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InsemMar 20242019 patternBE Mech

Energy Engineering SPPU Insem Question Paper Mar 2024

All 4 questions from this SPPU insem paper, as printed. Read them here or open the PDF.

Open the PDFMost repeated Energy Engineering questions
Subject code
402049
Pattern
2019 pattern
Exam
Insem
Session
Mar 2024
Max. marks
30
Time
1 Hour
Semester
VIII
Paper code
[6270]-110

Printed for: B.E. (Mechanical) (Insem)

Instructions to the candidates

  1. Answers Q1 or Q2, Q3 or Q4.
  2. Neat diagrams must be drawn wherever necessary.
  3. Figures to the right of each question indicate full marks.
  4. Assume Suitable data wherever necessary and mention the same clearly.
  5. Use of steam tables, mollier chart and calculator is allowed.

Questions

  1. Q1

    1. a)

      What do you mean by high pressure boilers? Discuss the construction and working of Benson boiler with neat sketch.

      [7]
    2. b)

      The steam at 70 bars and 500 degrees Celsius is supplied to the steam turbine. The steam is expanded in a high-pressure turbine isentropically till it is dry saturated. The steam is reheated up to 400-degree Celsius passing through the reheater. Expansion after reheating is carried out to condenser pressure to 0.2 bars. Draw cycle arrangement and T-s diagram Determine : i) Thermal efficiency of the cycle ii) Work output in MW if the steam flow rate is 10 kg/sec.

      [8]

  2. Q2

    1. a)

      Explain in brief site selection criteria for thermal power plants. State the types of coal based on carbon content with suitability on thermal power plant.

      [7]
    2. b)

      In a regenerative Rankine cycle steam enters in turbine at 120 bars and 550 degrees Celsius and leaves at 0.05 bars. Steam is bled from turbine at 20 bars pressure for heating in open feed water heater. Draw cycle arrangement and T-s diagram Determine i) The thermal efficiency of the cycle ii) Specific steam consumption

      [8]

  3. Q3

    1. a)

      How condenser water cooling systems are classified? Discuss closed type condenser water cooling systems with simple diagram.

      [7]
    2. b)

      Following data is available from test on surface Condenser Barometer Reading : 760 mm of Hg Condenser Vacuum : 700 mm of Hg Hot well Temperature : 30 degree Celsius Mean Condenser Temperature : 34 degree Celsius Rate of condensate : 1.78 Tph Cooling water inlet Temperature : 22 degree Celsius Cooling water outlet Temperature : 32 degree Celsius Quantity of Cooling Water : 1.54 Tones per minute Sp heat of Water : 4.187 kJ/Kg-K Gas constant for air : 0.287 kJ/Kg-K Determine : i) Vacuum Efficiency ii) Condition of steam at condenser inlet iii) Mass of air present per cubic meter

      [8]

  4. Q4

    1. a)

      What do you mean by ESP? Discuss the working principle and function of the same with simple diagram.

      [7]
    2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [8]