Methodologies to mitigate attenuating effects in flare gas flow measurement by ultrasonic technology at low pressure and high carbon dioxide concentration

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dc.contributor.advisor1Ramos, Rogerio
dc.contributor.advisor1IDhttps://orcid.org/0000000344932435
dc.contributor.advisor1Latteshttp://lattes.cnpq.br/2975022316691139
dc.contributor.authorFranco, Ligia Gaigher
dc.contributor.authorIDhttps://orcid.org/0000-0001-5767-6237
dc.contributor.authorLatteshttp://lattes.cnpq.br/2781323110176536
dc.contributor.referee1Martins, Marcio Ferreira
dc.contributor.referee1IDhttps://orcid.org/000000023023222X
dc.contributor.referee1Latteshttp://lattes.cnpq.br/7325983059020104
dc.contributor.referee2Rodriguez, Oscar Mauricio Hernandez
dc.contributor.referee2IDhttps://orcid.org/0000-0003-1578-7996
dc.contributor.referee2Latteshttp://lattes.cnpq.br/7735107032972317
dc.contributor.referee3Mattos, Márcio Coelho de
dc.contributor.referee3IDhttps://orcid.org/0000-0002-9243-5225
dc.contributor.referee3Latteshttp://lattes.cnpq.br/9150437340471561
dc.date.accessioned2024-05-30T00:49:29Z
dc.date.available2024-05-30T00:49:29Z
dc.date.issued2020-05-29
dc.description.abstractWorldwide, hydrocarbon flow measurement is governed by regulations. It is well known in literature that CO2 strongly attenuates wave generated by ultrasonic flow meters, which is the technology most used in flare gas application. In this context, this work proposes and tests methodologies to mitigate ultrasonic flow measurement failures due to signal attenuation in low pressure gas with high CO2 concentration. First, the flow meter is examined in zero-flow condition in order to isolate gas composition effect, establishing a reference state for further analysis. Although the meter didn’t fail, it is noticeable loss of signal power. Then, flow metering performance is evaluated in wind tunnel at several flow levels. For this purpose, a closed-circuit wind tunnel is projected. Due to hydrodynamic similarity, wind tunnel results can be extended to offshore flare gas flow, considering the same Reynolds number. The velocity profile in test section is validated using laser doppler velocimetry technique. Failure criteria are applied to detect and account failure in ultrasonic flow metering readings. With transducers in reference position, flow measurement fault begins in 70% of CO2 at Qmin = 2,500 Nm³/h and in 45% of CO2 at Qmax = 9,300 Nm³/h. Two methods are tested in order to mitigate CO2 attenuation: i) transducers approximation and ii) recovery angle. With transducers approximation, there are no permanent failures up to 100% of CO2. Recovery angle strategy increased CO2 limit without failure to 84% at Qmin = 2,500 Nm³/h and 54% at Qmax = 9,300 Nm³/h.
dc.description.resumo
dc.description.sponsorshipFundação Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.formatText
dc.identifier.urihttp://repositorio.ufes.br/handle/10/14741
dc.languagepor
dc.publisherUniversidade Federal do Espírito Santo
dc.publisher.countryBR
dc.publisher.courseMestrado em Engenharia Mecânica
dc.publisher.departmentCentro Tecnológico
dc.publisher.initialsUFES
dc.publisher.programPrograma de Pós-Graduação em Engenharia Mecânica
dc.rightsopen access
dc.subjectUltrasonic flow meter
dc.subjectFlow measurement
dc.subjectCarbon dioxide
dc.subject.br-rjbnsubject.br-rjbn
dc.subject.cnpqEngenharia Mecânica
dc.titleMethodologies to mitigate attenuating effects in flare gas flow measurement by ultrasonic technology at low pressure and high carbon dioxide concentration
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