Altitude Powe Drop Calculation

Generator manufacturers use diesel engines in accordance with ISO3046 standards.

The power data of the diesel engines in the generator sets in kW are generally given for a height of 1000 meters. In this article, we will give information about what kind of engine should be selected in elevated places and how much power loss must be expected.

Generally, as all internal combustion engines reach high altitudes, their efficiency decreases.

All generators lose 1000% (304,8 m.), 3.5% power regardless of brand. The power loss is not calculated for the first 500 feet.

For example, if your generator set produces 100 kVA of power at sea level, 1853 m. (6.079 ft) height in Erzurum, how many kVA will produce this formula to calculate.

6079 – 500 = 5.579.00 ft. / 1.000 = 5,579 x 3,5% = 19,52%

Generating 100 kVA power at sea level, the generator will generate 80.48 kVA power in Erzurum.

It is important that Turbo motors should be preferred at high altitudes. The loss of power in nonturbo engines will be much higher.

When we consider that most of the engines below 50 kVA are naturally aspirated, rather than turbo, we have to make our choice of generators for high altitude places via generators with turbo suction system.

For generators with larger power, it is possible to keep the efficiency at the highest level with motors with electronic governor. The efficiency decrease is more in the motors with mechanical governor.

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