(1) Engine:
This is the main component of the plant which develops power.
Generally engine is coupled directly to the generator.
(2)Engine fuel system :
This includes fuel storage tanks, fuel transfer pumps, strainers, heaters and connecting pipe work.
Fuel transfer pumps are required to transfer fuel from delivery point to storage tanks and from storage tanks to engine.
Strainers are needed to ensure clean fuel.
Heaters for oil may be required especially during winter.
3) Engine air intake system :
This includes air filters, ducts and super-charger (an integral part of the engine).
The purpose of air filters is to remove dust from the air to be supplied to the engine.
The system supplies the required quantity of air for combustion,
The supercharger Increase the pressure of air supplied to the engine so that it could develop an Increased power output. They are generally driven by the engines,
(4)Engine exhaust system:
This includes silencers and connecting duets.
As the temperature of exhaust gases is sufficiently high heat of these gases is utilized in heating oil or air supplied to the engine.
The silencer reduces the noise level.
(5)Engine cooling system:
This includes coolant pumps, cooling towers or spray ponds, water treatment of filtration plant and connecting pipe work.
The purpose of cooling system is to carry heat from engine cylinder to keep the temperature of cylinder within safe limits.
The pump circulate water through cylinder and head jackets to carry away heat.
Thus, the simplest cooling system would need only a water source, a pump and a place for disposal of hot water
Usually, however, the same water is recirculated by cooling it in devices such as radiators, evaporative coolers, cooling tower, spray ponds etc.
(6) Engine lubrication system:
This includes lubricating oil pumps, oil tanks, filters, coolers, purifiers and connecting pipe work.
The function of the lubrication system is to reduce the friction of moving parts and reduce the wear and tear of the engine parts.
(7)Engine starting system:
This includes storage battery, compressed air lanks, self starter etc.
The function of the starting system is to start the engine from cold by supplying compressed air.
The system enables the engine to rotate initially while starting until the firing starts and the unit runs on its own power.
