Working Principle and Operation Guide for Gas Generators

 
Gas generators are efficient devices that convert the chemical energy of gas into electrical energy, widely used in industrial, commercial, and residential settings. Due to their clean, flexible, and efficient characteristics, gas generators play a crucial role in modern energy systems. This article will provide a detailed overview of the working principle of gas generators, their operating methods, and shutdown procedures, helping users better understand and utilize this equipment.
 

Working Principle of Gas Generators

 
The working principle of a gas generator can be broken down into the following steps.
 
1. Fuel Supply: Gas generators require fuel such as natural gas or liquefied petroleum gas. These fuels are delivered to the generator's combustion chamber through dedicated pipelines.
 
2. Combustion Process: Once the gas enters the combustion chamber, it mixes with air and is ignited by an ignition device. The combustion process involves a chemical reaction between the gas and air, releasing a significant amount of heat energy.
 
3. Heat Energy Conversion: The heat energy produced from combustion is transferred to a working fluid (typically air or steam), turning it into high-temperature, high-pressure gas. This gas then flows into the turbine section of the generator.
 
4. Turbine Drive: The high-temperature, high-pressure working fluid strikes the turbine blades, causing the turbine to rotate at high speed. This rotation drives the connected generator rotor.
 
5. Electricity Generation: As the generator's rotor spins, its magnetic field interacts with the stator coils, generating induced current and converting mechanical energy into electrical energy for user consumption.
 
6. Exhaust Emission: After passing through the turbine, the working fluid becomes low-temperature, low-pressure exhaust gas, which is discharged through exhaust pipes. Modern gas generators often include exhaust treatment systems to reduce pollutant emissions.
 
7. Cooling System: To ensure continuous operation, gas generators are equipped with cooling systems to prevent overheating. These systems typically use coolant or air to dissipate heat.
 

Operating Methods and Steps

 
1. Manual Operation
 
Pre-start Preparation: Close the pre-supply oil switch and start the electric pre-supply oil pump, ensuring the main oil circuit pressure reaches over 100kPa.
Starting the Unit: Press the start button. Once the unit starts, release the button and disconnect the start switch. If starting fails three times in a row, check for faults and rectify them before attempting again.
Parameter Check: After starting the unit, monitor the engine parameters on the LCD screen. Once the oil and water temperatures reach above 40°C, the engine can be accelerated and loaded.
 
2. Automatic Operation
 
Standby Mode: Keep the generator in a ready-to-start state.
Automatic Start: Upon receiving a start command from the automatic control system, the generator will start automatically and connect to the load once it reaches the rated state, ensuring uninterrupted power supply.
 
3. Shutdown Procedures
 
Unload and Disconnect: Gradually remove the load and disconnect the main switch.
Reduce Speed: Set the speed selector switch to "idle" position, reducing the engine speed to 1500 rpm.
Shutdown Operation: Turn the "shutdown" knob to the stop position, halting the engine.
Reset Controls: Set the electrical switch to the stop position, and return all adjustment knobs to their stop positions, completing the shutdown process.
 
Gas generators convert the chemical energy of gas into heat energy through combustion, and then into mechanical and electrical energy via turbines and generators. Their efficiency, cleanliness, and flexibility make them essential in modern energy systems. Proper operation and maintenance are crucial for ensuring their efficient and safe operation.