Small sets are started manually by handles but for

  • No School
  • AA 1
  • maidelnava21
  • 62

This preview shows page 39 - 46 out of 62 pages.

Small sets are started manually by handles but for larger units above 75 kW compressed air is used. This system also includes (ammeters, voltmeters, wattmeters, thermometers, pressure gauges , visible and audible alarms)
Image of page 39
PARTS OF A DIESEL POWER PLANT 3. Lubrication System It includes the oil pumps, oil tanks, filters, coolers , purifiers and connecting pipes. The purpose of the lubrication system is to reduce the wear and tear of the engine parts and reduce friction of moving parts Part of the cylinder such as piston, shafts and valves must be lubricated. The lubricant is cooled before recirculation. Lubrication also helps to cool the engine.
Image of page 40
PARTS OF A DIESEL POWER PLANT Important Functions of a Lubrication System a. Lubrication - to keep parts sliding freely past each other reducing friction and wear b. Cooling - to keep surfaces cool by taking away part of the heat caused by friction c. Cleaning - to keep the bearings and piston rings clean d. Sealing - to form good seal with the piston rings and cylinder walls e. Reducing Noise - to reduce the noise of the engine by absorbing vibration
Image of page 41
PARTS OF A DIESEL POWER PLANT The clean lubricating oil is delivered to the points which require lubrication. The purpose of air coolers is to keep the temperature of the oil low. For prolonged life of engine, the oil used for lubrication should not be contaminated. There are three methods of purifying the lubricating oil; a. Settling b. Centrifuging c. Filtering
Image of page 42
PARTS OF A DIESEL POWER PLANT 4 . Fuel System It includes the storage tank, fuel pump, fuel transfer pump, strainers ,heater, connecting pipe works, and all day fuel tank Pump draws diesel from the storage tank , which is located outside, to day tank. The day tank supplies the daily requirements of the diesel engine and is usually placed high so that diesel flows to engine under gravity. Diesel is filtered before being injected into the engine by the fuel injection pump.
Image of page 43
PARTS OF A DIESEL POWER PLANT 5. Fuel Injection System It is supposed to be the heart of diesel engine and its failure means stopping of the engine. The fuel injection system performs the following functions: It filter the fuel insuring oil free from dirt. It meters the correct quantity of fuel to be injected in each cylinder. It times the injection process in relation to the crankshaft revolution. It regulates the fuel supply. It atomizes finely the fuel oil for better mixing with the hot air leading to efficient combustion. It distributes, the atomized fuel properly in the combustion chamber.
Image of page 44
PARTS OF A DIESEL POWER PLANT - There are two ways to atomize the fuel. In one case, air injection is used while in other methods, pressure or mechanical or solid injection is used. Nowadays the air injection is obsolete and mechanical injection is invariably used.
Image of page 45
Image of page 46

You've reached the end of your free preview.

Want to read all 62 pages?

  • Fall '19
  • Internal combustion engine, Diesel engine, Rudolf Diesel, diesel power station, GMR Vasavi Diesel Power Plant

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture