A. Baldea

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Publications (3)0 Total impact

  • Conference Proceeding: Flooding process analysis by 13C cryogenic separation column
    C. Festila, C.I. Pop, E.H. Dulf, A. Baldea, M. Gligan
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    ABSTRACT: The applications of stable isotopes from different chemical elements are well-known. Based on specific properties, a great diversity of isotope concentration (separation) methods have been developed, one of them being the cryogenic separation for (<sup>13</sup>C). After a short description of the separation equipment (separation column), the authors deal with the arising of the flooding process. Based on simplified equations, the evolution of an intended flooding is studied, divided in more stages: normal mode of operation, pre-flooding, ldquodischargerdquo period, flooding period and flooding damping. The next step of study will analyze the possibilities to avoid the flooding process.
    Automation, Quality and Testing, Robotics, 2008. AQTR 2008. IEEE International Conference on; 06/2008
  • Conference Proceeding: About the Cryogenic Distillation Control for (13C) Isotope Separation
    C. Festila, A. Baldea, M. Gligan, M. Abrudean
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    ABSTRACT: The (<sup>13</sup>C) isotope separation process is a very important technical, scientific and industrial domain of activity. The operation plant is complex, with many input-output variables, difficult to model and to control. The authors identify the terminal and internal variable, define a dedicated structural model and conceive a complex control system, able to maintain the separation process at the desired parameters. Also, some descriptions about the dedicated transducers are given
    Automation, Quality and Testing, Robotics, 2006 IEEE International Conference on; 06/2006
  • Article: Level and pressure control in condenser of the 13C isotope separation column
    Cl. Festila, E. H. Dulf, A. Baldea
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    ABSTRACT: The process of the 13C in cryogenic separation column is an intricate one. A lot of parameters must be kept constant at empirical values. From among these, the nitrogen level and the temperature in condenser are essential for the separation process. In present, the liquid nitrogen level is controlled manually and any error of the operators can waste the final product. The paper proposes not only a system for liquid nitrogen level control, but also a second system able to decrease — due to the under-pressure — the evaporation temperature of liquid nitrogen in order to improve the separation process. The paper analyzes the two systems as independent entities and the interinfluences are treated as disturbances. The analysis in the true MIMO frame is a future task.
    International Conference on Automation, Quality and Testing, Robotics. 1:1-6.
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