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  2. Instrumentation in petrochemical industries - Wikipedia

    en.wikipedia.org/wiki/Instrumentation_in...

    Pressure in blanketed tanks is maintained by self actuating pressure control valves (PCVs). As liquid is withdrawn from the tank the pressure in the gas space falls. The blanket gas supply valve opens to maintain the pressure. As the tank fills with liquid the pressure rises and a vent gas valve open to vent gas to atmosphere or a vent system. [11]

  3. Bühlmann decompression algorithm - Wikipedia

    en.wikipedia.org/wiki/Bühlmann_decompression...

    The Bühlmann decompression model is a neo-Haldanian model which uses Haldane's or Schreiner's formula for inert gas uptake, a linear expression for tolerated inert gas pressure coupled with a simple parameterised expression for alveolar inert gas pressure and expressions for combining Nitrogen and Helium parameters to model the way inert gases enter and leave the human body as the ambient ...

  4. Compressor map - Wikipedia

    en.wikipedia.org/wiki/Compressor_map

    It is a no-load condition in a gas turbine, turbocharger or industrial axial compressor but overload in an industrial centrifugal compressor. [29] Hiereth et al. [30] shows a turbocharger compressor full-load, or maximum fuelling, curve runs up close to the surge line. A gas turbine compressor full-load line also runs close to the surge line.

  5. Dimensionless numbers in fluid mechanics - Wikipedia

    en.wikipedia.org/wiki/Dimensionless_numbers_in...

    Dimensionless numbers (or characteristic numbers) have an important role in analyzing the behavior of fluids and their flow as well as in other transport phenomena. [1] They include the Reynolds and the Mach numbers, which describe as ratios the relative magnitude of fluid and physical system characteristics, such as density, viscosity, speed of sound, and flow speed.

  6. Compressor characteristic - Wikipedia

    en.wikipedia.org/wiki/Compressor_characteristic

    Due to flow reversal, pressure in the pipe falls and the compressor regains its normal stable operation (let at point B) delivering the gas at higher flow rate (˙). But the control valve still corresponds to the flow rate ˙. Due to this compressor's operating conditions will again return to D through points C and S.

  7. Instrumentation and control engineering - Wikipedia

    en.wikipedia.org/wiki/Instrumentation_and...

    Instrumentation and control engineering is a vital field of study offered at many universities worldwide at both the graduate and postgraduate levels. This discipline integrates principles from various branches of engineering, providing a comprehensive understanding of the design, analysis, and management of automated systems.

  8. Non ideal compressible fluid dynamics - Wikipedia

    en.wikipedia.org/wiki/Non_ideal_compressible...

    The non-ideal gas region (< <) is shown close to the saturation curve. For fluids with high molecular complexity, state-of-the-art thermodynamic models predict values of 0 < Γ < 1 {\displaystyle 0<\Gamma <1} in the single-phase region close to the saturation curve, where the speed of sound is largely sensitive to density variations along ...

  9. Decompression theory - Wikipedia

    en.wikipedia.org/wiki/Decompression_theory

    Most Haldanean tables since the mid 20th century, including the Bühlmann tables, are based on the critical difference assumption . [73] The M-value is the maximum value of absolute inert gas pressure that a tissue compartment can take at a given ambient pressure without presenting symptoms of decompression sickness. M-values are limits for the ...