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What is the Differences Between Air Cooled Diesel Generator and Water Cooled Diesel Generator?

What is the Differences Between Air Cooled Diesel Generator and Water Cooled Diesel Generator?

Air-cooled generator uses wind as a cooling medium to directly cool the diesel generator, and water-cooled generator uses water as a cooling medium, and then dissipates heat through a radiator tank and electric fan. Both are functionally dissipating heat in the air. There is not much difference in application, except that air cooling is suitable for plateaus or places where water is scarce or icy. It is not necessary to consider the problems of adding water, boiling point, freezing, etc.; when the water cooling is used in the plateau, the boiling point of water drops, and the cold places are When the machine is shut down, it freezes briefly, and the boiling point and freezing point can be improved by adding a certain proportion of increasing agent. In addition, the heat transfer performance of water is better. In fact, the two are basically not constrained by environmental conditions.

The biggest advantages of air-cooled units are simple structure, conducive to protection, low failure rate, good initiation performance, less air required, easier to shut down, high thermal efficiency, low power consumption of electric fan, low fuel consumption, no frost cracking or overheating boiling Risk, but subject to thermal and mechanical loads, the power is generally small. It is the problem of the water cooling system that the general failure share of the diesel generator set is above the general share. Air-cooled units are better. The biggest advantage of water-cooled generators is high efficiency and rapid cooling. Together, the power conversion rate of the body itself has increased.

The cylinder block and cylinder sleeve of the air-cooled initiator are integrated or joined into a gap-free whole. The inside is the working area of ​​the piston sliding, and the outside is uniformly and densely distributed fins. It is generally made of die-casting materials with high thermal conductivity. The heat of the piston team is directly transmitted through the cylinder and is taken away by the flowing air between the fins. This method is commonly used on two-stroke engines; water-cooled engines have complicated cooling water channels (dry cylinder liners) cast in the cylinder body, or form cooling water channels with the cylinder liner (wet cylinder liner), and the piston is in the cylinder liner During operation, heat is transferred to the cooling water in the water channel through the cylinder liner to perform cooling. This method is commonly used on four-stroke engine. Air-cooled generators are generally low-power, and the heat generation is not high, and air-cooling is sufficient; high-power generators need to be cooled with water because of the large heat generation.

The air-cooled generators of generator manufacturers have high thermal efficiency and economy. Because the air-cooled diesel generator transfers less heat to the air, the cooling air volume is only about 2/3 of the water-cooled diesel engine. This is because the higher the cylinder wall temperature of the air-cooled diesel engine, the higher the cylinder wall temperature is. The less heat the diesel engine emits into the air, the lower the thermal efficiency, the higher the fuel consumption, and the better the economy. Generally, the temperature of the cylinder wall of the air-cooled diesel engine is tens of degrees higher than that of the water-cooled diesel engine, so its thermal efficiency is higher than that of the water-cooled diesel engine.

The air-cooled generator of the generator manufacturer has a long service life, and the air-cooled diesel engine avoids acid corrosion and wear due to the high temperature of the cylinder wall and the maximum temperature. It reduces the operating time of the diesel engine below the dew point. Therefore, the air-cooled diesel engine has corrosion and cavitation. Corrosion and rust are small, and there is no disadvantage of scale accumulation in the cylinder head cover and radiator. Its service life is long. It can be seen that the air-cooled diesel engine has good maneuverability and short warm-up time. It is simple to avoid the burden of increasing the cooling water and releasing the cooling water, and there is no need to worry about the damage accidents such as freezing cracks in the cylinder block, cylinder head, radiator, etc. Less faults, long life, easy protection and maintenance.