The hazards of long-term no-load diesel generator sets mainly include overheating, carbon deposition, wear, insufficient lubrication, engine overheating, fuel waste, and difficulty in starting.
The diesel generator set is running in a no-load state, that is, there is no external load connected. Although the generator set is still running, it does not provide any effective power output. In this case, the diesel generator set will face a series of problems:
1.Overheating: Since the load of the diesel generator set is very small in the no-load state, the heat generated cannot be fully utilized, resulting in the failure of heat dissipation in time, causing the temperature of the generator set to rise, affecting its normal operation.
2.Carbon deposition: Long-term no-load will cause carbon deposition in the diesel generator set. Residues such as soot and carbon generated during operation will accumulate in the combustion chamber, affecting the performance and life of the diesel generator set.
3.Wear: In the no-load state, the load of the generator set is very small, and it cannot effectively reduce friction and wear, resulting in increased wear of the components of the generator set and shortening its service life.
4.Insufficient lubrication: When running at no load, the speed of the generator may decrease, resulting in a reduction in the pumping speed of the lubricating oil, which in turn leads to insufficient lubrication and increased friction and wear inside the engine.
5.Engine overheating: When the engine is not loaded, the efficiency of the cooling system may be reduced, causing the internal temperature of the engine to rise easily. Long-term high-temperature operation will aggravate mechanical wear and even cause engine damage.
6.Fuel waste: When the diesel generator is not loaded, the fuel consumption rate is high, and the fuel fails to be converted into effective power output, resulting in energy waste.
7.Starting difficulties: After long-term no-load operation, the combustion chamber, injector and other components of the diesel generator may produce carbon deposits, affecting the normal operation of the combustion chamber, injector and other components, resulting in starting difficulties.
In order to avoid the above problems, the diesel generator set should follow the following operating suggestions when using it: avoid long-term no-load operation; regularly inspect and maintain the generator; reasonably control the load to avoid overload or long-term low-load operation.
