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MARINE INTERNAL COMBUSTION
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3351801
Code: 3351801
Credits: 5
Semester 5
ETC
MARINE INTERNAL COMBUSTION ENGINE-I
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MARINE INTERNAL COMBUSTION ENGINE-I Syllabus — Unit-wise Content
The official GTU curriculum for MARINE INTERNAL COMBUSTION ENGINE-I (subject code 3351801) as prescribed for ETC · Semester 5 divides the course into 5 units, covering 29 listed topics. The unit-wise breakdown below is read from the GTU syllabus document for this subject code, so you can check what the course actually covers before deciding which papers to attempt.
Download the official syllabus PDF (3351801)Unit 1 Introduction & Characteristics of IC Engine: 1.a 2 stroke & 4 stroke. 1.b Timing diagrams of
- 2. & 4 stroke cycles. 1.c I.C engines & parts
- 1.1. 4-Stroke and 2-stroke cycles; Deviation from Ideal condition in actual engines; Limitation in parameters.
- 1.2. Timing Diagrams of 2 - Stroke and 4-Stroke engines. Comparative study of slow speed, medium speed and high speed diesel engines - suitability and requirements for various purposes Mean Piston speed.
- 1.3. M.C.R. & C.S.R. ratings and thermal efficiency. Impulse-reaction and parson's turbine. Degree of reaction, condition for maximum Energy transfer in Reaction turbines.
- 1.4. Stage efficiency, overall efficiency and reheat factor, condition curve. Gearing and Lubrication System. Stresses acting on marine steam turbine.
- 1.5. Binary vapor cycle and its effect on Thermal Efficiency, Steam machinery plants, combined steam & gas plant.
- 1.6. Constructional Details of I.C. Engines: Principal Components: Fuel Injectors, Air Starting Valves, Relief Valves, Hydraulic exhaust valves, Air distributors, Jackets and Liners, Cylinder heads ,Piston, Cross heads, Connecting rods, Bed Plates, A-frames, Welded construction for Bed plates & frames, Tie rods.
Unit 2 Scavenging and Supercharging System 2.a Scavenging& Types 2.b Supercharging using turbochargers & its
- 2.1. Scavenging arrangements in 2-Stroke engines; Air charging and exhausting in 4-Stroke engines;
- 2.2. Various types of Scavenging in 2-stroke engines; Uni-flow, loop, cross loop and reverse loop scavenging, their merits and demerits.
- 2.3. Scavenge pumps for normally aspirated engines; under piston scavenging, Scavenge manifolds.
- 2.4. Pulse and constant pressure type; their relative merits and demerits in highly rated marine propulsion engine.
- 2.5. Air movements inside the cylinders. Turbocharger and its details. Two stage, un- cooled, radial turbochargers. Marine internal combustion engine -1 w.e.f. AY 2018-19 Page 3 of 5
Unit 3 Combustion & Dissociation 3.a Fuel & its combustion 3.b Fuel injectors & injection timings. 3.c Various
- 3.1. Definition of Fuel, combustion. Combustion Equation, Analysis of the Products of Combustion,
- 3.2. Stoichiometric combustion, Actual combustion, Excess Air, Mixture strength.
- 3.3. Dissociation. Effect of Dissociation on IC- Engines.
- 3.4. Combustion of Fuels: Grades of suitable fuels, Preparation of fuels for efficient combustions ,fuel atomization, ignition quality, fuel injectors and its details, ignition delay, afterburning
- 3.5. Compression Pressure Ratio and its effects on Engine. Reasons for variation in compression pressure and peak pressure. Design aspects of combustion chamber. Control of NOX and SOX in Exhaust emission.
Unit 4 Fuels & Lubricants 4.a Grades of fuels and properties. 4.b Testing for various parameters.
- 4.1. Composition, properties and characteristics of different fuels and lubricants, additives used, flash point & viscosity as applicable to petrol, kerosene, marine diesel oil, boiler fuel oil, lube oil.
- 4.2. Sampling and testing procedure, storage and transfer of fuel and lubricants.
- 4.3. Contamination of fuel and lubricants including microbes.
Unit 5 Medium speed Engines & Compressors
- 5.1. Different types of medium speed marine diesel engines, couplings, and reduction gear used in conjunction with medium speed Engine, Development in exhaust valve design, V-type engine details.
- 5.2. Use of poor quality residual fuels and their consequences.
- 5.3. Improvements in designs for higher power output.
- 5.4. Fuels, combustion process – fundamentals.
- 5.5. Principle of centrifugal compression and pressure rise in centrifugal compressor, change in Angular Momentum. Pre-whirl and pre-whirl vanes.
- 5.6. Mach number at inlet to a centrifugal compressor, slip and slip factor, multi-stage centrifugal compressor. Marine internal combustion engine -1 w.e.f. AY 2018-19 Page 4 of 5 Unit Unit Title Teaching Hours Distribution of Theory Marks Level Level Level Total Marks Introduction & Characteristics of IC Engine:
- 10. 05 08 03 16 II Scavenging and Supercharging System
- 10. 05 08 03 16 III Combustion & Dissociation:
- 06. 04 04 02 10 IV Fuels and lubricants 06 04 04 02 10 Medium speed Engines & Compressors
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