DERIVADAS
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectR404Apt_PT
dc.subjectxCO2 + (1 - x)R404Apt_PT
dc.subjectAcoustic determinationpt_PT
dc.subjectThermophysical propertiespt_PT
dc.subjectCritical parameterspt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências Exatas e da Engenhariapt_PT
dc.titleAcoustic determination of thermophysical properties and critical parameters for R404A and critical line of x CO2+(1− x) R404Apt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitlePhase-behavior and microscopic characterisation of micro/macro-emulsions in CO2. New strategies for polymerisation and enzymatic catalysis.
oaire.awardTitleMEDIDAS ACÚSTICAS A ALTA PRESSÃO EM SISTEMAS HETEROGÉNEOS
oaire.awardTitleMEDIDAS DA VELOCIDADE DO SOM E DA DENSIDADE EM HIDROCARBONETOS E MISTURAS DE HIDROCARBONETOS LÍQUIDOS. PROPRIEDADES TERMODINÂMICAS DERIVADAS
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POCI/POCTI%2FQUI%2F35429%2F2000/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POCTI/PRAXIS XXI%2FBD%2F16081%2F98/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POCTI/PRAXIS XXI%2FBD%2F19836%2F99/PT
oaire.citation.endPage1155pt_PT
oaire.citation.issue3pt_PT
oaire.citation.startPage1148pt_PT
oaire.citation.titleJournal of Chemical & Engineering Datapt_PT
oaire.citation.volume51pt_PT
oaire.fundingStreamPOCI
oaire.fundingStreamPOCTI
oaire.fundingStreamPOCTI
person.familyNameDuarte Louzeiro Pires
person.givenNamePedro Filipe
person.identifierC-3387-2012
person.identifier.ciencia-idD413-1517-1263
person.identifier.orcid0000-0001-8583-7990
person.identifier.scopus-author-id7003655474
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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