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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- IV EXAMINATION — SUMMER 2020
Subject Code: 2140907 Date:26/10/2020
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Subject Name: Applied Thermal and Hydraulic Engineering
Time: 10:30 AM TO 01:00 PM Total Marks: 70
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Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) List the main component of Steam Power Plant and Describe the function of a condenser in steam power plant. 03
(b) Explain briefly the various modes of Heat Transfer with example. 04
(c) Explain with T-S and p-V diagram of Brayton cycle for Gas turbine Power plant. 07
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Q.2 (a) Define Co-efficient of performance and 1 Ton of refrigeration (TR). 03
(b) In a constant pressure open cycle gas turbine air enters the compressor at 1 bar and 17°C where it is compressed to a pressure ratio of 7. The gases enter the gas turbine at 740°C and expand to original pressure. Calculate Turbine work output and Compressor work Input. Assume, Y=1.4. Cp=1.0 kj/kg k for air & gases Neglect the mass of fuel. 04
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(c) Describe the simple vapour compression refrigeration system with T-S and P-H Diagram. 07OR
(c) Explain working of Rankine cycle with its P-V, T-S and h-s diagrams. 07
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Q.3 (a) Define Natural and force convection. 03
(b) State and derive Fourier’s law of conduction heat transfer. 04
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(c) Deduce the expression for conduction heat transfer through a composite wall. 07OR
Q.3 (a) Define absorptivity, reflectivity and transmissivity. 03
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(b) Explain different types of fins and their application. 04
(c) Explain with neat diagram, the arrangement and working of parallel flow heat exchanger. 07
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Q.4 (a) Define the term: Specific gravity, kinematic viscosity, mass density. 03
(b) Explain the Pascal’s law with usual notation. 04
(c) Classification of manometers and explain U-tube differential manometer. 07
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OR
Q.4 (a) List the assumptions which are made while deriving Bernoulli’s equation. 03
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(b) Explain the surface tension. 04(c) Deduce the Euler’s equation of motion along a stream line. 07
Q.5 (a) Classification of reciprocating pump. 03
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(b) Define NPSH? State its importance. 04
(c) Explain with neat sketch the function of main component of centrifugal pump. 07
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OR
Q.5 (a) Define hydraulic turbine and classify hydraulic turbine. 03
(b) Explain draft tube and its importance. 04
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(c) Explain with neat sketch the Kaplan turbine. 07
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