Temperature Control in Diesel Generator Cooling Systems

 
The cooling system of a diesel generator is a crucial component for its normal operation, regulating the temperature to ensure it operates within the appropriate range. However, problems with the cooling system of diesel generator can lead to either low temperature or overheating operation, resulting in a series of malfunctions that affect the reliability and lifespan of the equipment.
 
1. Low Temperature Operation Issues
 
When the diesel generator operates at a water temperature below 65°C, it is termed as low-temperature operation. This is mainly caused by the failure of the thermostat, allowing the coolant to enter the main circulation prematurely, resulting in low-temperature operation and inefficient combustion.
 
Potential Impacts: Low-temperature operation increases the wear of engine components, particularly the cylinder liners, and may lead to incomplete combustion of diesel, producing harmful emissions that affect both the environment and the health of the equipment.
 
Solutions
 

• Observe the rate of temperature rise in the coolant; a slow rise may indicate thermostat failure.
• Check the radiator coolant temperature and compare it with the engine water jacket temperature; any disparity may signify thermostat malfunction.
• Disassemble and inspect the thermostat to ensure its proper functioning; replace it if necessary to avoid shortening the generator's lifespan.

 
2. Overheating Operation Issues
 
To maintain the diesel generator in a thermal balance state, the cooling water needs to remove a certain proportion of heat. However, when the engine's water temperature exceeds 95°C, overheating operation occurs. This may be due to cooling system failures or excessively high ambient temperatures.
 

• Monitor the readings of the water temperature gauge and the torque converter oil temperature gauge; if they exceed normal ranges, immediately cease operation and reduce engine speed.
• Avoid adding coolant directly during overheating to prevent exacerbating the issue.
• Regularly inspect the cooling system to ensure the radiator, thermostat, and other components are functioning properly; perform maintenance and replacement as needed.

 
The proper operation of the cooling system is crucial for the stable operation of a diesel generator. Timely identification and resolution of cooling system operation issues not only ensure the safe and reliable operation of the equipment but also contribute to extending its lifespan, reducing maintenance costs, and improving production efficiency. Therefore, regular inspection and maintenance of the cooling system are indispensable.