Working Conditions of Weichai Diesel Engine for Power Generation

Jun. 11, 2019

3.10 Power Definition and Working Conditions of Weichai Diesel Engine for Power Generation

3.10.1 Power definition

Continuous Power COP

In unlimited annual running time of diesel engine, the maximum power acquired when the engine is running continuously under constant load.ISO standard power.

Normal Power PRP

In unlimited annual running time of diesel engine, the maximum power acquired when the engine is running continuously under variable load. ISO standard power which can overload by 10%.

Standby Power ESP

Maximum power in some variable power series with annual running time of diesel engine up to 200h.ISO standard power with limited fuel volume.

3.10.2 Running Conditions and Applications of Power

Running conditions and applications of different powers of diesel engine are as shown in Table 3-1.

Power Classification	Running Condition	Application
Continuous Power COP	1. Unlimited annual running time; 2. Running under constant 100% load; 3. Incapable of overload running.	Can be used for running under the condition of high-temperature and plateau.
Normal Power PRP	1. Unlimited annual running time; 2. In every continuous period of 250h, average load rate shall not exceed 70%; 3. Annual running time under 100% load shall not exceed 500h; 4. Running time within 12h under overload by 10% can be 1h, and annual accumulative total running time does not exceed 25h.	Used for the condition that power output has been appointed, for example, such as utility power reduction. The gen-set can be synchronized to the public utility power grid.
Standby Power ESP	1. Annual running time does not exceed 200h, including annual running time under 100% load below 25h; 2. In every running cycle of 24h, average load rate shall not exceed 80%; 3. Incapable of overload running. 4. For start-up of diesel engine, there is no process of engine heating, it takes 10s to finish the acceleration from start-up to rated speed. When ambient temperature is below 5°C, for naturally aspirated diesel engine, preheating facility should be added to ensure the outlet water temperature of diesel engine is above 30°C;When ambient temperature is above 5°C, no need for preheating facility.For supercharged diesel engine, when ambient temperature is below 10°C, preheating facility should be added to ensure the outlet water temperature of diesel engine is above 30°C; When ambient temperature is above 10°C, no need for preheating facility.	Provide emergency power supply during power supply outage.

20KW 25KVA Weichai Diesel Engine Main Technical Parameters
Diesel Model	WP2.3D25E200
Type	In-line, 4-Strokes, Water cooled, naturally-aspirated
No. of cylinders / valves	4/8
Bore/Stroke	89mm/92mm
Displacement	2.289L
Continuous Power	18.4 KW
Rated Power	23 KW
Overload Power	25 KW
Rated Speed	1500r/min
Idle Speed	750±20 r/min
Fire Sequence	1-3-4-2
Crankshaft Rotating Direction	Counterclockwise facing flywheel
Starting method	DC12V Electrical Start
Starting motor Power/voltage	3.5kW/12V
Governing control	Mechanical speed governor
Cooling mode	Closed water cooled
Min. coolant temperature of engine working	Min. coolant temperature of engine working 40℃
Coolant capacity	5L
The capacity of oil sump	8L(follow the oil dipstick)
Net weight (kg)	230±50
Size of shape (length×width×height) mm
Main performance parameters
Steady governing rate	mechanical≤5%
Fuel consumption at rated working condition	≤224g/kW·h±3%
Consume ratio of oil and fuel	≤0.1%
Recommended used diesel engine parameters
Power output	SAE4＃flywheel housing/7.5’flywheel
Number of teeth	104
Air filter flow	240m³/h
Min. diameter of intake pipe	50mm
Min. diameter of exhaust pipe	50mm
Max. exhaust back pressure	8kPa
Max. exhaust temperature (After the turbocharger)	650℃
Lowest oil pressure aiarm value/highest alarm value	80/850 kPa

Ambiance condition

The diesel engine should be able to output rated power in the following conditions.

Atmospheric pressure, PX:100kPa (or 0 meter above sea level);

Ambiance temperature , Tr: 298K(25℃);

Relative air humidityΦr: 30%

The diesel engine should be able to work continuously and reliably in the following conditions:

Range of ambiance temperature: -30℃≤T≤50℃;

Relative air humidity: the max relative humidity is 90% of the wettest month in a year(It means that the lowest average temperature of this month is 25℃).

The working environment should be without explosive gas and electric mote.

The customer should illuminate in advance if there has any especial and dangerous condition at the working space (for example, explosive and flammable gas).

Starlight can provide 20kw to 1000KW Weichai diesel generator with Stamford/Marathon/Engga/Leroy-Somer/Shanghai KEPU alternator optional. Weichai has sales service centers in many countries. It is easy to get spare parts when needed.