Difference Between Diesel Generator and Gasoline Generators

Although diesel generators and gasoline generators are used for emergency power generation, they work differently except for the name and oil. The diesel generator is a diesel engine that drives the generator to convert the energy of the diesel into electrical energy. The gasoline generator is a gasoline engine that drives the generator to convert the energy of the gasoline into electrical energy. The following is a detailed introduction to the difference between the two.

Working principle of diesel generator

In the cylinder of the diesel engine, the clean air filtered by the air filter is fully mixed with the high pressure atomized diesel fuel injected from the injector. Under the upward extrusion of the piston, the volume is reduced and the temperature is rapidly increased to reach the ignition point of the diesel. The diesel is ignited, the mixed gas burns violently, the volume expands rapidly, and the piston is pushed down, which is called work. Each cylinder performs work in a certain order, and the thrust acting on the piston passes through the connecting rod to become a force that pushes the crankshaft to rotate, thereby driving the crankshaft to rotate.

Working principle of gasoline generator

In the cylinder of the gasoline engine, the mixed gas burns violently, and the volume expands rapidly pushing the piston to work downward. Each cylinder performs work in a certain order, and the thrust acting on the piston passes through the connecting rod to become a force that pushes the crankshaft to rotate, thereby driving the crankshaft to rotate. By installing the brushless synchronous alternator coaxially with the gasoline engine crankshaft, the rotor of the generator can be driven by the rotation of the gasoline engine. By using the principle of "electromagnetic induction", the generator will output an induced electromotive force, and a current can be generated through the closed load circuit. .

It can be seen from the above that in the diesel engine, the mixture is compressed into heat, and the mixing of fuel and air in the cylinder of the gasoline engine is marked with a spark plug; diesel is less volatile than gasoline, and has a larger gallon per gallon. The calorific value, that is, 5dm3 diesel can obtain more power than 5dm3 gasoline; in the diesel engine, the mixture of diesel and air is carried out after the diesel is injected into the cylinder, while in the gasoline engine, the fuel and air are in the carburetor and the intake Mixed in the pipeline. Since the mixing must be immediately after the fuel eruption, the diesel generator needs to have a specially planned combustion chamber to facilitate the mixing of diesel and air. Therefore, the planning and production of the combustion chamber is very important for diesel generators.

The difference between diesel generator sets and gasoline generator sets

The difference between a diesel generator set and a gasoline generator set is mainly due to the different performance of its diesel engine and gasoline engine.

1. The type of fuel

Diesel is a fuel that is less volatile than gasoline, and has a large calorific value per liter of diesel.

2. The type of ignition

In the cylinder of a gasoline engine, a mixture of fuel and air is ignited with a spark plug. In a diesel engine, the mixture is ignited by the heat generated by compression.

3. Mixing of fuel and air.

In a gasoline engine, fuel and air are mixed in a carburetor and an intake duct. In a diesel engine, the mixing of fuel and air is performed after the diesel is drawn into the cylinder.

4. The output power of a diesel generator is much larger than the output power of a gasoline generator set. The average power of a typical gasoline generator set is only 10KW, while the minimum power of a diesel generator set is 8KW.

5. Gasoline generator sets are small in size.

The movement is convenient, and the diesel generator set is bulky and inconvenient to move.

What are the advantages of diesel generator sets compared to gasoline generator sets?

There are many models in the generator set, and the power is different. Most of the large and medium-sized generator sets are fueled by diesel. The generators with smaller power are generally fueled by gasoline. So what are the advantages of a diesel generator set with a diesel engine and a gasoline generator set with a gasoline engine as a generator power source?

1. Fuel consumption

The diesel engine has high thermal efficiency, low fuel consumption rate, and the fuel pump rate curve changes relatively flat when the working conditions change, which is very important for diesel engines that often work under partial load.

2. Reliable and durable work

Since there is no ignition system the diesel engine, the fault is relatively small and the work reliability is high.

3. Wide range of use

4. Lees harmful emissions

5. Good fire safety