6 Units Man 10L32/44df 4.6mwe 6.6kv 50Hz 33.2MW Dual Fuel Hfo & Gas Fuel Power Plant

• Customization: Available
• After-sales Service: 1 Year
• Warranty: 1 Year
• Type: Basic Diesel Generator
• Installation Method: Fixed
• Stroke: Six Stroke
• Cooling Method: Water Cooling
• Output Type: AC Three Phase
• Speed: Low Speed
• Conditions of Use: Marine
• Usage: Common Units, Standby Unit
• Landuse Type of Unit: Ordinary
• Excitation Mode: AC Rotating Exciter
• Transport Package: 20gp
• Specification: 12300*2350*2550
• Trademark: MAN
• Origin: Germany
• HS Code: 8503009090
• Production Capacity: 50000

Product Description

33.2MW Double Fuel Power Plant Project

1.  Overview

According to customer requirements: 32.2MWe 6.6KV 50Hz dual-fuel power station will be built.
It is operated by 7sets MAN 10L32/44DF 4.6MWe 6.6KV 50Hz dual fuel generating sets
simultaneously.
Power station capacity 7*4.6MW=32.2MW_e
 

1. In dual fuel running mode, the max. gas substitution reaches when engine load is 70%
2. Altitude 1800m, power loss is approx..4-7%
3. Backup solution, if one unit broken or overhaul, other 6 unit start HFO mode

So, 5.4MWe changes to 4.6MWe
  
The main generator set is composed of double fuel engine, main generator and common underframe and ancillary facilities.

Main technical parameters of the gas turbine generator set are as follows:

• Total output power of generation: 32.2MW_e 6.6KV 50Hz
• Model of the generator set: MAN 10L32/44 double fuel turbine generator set
• Number of generator sets: 9sets
• Output voltage of the unit: 6.6KV
• Frequency: 50Hz
• Cooling method:  Pressure water circulating air cooling by airing.
• Fuel:LNG and HFO;

 In order to keep the output power of the engine under full load without any discount or reduction, the natural gas quality shall meet the following specifications:

Characteristic parameter	Unit	Value
Lower heating value (LHV) min.	MJ/m3N)	24
Methane number (MN) min.	---	80
Methane (CH4) min.	Volume ratio %	70
Hydrogen(H2S) max.	Volume ratio %	0.05
Hydrogen (H2) max.2	Volume ratio %	3
Ammonia   max.	mg/m3N	25
Chlorine, fluorine,max.	mg/m3N	50
Particles and solids (engine inlet), max.	mg/m3N	50
Particles and solids (engine inlet), max. size	um	5
Gas inlet temperature	ºC	5~50
Liquid water and hydrocarbons are not allowed at engine inlet

DO/HFO with pretreatment; the basic requirements are as follows: viscosity at the engine inlet port 2.0-12 mm2/s (cSt)

Characteristic parameter	Unit	Value
Viscosity at 40°C	cSt	2.0~12.0
Density at 15°C     max.	kg/m3	890
Sulphur  max.	Quality      %	1.5
Flash point   min.	ºC	60
Sediment   max.	Quality      %	0.1
Pour point (upper), Winter   max.	ºC	-6
Pour point (upper), Summer   max.	ºC	0
Water	Volume    %	≤0.01
Ash	Quality     %	≤0.01

* HFO has a high sulfur content, which will cause accelerated wear of important parts of the engine, and at the same time, the emission of sulfur compounds exceeds the standard.

 Notices for operation on Natural Gas:
-Switching load of gas mode is 30%~70% in generator output
-Natural gas pressure must be kept stable between 6.5 to 8.5 bar (before GVU, pressure volatility
≤±4%/s)










 

2.   Main technical specifications and parameters

          






Table 1   Technical parameters of engine (under standard conditions)
 

Item	Unit	Value
Model of double fuel engine		MAN 10L32/44DF
Rated power of  engine	kW	5200
gas heat rate and fuel consumption	MJ/kwh /g/kwhr	9/188+5%
Number of cylinders	Pcs.	10
Cylinder diameter	mm	320
Stroke	mm	440
Discharge capacity	L	366
Rotating speed	rpm	750
Mean velocity of piston	m/s	10.5
Filling capacity of lubricating oil	m^3(kg)	2.2(1826)
Water filling capacity	m^3(kg)	1.5(1500)
Length ×Width × Height	mm	8800* 1900 *4536
Net weight	kg	65000

Table 2 Technical data sheet of electric generator (under standard conditions)
 

Model		TFC/ZFC
Rated power	kW	4600
Power factor	COSφ	0.8
Frequency	Hz	50
Voltage	kV	6.6
Rotating speed	rpm	750
Allowed overspeed	rpm	120%
Efficiency	%	96
Moment of inertia (flywheel)	kgm^2	590
Weight	kg	16500
Anti-radio jamming grade		N
Structure type		IBM3
Insulation class		F/B
Protection class		IP23
Allowable temperature rises under rater power	^0C	80
Maximum surrounding ambient temperature	^0C	40
Total harmonic distortion	%	3%
Reactance and time constant
xd direct-axis synchronous reactance	%	195.6%
xd¹ direct-axis transient reactance	%	24.4%
xd" direct-axis subtransient reactance	%	16%
Time constant of Td" subransient reactance	sec	0.018
Td time constant	sec	4.187

Table 3 Summary sheet of main technical parameters for generator set
(under standard conditions)

