Diesel Genset is a combination set where an Alternator is run by a diesel engine. Alternator is known as generator. Diesel Engine is used to rotate the alternator. Engine get energy from diesel.

As a emergency power-supply in Industries Diesel generator sets are generally used. And it can be a backup powersupply if the grid fails.
While it is rotating, alternator generates the power . Engine is tool to rotate alternator.

Four cycle is commonly seen in Diesel Engine. They are: Intake, Compression, Combustion and finaly Exhaust.

Diesel Genset works exactly according to the Energy conversion law. It is known to us that Energy cannot be created. We can only convert energy into other forms of energy.
Initialy Diesel have chemicalenergy but during combustion process chemical energy converted into heat, finaly heat tocverted to force. Finaly, force works as a mechanical energy that rotate the Alternator.
Then alternator converts the mechanical energy into Electrical Energy. Some energy losses as heat in the process which goes to atmosphere by the help of radiator.
We know that Radiator is a cooling system.Modern diesel engine able to convert energy with high efficiency up to 45%. That means 55% of energy losses as heat .

From the above discussion we can divide Genset mainly into three parts. They are 1. Alternator 2. Engine and 3. Radiator. There are other sub parts or helping spare parts of that main three parts. Most common sub parts are Exhaust, water separator, turbo charger, fuel filter, lube oil filter, control panel, air filter , battery, battery charger, After cooler, breather filter, starter motor, oil chamber and few others spare parts.


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