Steam Condenser Functions and Benefits
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What is one of the purposes of a steam condenser as mentioned in the text?

  • Generating more steam for the steam engine or turbine.
  • Supplying cold and impure feed water to the boiler.
  • Increasing the available heat energy for converting into mechanical work. (correct)
  • Maintaining high back pressure on the exhaust side of the piston.

    • Which of the following is an organ of a steam condensing plant based on the text?

  • Pressure regulator
  • Exhaust fan
  • Wet air pump (correct)
  • Steam generator

    • How does a steam condenser impact the thermal efficiency of a condensing unit compared to a non-condensing unit?

  • Increases the thermal efficiency (correct)
  • Causes overheating issues
  • No impact on thermal efficiency
  • Decreases the thermal efficiency

    • What is the function of the hot well in a steam condensing plant?

    <p>To supply feed water for the boiler</p> Signup and view all the answers

    Why is it important for a steam condenser to maintain a very low back pressure on the exhaust side?

    <p>To allow the steam to expand more, resulting in increased available heat energy for work</p> Signup and view all the answers

    What is the role of the supply of cooling (or injection) water in a steam condensing plant?

    <p>To help in condensing the steam</p> Signup and view all the answers

    What is the major function of a steam nozzle?

    <p>To produce steam jet with high velocity to drive steam turbines</p> Signup and view all the answers

    What is the purpose of a turbine nozzle in an impulse turbine?

    <p>To direct the high-velocity steam jet against blades to convert kinetic energy into shaft work</p> Signup and view all the answers

    What is the function of a convergent-divergent nozzle in comparison to a convergent nozzle?

    <p>Produces steam at higher velocities</p> Signup and view all the answers

    What can be assumed about the flow of steam through a nozzle?

    <p>It is adiabatic</p> Signup and view all the answers

    What contributes to reducing the final velocity of steam in a nozzle?

    <p>Internal friction of steam itself</p> Signup and view all the answers

    How do frictional losses affect the expansion process in a nozzle?

    <p>Reduce final dryness fraction of steam</p> Signup and view all the answers

    What is the underlying principle of an evaporative condenser?

    <p>Reducing the water quantity needed for condensation</p> Signup and view all the answers

    In a down flow type of surface condenser, what is the direction of flow of the exhaust steam over the tubes?

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

    What is the position of the air suction in an inverted flow type of condenser?

    <p>At the top</p> Signup and view all the answers

    Which type of condenser adopts a regenerative method of heating the condensate?

    <p>Regenerative type</p> Signup and view all the answers

    What is a significant advantage of using a surface condenser?

    <p>Reuse of condensate for boiler feed water</p> Signup and view all the answers

    In a central flow type of surface condenser, where is the suction pipe of the air extraction pump located?

    <p>In the center of the tubes</p> Signup and view all the answers

    What happens to the exhaust steam after entering an inverted flow type of condenser?

    <p>It rises up and then flows down</p> Signup and view all the answers

    Why is it advantageous to have less chances of losing vacuum in a surface condenser?

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

    What is one disadvantage associated with an evaporative type of condenser?

    <p>Requires large floor area</p> Signup and view all the answers

    Which feature reduces the pressure drop of steam in a central flow type of surface condenser?

    <p>Large passages</p> Signup and view all the answers

    What is the formula for corrected vacuum in mm of Hg, based on the information provided?

    <p>760 - (Actual barometric height - Actual vacuum)</p> Signup and view all the answers

    What is the vacuum efficiency formula based on the given text?

    <p>Actual vacuum / (Barometer pressure - Absolute pressure of steam)</p> Signup and view all the answers

    What does condenser efficiency represent in a cooling system?

    <p>Ratio of cooling water temperature rise to difference in temperatures</p> Signup and view all the answers

    What is the purpose of a cooling tower in a power plant?

    <p>To cool the hot water from the condenser for reuse</p> Signup and view all the answers

    Which factor does NOT affect the cooling of water in a cooling tower according to the text?

    <p>Magnitude of sun's radiation</p> Signup and view all the answers

    Which material is NOT commonly used for constructing cooling towers according to the text?

    <p>(Fiberglass)</p> Signup and view all the answers

    What distinguishes natural draught cooling towers from mechanical draught cooling towers as per the text?

    <p>(Presence of fans vs Absence of fans)</p> Signup and view all the answers

    'Self-supported structures' mentioned in the text refer to what characteristic of concrete hyperbolic cooling towers?

    <p>(They are built without any external support)</p> Signup and view all the answers

    'DBT' and 'R.H.' mentioned in relation to natural draught cooling towers stand for what?

    <p>(Dry Bulb Temperature and Relative Humidity)</p> Signup and view all the answers

    'Enlarged top allowing water to fall out of suspension' is an advantage associated with what type of cooling tower?

    <p>(Concrete hyperbolic cooling towers)</p> Signup and view all the answers

    What is the major difference between a jet condenser and a surface condenser?

    <p>In jet condensers, the steam and water come into direct contact, while in surface condensers they do not.</p> Signup and view all the answers

    What is the main advantage of using a surface condenser over a jet condenser?

    <p>The cooling water in surface condensers can be made suitable for boiler feed.</p> Signup and view all the answers

    What is the purpose of the baffle plate in a low level jet condenser (Parallel-flow)?

    <p>To ensure proper mixing of the steam and cooling water.</p> Signup and view all the answers

    How does a high level jet condenser differ from a low level jet condenser?

    <p>A high level jet condenser is placed at a height above a hot well, unlike a low level jet condenser.</p> Signup and view all the answers

    What is the function of the air suction pump in a low level jet condenser (Counter-flow)?

    <p>To remove air from the condensate and water mixture.</p> Signup and view all the answers

    What is the purpose of the ejector condenser in the system?

    <p>To create a vacuum for efficient steam condensation.</p> Signup and view all the answers

    What distinguishes a counter-flow type jet condenser from a parallel-flow type?

    <p>In counter-flow, steam and cooling water flow in opposite directions; in parallel-flow, they flow downward together.</p> Signup and view all the answers

    What distinguishes a single-pass surface condenser from a double-pass surface condenser?

    <p>In single-pass, water flows through only some tubes once; in double-pass, it flows through all tubes twice.</p> Signup and view all the answers

    What is the distinguishing factor between high level counter-flow jet condenser and other types?

    <p>The use of a diverging cone to increase pressure energy before discharge.</p> Signup and view all the answers

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