Gas Pumping
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Sistema especialista fuzzy para dimensionamento de bombeio mecânico
Despite the emergence of other forms of artificial lift, sucker rod pumping systems remains hegemonic because of its flexibility of operation and lower investment cost compared to other lifting techniques developed. A successful rod pumping sizing necessarily passes through the supply of estimated flow and the controlled wear of pumping equipment used in the
Publicado em: 2010
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2. Sistemas de análises químicas em fluxo explorando multi-impulsão, interface única ou quimiometria / Flow systems exploiting multi-pumping, single interface or chemometry
Multi-pumping flow systems (MPFS) present as an unique feature the use of solenoid pumps as fluid propelling devices, which deliver pulsed flows. This flow regime was evaluated in order to improve mixing conditions between the involved solutions, heating transfer and gas diffusion.The association of the chemometric methods of analysis and MPFS systems was de
Publicado em: 2009
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3. Impulse control with liquid level limits and minimization of actuations / Controle impulsional limitação da variação de nivel com minimização das atuações
Os elevados custos de produção na extração de petróleo marítimo são reduzidos com um sistema inovador que a Petrobras está desenvolvendo, denominado VASPS (do inglês, Vertical Annular Separation and Pumping System), capaz de separar gás e líquido ainda no assoalho oceânico. Esta dissertação trata do ajuste do nível de l´iquido no reservatóri
Publicado em: 2009
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4. Coarse particle suspension in mechanical flotation cells. / Suspensão de partículas grossas em células mecânicas de flotação.
Several attempts to correlate particle size and flotation response at the biggest Brazilian plants (iron ore and phosphate) have concluded that coarse particles (dp 100m) do not float efficiently. As solids suspension is a necessary precondition for particle collection, the study of coarse particle suspension in mechanical cells is fully justified and it is
Publicado em: 2009
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5. ANÁLISE DA APLICAÇÃO DE UM SISTEMA DE BOMBEAMENTO MULTIFÁSICO SUBMARINO NA PRODUÇÃO DE PETRÓLEO / EVALUATION OF A SUBSEA MULTIPHASE PUMPING SYSTEM APPLIED ON PETROLEUM PRODUCTION
A subsea oil production system allows simultaneous production of several wells with different flow rates when the system has a subsea manifold. In order to balance the different flow rates, the higher production wells have their flow rates reduced via a choking system. As a result, the total flow is lower than the summmation of all individual well flow rates
Publicado em: 2003
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6. Isolation and Sequence of Tryptic Peptides from the Proton-Pumping ATPase of the Oat Plasma Membrane 1
In crude extracts of plant tissue, the Mr = 100,000 proton-pumping ATPase constitutes less than 0.01% of the total cell protein. A large-scale purification procedure is described that has been used to obtain extensive protein sequence information from this enzyme. Plasma membrane vesicles enriched in ATPase activity were obtained from extracts of oat roots b
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7. Nonlinear natural engine: Model for thermodynamic processes in mesoscale systems
To develop intuition on the possible application of concepts from thermodynamic heat engines to mesoscale systems, we have constructed and studied a model thermoacoustic heat engine. The model consists of a chain of coupled nonlinear acoustic vibrators in which the primary thermodynamic medium is argon gas, the secondary thermodynamic medium is constituted b
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8. Diacylglycerols induce both ion pumping in patch-clamped guard-cell protoplasts and opening of intact stomata.
Stomatal guard cells in leaves regulate the apertures of microscopic pores through which photosynthetic gas exchange and water vapor loss occur. Environmental signals, including light, high humidity, and low CO2 concentrations, open stomata by increasing the volume of guard cells. Activation of a plasma membrane H+ pump initiates K+ and Cl- influx, accompani
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9. The electroosmotic droplet switch: Countering capillarity with electrokinetics
Electroosmosis, originating in the double-layer of a small liquid-filled pore (size R) and driven by a voltage V, is shown to be effective in pumping against the capillary pressure of a larger liquid droplet (size B) provided the dimensionless parameter σR2/ε|ζ|VB is small enough. Here σ is surface tension of the droplet liquid/gas interface, ε is the l
National Academy of Sciences.