Why do diesel generators have altitude restrictions?

As to why there is an altitude limit for using a diesel generator, know that with a naturally aspirated diesel engine, the combustion conditions deteriorate due to insufficient intake air, and the diesel engine cannot reach the normal rated power. Diesel generators are marked with an altitude range of use. If the number exceeds this range, then a large diesel generator must be selected to constitute a diesel generator when the diesel generator has the same power.
As the altitude increases, the ambient temperature is also lower than that of the plains. Typically, the ambient temperature drops by about 0.6°C for every 1000m increase. In addition, due to the thin air in the plateau, the starting performance of the diesel generator diesel engine is worse than that in the plain area. When in use, the user should take auxiliary starting measures corresponding to low temperature starting.
In addition, due to the increase of altitude, the boiling point of water decreases, the wind pressure of cooling air and the quality of cooling air decrease, and the heat per kilowatt per unit time increases, so the heat dissipation condition of the cooling system is worse than that of the plain. In general, open cooling loops are not recommended at high altitudes. When used on plateaus, a pressurized closed cooling system can be used to increase the boiling point of the coolant.
Therefore, if a diesel generator is used in a special altitude area, it is not suitable to use a normal diesel generator. When purchasing, consult the salesperson of the diesel generator manufacturer.

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Post time: May-10-2022