The function of the generator set water heater:
When the engine ambient temperature is lower than 4°C, during the starting phase, the coolant/lubricating oil of the motor may condense. If it is solid, it will lose its lubricating or cooling function, thus damaging the engine. Therefore, a heater must be installed on the engine to ensure normal engine starting and operation.
The heater has a light indicator function that can indicate different states of the heater. Three heating temperature levels can be adjusted, with dry burning and overheating protection functions. Once the heater is turned on, the water pump runs for 5 seconds. If the water temperature does not reach the set temperature and the heater does not dry out, the heater will start heating until the water temperature reaches the set temperatureset, then heating. enters automatic state when water temperature drops to reset. When the temperature drops below, the heater restarts heating.
Common faults and solutions are as follows:
What are the three cooling methods of diesel generator sets?
1. Closed-loop air cooling
For turbogenerators less than 50,000 kilowatts, a closed-loop air cooling system is often used and the engine fan is used. blow the heating components to cool them.
2. Hydrogen Cooling
For generators with a capacity of 50,000 to 600,000 kilowatts, hydrogen cooling is widely used. The heat dissipation performance of hydrogen (purity 99%) is better than that of air, and the heat dissipation effect is good. It can significantly reduceent the engine ventilation friction loss, thereby significantly improving the efficiency of the generator. Explosion-proof and leak-proof measures must be taken when using hydrogen cooling, which makes the engine structure more complex and increases the consumption and cost of electrode materials.
3. Liquid Cooling
The relative cooling capacity of water is 50 times that of air. To remove the same heat, the flow rate of water required is much lower than that of air. air. Therefore, using hollow wires in the coil and passing water through the wires for cooling can significantly reduce the temperature rise of the motor, delay insulation aging, and extend the service life of the motor.
Detailed information
Hydrogen strictly processed for cooling can ensure that the interThe inside of the generator is clean, the ventilation and heat dissipation effect is stable, and there will be no problems caused by dirt.
Hydrogen contains very little oxygen, less than 2%, and does not support combustion. Even if a short circuit fault occurs inside the generator, there is no risk of fire, which can greatly reduce the degree of combustion. Damage caused by fault. In hydrogen there is less noise and the insulating materials are less susceptible to oxidation and corona damage.
The hydrogen in the generator must maintain the specified purity to ensure the operating performance of the generator and avoid explosions. For this purpose, a hydrogen supply device must be installed.
References:
1. Wind Cooling Method: Wind cooling method uses air as the cooling fluid transfers heat from the heated parts of the diesel engine. This cooling method consists of a cooling fan and a guide cover.
In order to increase heat dissipation neps, many corrugated fins are usually cast on the outer walls of the cylinder block, cylinder head and each radiator. During operation, the fan rotates to circulate air along the air guide cover to the surface of the cylinder block and cylinder head. As cold air passes through the heat sink, it carries away heat from the cylinder block and cylinder head.
The air-cooled cooling system has a simple structure and small weight, but the cooling effect is poor. Heis mainly used in small diesel engines and is suitable for areas lacking water.
2. Water Cooling Method:
The water cooling method uses water as a cooling medium to transfer heat from the heated parts of the diesel engine. The characteristic of this cooling method is that it is easy to adjust the cooling intensity when the temperature or workload changes.
There are two types of water cooling methods: open type and closed type. In an open cooling system, the circulating water is directly connected to the atmosphere and the steam pressure in the cooling system is always maintained at atmospheric pressure. In a closed system, water circulates in the closed system and the vapor pressure of the cooling system is greater than atmospheric pressure. As the temperature difference between thecooling water temperature and outside air temperature increases, the heat dissipation capacity of the whole. the cooling system is improved.