Calculation formula of diesel engine power

Nf= (PH/n+Pe)/Ki, where Nf is the minimum output power of diesel engine, kW; Ph- output power of the unit, kW; Pe- rated power rolling kW of diesel engine under standard environmental conditions; K1-diesel engine power correction coefficient (when the diesel engine runs for a long time, (K 1=0.9, the continuous working time of the diesel engine at this time)

P=n*M/9550 (mainly used for testing); N, rotational speed rpm；; M, torque n.m.

Extended data:

Diesel engine characteristics

1. Because the frequency of alternating current is fixed at 50Hz, the rotating speed of the unit can only be 3000, 1500, 1000, 750, 500, 375, 300r/min, and most of them are 1500r/min.

2. The output voltage of diesel generator is 400/230V (large unit 6, Doitz generator 0.3 kV), the frequency is 50Hz, and the power factor is 8.0cos=φ.

3. Wide power variation range. The power of diesel engines used for power generation ranges from 0.5 kilowatts to tens of thousands of kilowatts. The power of diesel engines used for power generation in general mobile power stations, standby power sources, emergency power sources or rural common power sources is within the range of 12~ 1500kW. Fixed or marine power stations are commonly used as power sources, and the power can reach tens of thousands of kilowatts.

4. Have a certain power reserve. Diesel engines for power generation generally operate under stable working conditions with high load rate. Emergency and standby power supply are generally rated as 12h power supply, and ordinary power supply is rated as continuous power supply. The matching power of the unit should be deducted from the transmission loss and excitation power of the motor, and a certain power reserve should be left, so the matching power of the unit should be divided by the matching ratio and the matching characteristics of various diesel generator sets.

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