Análise comparativa de medidor de vazão em flare por tecnologia ótica e pitometria utilizando túnel de vento
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Data
2012-07-25
Autores
Silva, Felipe Carvalho da
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Universidade Federal do Espírito Santo
Resumo
With recent discoveries by the oil industry related to the reserves in Brazilian pre-salt, flow measurement technology is being re-evaluated in view of the large CO2 concentrations found in these reserves. A technology that has accuracy levels similar to those obtained with flow meters currently used and also measures independent characteristics to the composition and thermodynamic properties of gases is optical flow measurement velocimetry (OFM). The present work is related to experimental study, comparison of the speed readings from Pitot tube flow meters and optical velocimetry. This experimental study consists of qualifying and quantifying the velocity profiles among the possible configurations of flow in the wind tunnel, proposing methodology using flow conditioners and damping of the readings obtained with the Pitot tube, and analysis of readings taken with the optical sensor to evaluate the device installation effects in the results. The results indicate that transit-time optical flow meters for medium to high speed levels, could provide readcohesive flow even in a misalignment of up to ± 5 °, although it appears in the installation manual of the manufacturer guarantees of results meter when a misalignment of at most up to ±2º. Regarding the optical sensor intrusive effect in the readings simultaneous with the Pitot tube, it is perceived, in general, from approximately Re> 2,05x105, the intrusive effect of this influence is suppressed by other effects. Finally, for a proper flow study through Pitometry in order to make the comparison with the optical flow metering and achieve satisfactory results with the Pitot tube, the use of specific devices of flow conditioning and damping of the measured values had to be made
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Palavras-chave
Flow meters , Pitot tubes , Optical detectors , Laser Doppler Speedometer , Pre-salt
Citação
SILVA, Felipe Carvalho da. Análise comparativa de medidor de vazão em flare por tecnologia ótica e pitometria utilizando túnel de vento. 2012. 154 f. Dissertação (Mestrado em Engenharia Mecânica) - Universidade Federal do Espírito Santo, Centro Tecnológico, Vitória, 2012.