Several Technical Questions and Answers of Yuchai Generator 2000kW

Several technical questions and answers about Yuchai generator 2000kW.

1. What systems does the basic equipment of Yuchai diesel generator set include?

Answer: the diesel generator set mainly includes six systems, namely: (1) oil lubrication system; (2) Fuel system; (3) Control and protection system; (4) Cooling and heat dissipation system; (5) Exhaust system; (6) Start the system.

2. What is the relationship between apparent power, active power, rated power, power and economic power of diesel generator set?

Answer:

(1). The unit of apparent power is KVA, which is used to express transformer and UPS in China. Its basic function is: the capacity of uninterrupted power supply when the municipal power supply is interrupted.

(2). The active power is 0.8 times of the apparent power, and the unit is kW. China is used to power generation equipment and electrical equipment.

(3). The rated power of diesel generator set refers to the power that can operate continuously for 12 hours.

(4). The power is 1.1 times the rated power, but only 1 hour is allowed within 12 hours.

(5). The economic power is 0.75 times of the rated power, which is the output power of diesel generator set that can operate for a long time without time limit. When operating at this power, the fuel is saved and the failure rate is low.

3. How to calculate the operating power (economic power) of the generator set?

Answer: P = 3 / 4 * P (i.e. 0.75 times of rated power)

4. What is the power factor of the three-phase generator? Can a power compensator be added to improve the power factor?

A: the power factor is 0.8. No, because the charge and discharge of the capacitor will cause small power supply fluctuation and unit oscillation.

5. Why is it necessary to change the oil and oil filter after the new machine has been used for a period of time?

A: it is inevitable that impurities will enter the oil pan during the running in period of the new machine, resulting in physical or chemical changes in the oil and oil filter.

6. Why is the smoke exhaust pipe inclined downward by 5-10 degrees when installing diesel generator set?

A: it is mainly to prevent rainwater from entering the smoke exhaust pipe, resulting in major accidents.

7. Why is it required that the use site of diesel generator set must have smooth air?

A: the output of the diesel engine is directly affected by the amount and quality of air inhaled, and the generator must have sufficient air for cooling. Therefore, the use site must have smooth air.

8. How to identify fake and shoddy domestic diesel engines?

A: first check whether there is factory certificate and product certificate. They are the 'identity certificate' of diesel engine factory, which must be available. Recheck the three numbers on the certificate:

(1). Nameplate number;

(2). Body number (in kind, it is generally on the plane machined at the flywheel end, and the font is convex);

(3). Nameplate number of oil pump. Check these three numbers with the actual number on the diesel engine, and they must be accurate. In case of any doubt, these three numbers can be reported to the manufacturer for verification.

9. Why not allow the diesel generator set to operate for a long time when it is lower than 50% of the rated power.

Answer: if it is lower than 50% of the rated power, the oil consumption of diesel generator set will increase, the diesel engine will be easy to deposit carbon, increase the failure rate and shorten the overhaul cycle.