DISEL ELECTRIC POWER PLANT

It is a poniard in which a diesel engine is used as a prime mover for the generation of electrical energy. The diesel engine obtains energy from a liquid fuel usually called diesel oil and converts it into mechanical energy.An alternator or a DC generator mechanically coupled to the diesel engine to convert the mechanical energy into electrical energy.

                                             A diesel electric power plant is also included in this workshop to supply the electric power in absence of both north feeder and south feeder. It works to generate the required electrical power for the workshop.

              

                      

 ELEMENTS OF DIESELELECTRIC POWER PLANT:

Diesel Engine:

This is the main component of the power plant which develops power. This may be horizontal or vertical type. The horizontal type diesel engine is used in this workshop. These engines are available in low, medium and high range. Speeds commonly used are in the range of 5000 to 1000 rpm. The rating of an engine which should be specified correctly is the net output in KW developed continuously at the crank shaft coupling by the engine in good operating condition, at a height of less than 450 m at a temperature of 32 Deg C and barometric pressure 717.5mm Hg.

ENGINE AIRINTAKE INCLUDING AIR FILTERS, DUCTS AND CHARGER:

       

The air filter are provided to remove dust and other suspended impurities from air to be supplied to the engine. The super charger is usually employed to increase the pressure of intake air above atmospheric Ozone in order to develop an increased power output. The air is drawn from outside the engine room and delivered to the Intel manifold through ducts or pipes and filters. In cold season the intake air is heated by the heat from exhaust gases.

ENGINE FUELSYSTEM INCLUDING FUEL TRANSFER PUMPS, STRAINERS, HEATERS AND CONNECTING PIPEWORKS:

    

 Fuel transfer pumps are required to transfer fuel from delivery point to storage tanks and form storage tanks to day tanks and then to engine. Strainers are provided to remove suspended impurities and thus ensure clean fuel supply to the engine. Heater are required to clean the oil especially during winter season.

Engine exhaustsystem including silencer and ducts:

This system is provided to discharge the engine exhaust to the atmosphere outside the building. The temperature of exhaust gas is high so its heat is utilized in heating oil or air supplied to the engine in winter season.

Engine coolingsystem including pumps, tower or spray ponds, water treatment or filtrationplant and connecting pipe:

        

In engine the heat is generated due to burning of and it uses partially gets converted into useful work. The remainder is wasted as heat in the outgoing exhaust gases and in heating the engine, and if not removed may disintegrate the lubricating oil film on the cylinder walls and damage the cylinder liners, head, walls piston and rings.

         So small engines may be air cooled but large engines mostly make use of forced water cooling cooled cold water is send through the cylinder jacket with the help of a pump. The hot water is cooled in spray pond and is circulated. The water used for cooling engine cylinder is softened by water filtration plant in order to avoid formation of scales etc. in it. Hot well is provided in surge tank to make a provision for expansion of jacket water.