In actual use, many users do not pay attention to the working environment of diesel generating units, resulting in low unit operating efficiency, and no reason can be found. In fact, the engine room must have sufficient air flow to meet the combustion and cooling and ventilation requirements of the unit. Therefore, the cooling and ventilation of diesel generators is very important. Today Starlight will introduce the cooling and ventilation requirements of diesel generators .
1. Cooling requirements
1) When the unit is installed, the radiator should be as close to the exhaust port as possible to prevent the recirculation of hot air. When there is no air duct, it is recommended that the distance between the radiator and the air outlet is no more than 150 mm; if the equipment room cannot meet the above requirements, it is recommended to install a corresponding air duct.
2) The area of the exhaust vent should be 1.5 times the area of the radiator exhaust. Generally, it is necessary to install the air duct and the exhaust shutter with the radiator.
3) The bend of the air duct should pass through the appropriate elbow. If the pipe is too long, the size should be increased to reduce the exhaust air back pressure. Long-distance duct mufflers should be specially designed according to the characteristics of the building.
4) Shutters and grilles are usually installed at the air inlets and exhausts of the building. When calculating the size of the air outlets, the effective ventilation area of the shutters and grilles should be considered.
5) A large amount of air is required for the combustion and cooling of the unit, which is often overlooked. It is recommended that the total area of the air inlet is at least twice the heat dissipation area of the unit; all air outlets should be able to prevent rainwater from entering.
1) Air dampers or shutters isolate the machine room from the surrounding environment. The opening and closing operations should be controlled by the operating status of the unit.
2) The movable dampers installed in the machine room in cold areas should allow the airflow in the machine room to recirculate to heat the machine room when the machine is cold, thereby improving the utility of the unit.
In areas with a cold climate, not only should we pay attention to the cooling and ventilation of diesel generators , but also make corresponding insulation measures for standby and rarely-run units. It should also be noted that, for a standby unit that is automatically put into operation when the main power supply fails, it is usually necessary to install a standard thermostatically controlled immersion cooling water heater.