Steam Turbines and Vacuum Systems
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Questions and Answers

Which of the following agents improve the thermal efficiency of an open cycle gas turbine?

  • Intercooling (correct)
  • Regeneration (correct)
  • Reheating (correct)
  • All of these (correct)
  • Compared to a steam power plant, a gas turbine power plant with the same capacity is

  • Larger
  • Not comparable
  • Smaller (correct)
  • The same size
  • Which of the following does not improve thermal efficiency of an open cycle gas turbine?

  • Regeneration
  • Reducing air intake (correct)
  • Intercooling
  • Reheating
  • Which of the following methods can be used in combination to improve thermal efficiency of gas turbines?

    <p>Reheating and intercooling</p> Signup and view all the answers

    Which is NOT a feature of a gas turbine power plant?

    <p>Larger in size compared to steam plant</p> Signup and view all the answers

    One advantage of a gas turbine power plant over a steam power plant is

    <p>Smaller size</p> Signup and view all the answers

    What effect does intercooling have on gas turbines?

    <p>Improves thermal efficiency</p> Signup and view all the answers

    Which process in a gas turbine power plant reduces compressor work?

    <p>Intercooling</p> Signup and view all the answers

    Which one of the following statements about gas turbine power plants is true?

    <p>They are smaller in size for the same capacity as steam plants.</p> Signup and view all the answers

    Which method is not employed to improve the thermal efficiency of an open cycle gas turbine?

    <p>Increasing fuel input</p> Signup and view all the answers

    Study Notes

    Condensing Turbines

    • Vacuum is obtained by a sudden drop in pressure and removal of non-condensable gases.

    Cross Compound Steam Turbines

    • Cross-compound steam turbines were once used in marine ships before the introduction of two-stroke diesel engines.

    Steam Reaching Turbine Blades

    • When steam reaches turbine blades, the type of force responsible for moving turbine blades is axial force.

    Centrifugal Compressors

    • Centrifugal compressors are used for higher pressure ratios and lower flow rates.
    • In gas transmission applications, centrifugal compressors with 3700 kW have a speed of around 14000 RPM.

    Steam Turbine Quiz

    Non-Condensing Steam Turbines

    • Non-condensing steam turbines are also called back-pressure steam turbines.

    Condensing Turbines

    • Condensing turbines are used for central power generation.

    Classification of Steam Turbines

    • Steam turbines are classified based on the type of blades, exhausting condition, and type of steam flow.

    Size Comparison

    • Gas turbine power plants are smaller in size compared to steam power plants.

    Thermal Efficiency Improvement

    • The thermal efficiency of open cycle gas turbines can be improved using intercooling.

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    Description

    Test your knowledge of steam turbines, including condensing turbines and cross-compound steam turbines. Learn about the principles and applications of these systems.

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