Diesel Power Plant

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Diesel Power Plant

  1. 1. DIESEL (ENGINE) POWER PLANT - Vanita Thakkar Associate Professor, Mechanical Engineering Department, Babaria Institute of Technology, Varanama, Vadodara
  2. 2. INTRODUCTION DIESEL (ENGINE) POWER PLANT (DPP) : A power plant in which Diesel Engine is used as a prime mover to for generation of electricity. VANITA THAKKAR BIT, VARNAMA 2
  3. 3. RECALL : DIESEL ENGINE Constant pressure heat addition Constant volume heat rejection VANITA THAKKAR BIT, VARNAMA 3
  4. 4. APPLICATIONS OF DPPs Central Station for Small and medium power outputs (upto 5-10MW capacities), e.g. in hilly or island areas (fuels like coal, natural gas are not available and requirements like water supply, grid, space, etc. of other types of power plants cannot be met). Can be used as : Standby unit . Nursery unit – temporary unit for setting up other power plants. Emergency unit – as in hospitals, malls, auditoriums, colleges, radio stations, etc. Mobile unit. Peak load plant. Captive Power Plant – for small industries. VANITA THAKKAR BIT, VARNAMA 4
  5. 5. OUTLINE LAYOUT OF DPP VANITA THAKKAR BIT, VARNAMA 5
  6. 6. GENERAL LAYOUT OF DPP : VANITA THAKKAR BIT, VARNAMA 6
  7. 7. ESSENTIAL COMPONENTS OF DPP 9. GOVERNING SYSTEM 7. STARTING SYSTEM 10. GENERATOR VANITA THAKKAR BIT, VARNAMA 5. COOLING SYSTEM 8. STOPPING SYSTEM 7
  8. 8. DIESEL ENGINE TWO STROKE ENGINE  Rugged and compact.  Simple design.  Smaller flywheel.  Develops more power for same speed and piston movement.  Less capital cost.  More favoured for DPP.  However, high operating cost, due to rising fuel costs (more specific fuel consumption). FOUR STROKE ENGINE  Low specific fuel consumption.  More effective lubrication.  More flexibility.  Less noisy exhaust.  Simple and better cooling.  Better scavanging.  Higher efficiency.  Now a days, more preferred for DPP due to high fuel costs. Available in : 75kW to 40 MW range. VANITA THAKKAR BIT, VARNAMA 8
  9. 9. FUEL SUPPLY SYSTEM - typical VANITA THAKKAR BIT, VARNAMA 9
  10. 10. COMMON RAIL FUEL SUPPLY SYSTEM VANITA THAKKAR BIT, VARNAMA 10
  11. 11. COMMON RAIL FUEL SUPPLY SYSTEM (another representation) VANITA THAKKAR BIT, VARNAMA 11
  12. 12. TYPICAL FUEL INJECTOR VANITA THAKKAR BIT, VARNAMA 12
  13. 13. ENGINE COOLING SYSTEM ENGINE COOLING SYSTEM WATER COOLING (INDIRECT COOLING) FORCED CIRCULATION COOLING OPEN SYSTEM THERMOSTAT COOLING AIR COOLING (DIRECT COOLING) NATURAL COOLING (THERMOSYPHON COOLING) CLOSED SYSTEM PRESSURIZED WATER COOLING STEAM OR EVAPORATIVE COOLING BY-PASS COOLING SYSTEM VANITA THAKKAR BIT, VARNAMA 13
  14. 14. ENGINE COOLING SYSTEM VANITA THAKKAR BIT, VARNAMA 14
  15. 15. ENGINE LUBRICATIONEnsures frictionless SYSTEM operation of piston. Carries away dirt and particulates left out by piston movement. Carries away heat from engine cylinder. VANITA THAKKAR BIT, VARNAMA 15
  16. 16. ENGINE EXHAUST SYSTEM VANITA THAKKAR BIT, VARNAMA 16
  17. 17. AIR INTAKE SYSTEM  Wet type Dry type To supply clean, debrisfree and cool (supercharged) air with least noise. Wet type • Dirt from sucked / bubbled air sticks to oil in oil bath. • Then, air passes through screen type material to remove entrapped oil particles. • Paper, cloth or metal screen used to catch and trap dirt. VANITA THAKKAR BIT, VARNAMA 17
  18. 18. ENGINE STARTING SYSTEM Start signal sent to starting motor  Air, electric, or hydraulic motor, will engage engine’s flywheel Starting motor will crank / spin the engine at a high enough rpm Engine’s compression increases to ignite the fuel  engine starts running. The engine accelerates to idle speed. When starter motor is overdriven by the running motor it will disengage the flywheel. VANITA THAKKAR BIT, VARNAMA 18
  19. 19. ENGINE STOPPING SYSTEM  Stopping fuel supply : ◦ Most commonly used. ◦ Fuel supply to fuel injection pump is cut by a solenoid valve placed near the inlet of fuel injection pumps. ◦ Solenoid valve : the valve needle has magnetic head placed inside a solenoid (coil Magnetic Force which or wire). Electric current in the coil Fuel flow starts moves needle. Hand operated switch  current stops Needle comes back on the supply inlet  Fuel flow stops. VANITA THAKKAR ENGINE STOPS BIT, VARNAMA 19
  20. 20. ENGINE STOPPING SYSTEM (CONTD.) Other methods of stopping DE :  Keeping exhaust valve open.  Shutting of air supply. VANITA THAKKAR BIT, VARNAMA 20
  21. 21. THANKS !!! VANITA THAKKAR ASSOCIATE PROFESSOR, MECHANICAL ENGINEERING DEPARTMENT, BABARIA INSTITUTE OF TECHNOLOGY, VARNAMA, VADODARA VANITA THAKKAR BIT, VARNAMA 21

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