With the rapid development of diesel in China, the use of diesel generator sets is becoming more and more extensive, especially in plateau areas where diesel generator sets are needed for power supply. The normal use altitude of diesel generator sets is below 1500 meters. So, what problems will occur after it reaches above 1500 meters?
1. Due to the low air pressure in the plateau area, the air is thin and the nutrient content is low. Especially for naturally aspirated diesel generators, the combustion conditions deteriorate due to insufficient intake, so that the diesel generator cannot issue the original rated power. Even if the diesel generators are basically the same, the rated power of various types of diesel generators is different, so their ability to work in the plateau is different.
Considering the tendency of delayed ignition under plateau conditions, for the economical operation of diesel generators, it is generally recommended that the fuel supply of naturally aspirated diesel engines should be appropriately advanced.
Due to the increase in altitude, the power decreases and the exhaust temperature rises. Therefore, when selecting a diesel generator, users should also consider the plateau working ability of the diesel engine and strictly avoid overload operation.
According to experimental results in recent years, for diesel engines used in plateau areas, the exhaust gas turbocharging method can be used as power compensation for the plateau. Exhaust gas turbocharging can not only make up for the lack of plateau power, but also improve smoke color, restore power performance and reduce fuel consumption.
2. With the increase of altitude, the ambient temperature is also lower than that in plain areas. Generally, the ambient temperature will drop by about 0.6 degrees Celsius for every 1000M increase. In addition, due to the thin air in the plateau, the starting performance of the diesel generator is worse than that in the plain area. When using, users should take auxiliary starting measures corresponding to low-temperature starting.
3. Due to the increase in altitude, the boiling point of water decreases, and the wind pressure and cooling air quality of the cooling air decrease, as well as the increase in heat dissipation per kilowatt per unit time. Therefore, the heat dissipation conditions of the cooling system are worse than those in the plains. Generally, it is not appropriate to use an open cooling cycle in plateau altitude areas. A pressurized closed cooling system can be used to increase the boiling point of the coolant when used in the plateau.
