Using silent diesel generators in winter is quite inconvenient, as they often overheat. This is why there are many precautions to take. Here, the editor will discuss some tips for you:
Silent Diesel Generator
One, avoid using fuel arbitrarily. Low temperatures in winter can degrade the flow properties of fuel, increasing its viscosity and making it difficult to atomize, leading to poor atomization and worsened combustion. This results in a decrease in the power and economic performance of the generator set. Therefore, in winter, silent diesel generator sets should use light diesel with a low pour point and good ignition properties. Generally, the pour point of the light diesel should be 7-10 degrees Celsius lower than the current low temperature of the local season. When the winter temperature is above 0 degrees Celsius, use -10# light diesel; in cold areas, use -35# light diesel for fuel, and 90# unleaded gasoline or above for gasoline engines.
Avoid randomly selecting engine oil. In winter, the low temperatures increase the viscosity of engine oil. It is recommended to use 5W/30 or 5W/40 grade oil for the engine. For gasoline generator sets, use 15W-30 oil with SJ, SG grade or higher.
Three, Use of Antifreeze (Water-cooled Generator Sets). When the temperature drops below 5 degrees Celsius, antifreeze should be added. Taking the Cummins generator set with 30KW and model 4T3.9-G2 as an example, the coolant capacity is approximately 25L. Please add antifreeze to the water tank recently and regularly check the concentration of the antifreeze. Otherwise, any accidents caused by freezing, such as cracked cylinder blocks, will be borne by the user.
Please drain the coolant from the water-cooled generator set if it has been unused for an extended period during winter.
Four, Low-Temperature Start: Generally, when the temperature is below 5 degrees Celsius, the power switch of the water heating device should be turned on before the engine starts for preheating. Wait until the preheating reaches above 45 degrees Celsius (pre-set) before starting the engine (mainly preheating the surrounding components of the diesel engine cylinder liners, thereby heating the temperature of the misty diesel, as diesel engines are compression-ignition type).
After the diesel generator set is ignited and started, it cannot be loaded immediately. The engine, which has just been ignited, is prone to severe wear due to its low body temperature and thick oil viscosity, which makes it difficult for the oil to fill the friction surfaces of moving parts. Additionally, the plunger springs, valve springs, and injector springs are susceptible to breaking due to their "cold brittleness." Therefore, after the engine is ignited in winter, it should run under no load for a few minutes before additional loading is applied.
Six, for air-cooled machines, apart from not requiring a coolant change, follow the above points for the rest.
