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What should be paid attention to in the use of cooling water for diesel generator sets?

May 17, 2022
Cooling water plays an important role in the operation of diesel generators. Cooling water can effectively cool the unit and maintain the temperature balance of the unit. Therefore, the unit has very high requirements on the quality of cooling water. Users should pay attention to the following points during use point:
Heating water in winter
In the cold winter, the engine is difficult to start. If you add cold water before starting, it is easy to freeze in the water tank lower chamber and the water inlet pipe during the water filling process or when the water is not started in time, causing the water to fail to circulate and even Burst the tank. Adding hot water, on the one hand, can increase the temperature of the engine to facilitate starting; on the other hand, it can try to avoid the above-mentioned freezing phenomenon.
High quality antifreeze
At present, the quality of antifreeze on the market is uneven, and many are shoddy. If the antifreeze does not contain preservatives, it will seriously corrode the engine cylinder head, water jacket, radiator, water blocking ring, rubber parts and other components, and at the same time generate a large amount of scale, which will cause poor engine heat dissipation and cause engine overheating failure. Therefore, you must choose products from regular manufacturers.
Refill soft water in time
After the antifreeze is filled in the water tank, if the liquid level of the water tank is found to be low, on the premise of ensuring no leakage, only clean soft water (distilled water is better) needs to be filled, because the boiling point of the commonly used ethylene glycol antifreeze is high. , What evaporates is the water in the antifreeze, no need to add antifreeze but just add soft water. Worth mentioning: Never add unsoftened hard water.
Discharge antifreeze in time to reduce corrosion
Whether it is ordinary antifreeze or long-acting antifreeze, when the temperature becomes high, it should be released in time, which can prevent the corrosion of the parts. Because the preservatives added to the antifreeze will gradually decrease or fail with the extension of the use time, what's more, some do not add preservatives at all, which will have a strong corrosive effect on the parts, so it should be Release the antifreeze in time according to the temperature, and thoroughly clean the cooling pipeline after releasing the antifreeze.
Change the water and clean the pipes regularly
It is not recommended to change the cooling water frequently, because after a period of use, the minerals of the cooling water have been precipitated, unless the water is very dirty, which may block the pipeline and the radiator, do not replace it easily, because even the newly replaced cooling water has passed through. Softened, but still contains certain minerals, these minerals will be deposited in the water jacket and other places to form scale, the more frequently the water is replaced, the more minerals are precipitated, the thicker the scale, so it should be based on the actual situation. Change the cooling water regularly. When replacing, the cooling pipeline should be cleaned, and the cleaning solution can be prepared with caustic soda, kerosene and water. At the same time, maintain the water discharge switches, especially before winter, replace the damaged switches in time, and do not use bolts, sticks, rags, etc. to replace them.
It is not advisable to release water immediately when the temperature is high
Before the engine is turned off, if the temperature of the engine is very high, do not stop and drain the water immediately. Unload the load first to make it run at an idling speed, and then drain the water when the water temperature drops to 40-50°C to prevent the cylinder block, cylinder head, and water contacting with water. The temperature of the outer surface of the sleeve drops suddenly due to the sudden release of water and shrinks sharply, while the temperature inside the cylinder is still high and the shrinkage is small.
Open the lid of the water tank when pouring water
If the water tank cover is not opened when the water is discharged, although a part of the cooling water can flow out, as the water volume in the radiator decreases, a certain degree of vacuum will be generated due to the airtightness of the water tank, which will slow down or stop the water flow. And freeze the parts.
Idling after the water is released in the cold winter
In the cold winter, after the cooling water in the engine is released, the engine should be started to idle for a few minutes. This is mainly because some water may remain in the water pump and other parts after the water is released. After restarting, the body temperature can dry the water pump, etc. To ensure that there is no water in the engine, to prevent the phenomenon of water leakage caused by the freezing of the water pump and the tearing of the water seal.