There are two cooling methods for diesel generator sets: air cooling and water cooling.
1. Wind cooling method:
The wind cooling method uses air as the cooling medium to transfer the heat from the heated parts of the diesel engine. This cooling method consists of a cooling fan and a guide cover. etc. composition.
In order to increase the heat dissipation neps, many corrugated fins are usually cast on the outer walls of the cylinder block, cylinder head and each radiator. When working, the fan rotates to flow the air along the air guide hood to the surface of the cylinder block and cylinder head. When the cold air flows through the heat sink, it takes away the heat given by the cylinder block and cylinder head.
The air-cooled cooling system has a simple structure and reduced weight, but the cooling effect is poor. It is mostly used in small diesel engines and is suitable for areas lacking water.
2. Water cooling method:
The water cooling method uses water as the cooling medium to transfer the 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 the atmospheric pressure. Since the temperature difference between the cooling water temperature and the outside air temperature increases, the heat dissipation capacity of the entire cooling system is improved.
The ventilation of air-cooled generators uses a single fan
(1) in the figure is an expansion joint, and a silencer is connected to the expansion joint. This part is used to The high-temperature and high-pressure exhaust gas generated by the diesel engine after working is discharged into the atmosphere;
(2) in the figure is the air-cooled radiator of the diesel engine. If I read it correctly, this diesel generator set should be a forced air cooling type. This kind of diesel engine has a closed cooling water circulation system. When the diesel engine is running, the heat generated by the cylinder liner and other components as well as the lubricating oil system is cooled by the cooling water. The cooling water that absorbs the heat is cooled by the forced air cooling radiator. The cooled cooling water is then cooled by the cooling water. To cool down the machine, and so on. Under normal operation, the temperature of the cooling water is stable between 75 and 85 degrees. If it exceeds 90 degrees, an alarm will sound. If it exceeds 95 degrees, it will shut down, otherwise the diesel engine will be damaged.
Yes. Air-cooled generators are divided into single-vane type and double-vane type. The single-vane type is mainly used for ventilation and cooling, so air-cooled generators use a single fan for ventilation. Generator refers to a mechanical device that converts other forms of energy into electrical energy. It is driven by a water turbine, steam turbine, diesel engine or other power machinery. It converts the energy generated by water flow, air flow, fuel combustion or atomic nuclear fission into mechanical energy and transmits it to the generator. It is then converted into electrical energy by the generator.