What are the outstanding features of turbocharged diesel generators?

Diesel generator set mainly consists of diesel engine, synchronous generator, control panel, supporting electrical control equipment and various auxiliary components, and turbocharger is one of the auxiliary components, the exhaust gas turbocharging system added to the set to increase the power of the diesel engine by about 40%, the fuel consumed can be reduced by about 5.5%, but also to purify the exhaust gas emissions.

Diesel generator set

 

Diesel generator set mainly consists of diesel engine, synchronous generator, control panel, supporting electrical control equipment and various auxiliary components, and turbocharger is one of the auxiliary components, the addition of exhaust gas turbocharging system makes the power of the diesel engine increased by about 40%, the fuel consumed can be reduced by about 5.5%, but also can make the exhaust gas emissions can be purified. In general, turbocharged diesel generators have the following outstanding features.

 

1, increased intake pressure

 

Turbocharger is a device that uses exhaust rather than engine power to push the air pump or compressor, by which the air pump will increase the air pressure into the cylinder. Turbocharger can be used on both diesel and gasoline engines. A typical sketch of air and exhaust in a turbocharged engine. High velocity exhaust exits the exhaust door and passes through a turbine-driven pump that drives the exhaust turbine to turn rapidly, which in turn drives the intake compressor to turn rapidly. As the compressor turbine spins, it draws in a large volume of fresh air. The intake air is pressurized and pressed into the intake valves. The pressurization process in the intake manifold is called boost (Boast). Pressurization can produce a higher pressure in the intake manifold, and the pressure varies from manufacturer to manufacturer.

 

2、Unit power increase

 

If the corresponding amount of fuel is increased, it will make the generator power significantly higher, compared with naturally aspirated generators, at the same speed, turbocharged generators have higher power.

 

3, turbocharged engine mechanical parts to strengthen

 

Turbocharged engines require a number of internal changes, including strengthening the piston, the use of different piston rings, as well as to ensure that the bearings can withstand greater loads. However, turbocharged and non-turbocharged engines use the same compression ratio and emissions and electronic control devices.

 

4. Intake and exhaust pipe changes

 

With a turbocharger, the intake duct is changed. Exhaust gas passes through the exhaust manifold and enters the exhaust turbine of the turbocharger. From the exhaust turbine, the exhaust gas is sent to the outside atmosphere through the exhaust system. With the use of a turbocharger, the intake piping will be different from a typical non-supercharged generator. The design of the intake and exhaust piping on a diesel generator allows the turbocharger to be placed on the generator side.

 

5, power delay

 

Power delay is the time required for the turbocharger to increase power, which is a delay between the throttle quickly open and achieve boost, from the operator to request additional power to the actual power generation delay, this is because the turbo speed up and generate the required power takes a certain amount of time.

 

6、Exhaust temperature drop

 

The heat in the exhaust system will make the generator and exhaust system nausea, with the requirement of higher power generator, exhaust temperature is often higher, when the generator is equipped with a turbocharger, the exhaust temperature is usually slightly lower, this lower exhaust temperature eventually extended the life of the exhaust valve and exhaust system.

 

The above is the introduction of the characteristics of turbocharged generators, foreign large and medium-sized generators and some domestic generators are equipped with turbochargers, turbocharger speed is very high, the parts are also more precise, when the unit failure requires disassembly and maintenance, maintenance personnel must be familiar with the relative position between the parts.