Set model		4600DF
Rated power of generator set	kW	4600
Power factor		0.8
Rotating speed	rpm	750
Heat value of fuel gas	MJ/NM^3	40-45
Intake pressure of fuel gas	kPa	510~980
Exhaust gas temperature	^0C	540
Allowable exhaust back pressure	kPa	4.5
Exhaust gas emission	Nm^3/h	24700
Minimum heat value applicable to gas	MJ/Nm^3	32
Fuel consumption	MJ/kWh/g/kwh	9/192+5%
Lubricating oil consumption	g/kWh	0.4-0.6
Generating efficiency	%	44
Heat efficiency	%	28.2
Overall efficiency	%	72.2
Cylinder diameter/stroke	mm/mm	320/440
Backwater/effluent temperature of cylinder liner water	^0C/^0C	74/82.5
Water volume of cylinder liner	m^3/h	82
Output voltage	kV	6.6
Frequency	Hz	50
Net weight of engine unit	T	91
External dimension of engine unit	m	11.565x2.235x4.78 (Length x width x height)

 

3.   main generator set

The main generator set is composed of double fuel engine, main generator and common under frame and ancillary facilities (electric barring device, oil mist detector, etc.) The side cabinet and instrument cabinet installed at the side of the set are able to display and monitor the working condition and alarm instruction of the engine as well as give orders to engine for real-time control. The startup preparation, start, synchronized grid connection, load control, shutdown and emergency shutdown of the set may carry out on the side cabinet of the set.

Engine is the engine with four strokes, L-type arrangement, exhaust turbine pressurization, air inter cooling, the DO ignites and lean combustion. The engine is equipped with Real Time Intelligent Control System (RICS), and when the gas behavior, outside atmospheric conditions and load conditions are changed, the combustion will be automatically stabilized and be controlled under the optimum conditions.
Compressed air is used for the startup of the engine, and the high-pressure air enters into the cylinders successively in sequence under the control of the main starting valve to drive the piston motion and achieve the startup of the engine. By using such startup mode, sparkles possibly generated in the DC motor startup can be avoided, which is safer under the service environment of the gas.
 The pressure cooling water circulation system of the engine is divided into the primary water circulation (internal circulation of the engine) and secondary water circulation (circulation outside the unit). The cooling water pump of the circulation system is the motor driven gear pump, and the anti-freezing fluid will not be used for the cooling medium. See the water quality requirements in the attached material. Primary circulating water is in closed circulation in the engine interior, mainly for the cooling of high-temperature components, such as cylinder liner of the engine, pressurizer, etc. Air inter-cooler is divided into high temperature section and low temperature section, and the high temperature section is cooled by the primary circulating water. Secondary circulating water from the cooling tower will successively flow through the low temperature section of the air inter-cooler, lubricating oil cooler, primary circulating water cooler for the cooling and heat dissipation of supercharged air, lubricating oil and secondary circulating water. The unit circulation system is equipped with several temperature sensing valves to ensure that the water temperature is controlled within the design range. To adapt to the cold climate in winter of the north, primary water circulation system is installed with cooling water heater (arranged in the auxiliary system of the unit) to ensure that the engine can be started up even under lower temperature.
The friction parts of the moving components in the engine are subject to lubrication, anti-friction, cooling and cleaning by the lubricating oil system of the engine. The lubricating oil is pressurized by the gear lubricating oil pump, which is directly driven by the shafting of the engine, and then flows to the oil sites through the internal camber passages and pipelines of the engine. The internal integration of the common underframe of the engine is equipped with lubricating oil tank, which is served as the oil storage tank and oil return tank of the circulation oil of the lubricating oil system of the engine, so as to meet the daily oil demands of the engine.
The functions of filtration, control and metering, etc. of fuel gas are achieved by the fuel gas system of the engine, and the air-fuel ratio control, power and rotation rate control, etc. are completed together with the electronic control system of the engine. Using Do ignition directly. The gas will enter into the engine cylinder by the gas pipes on both sides of the engine through the gas solenoid electric valve, and then enter into the branch pipe and be mixed with the pressurized air from the pressurizer and air cooler, and finally enter into the cylinder for combustion and power stroke.
      The air inlet pipe of the engine (in front of the pressurizer) is installed with air cleaner and intake muffler. The exhaust of the pressurizer is connected with the exhaust system of the unit by the expansion bellows, and the exhaust will be subject to follow-up treatment and utilization after entering into the exhaust muffler and waste heat pipes. The exhaust manifold in front of the pressurizer of the engine is also equipped with exhaust explosion proof equipment and its exhaust pipe. The explosion proof exhaust pipe is equipped with exhaust muffler, too.
 

the list of standard spare parts

	Dual fuel generator unit

 

No.	Designation	Unit	Qty/Plat	Remark
1	Inlet valve cone, plasma-nitrided	(PIECE)	2
2	Exhaust valve cone, plasma-nitrided	(PIECE)	2
3	Valve guide	(PIECE)	2
4	Pressure spring 8×51×178	(PIECE)	2
5	Pressure spring 12×81×193	(PIECE)	2
6	Inlet valve seat ring	(PIECE)	2
7	Outlet valve seat ring	(PIECE)	2
8	Valve rotating device	(SET)	2
9	Axial bearing	(SET)	2
10	Valve cone piece two-part	(SET)	2
11	Assembly starting valve	(SET)	1
12	Set of gaskets	(PIECE)	4
13	Round seal ring	(PIECE)	9
14	Round seal ring 72.62×3.53	(PIECE)	15
15	Round seal ring 94.92×2.62	(PIECE)	6
16	Round seal ring 59.69×5.33	(PIECE)	6
17	Round seal ring 23.40×3.53	(PIECE)	6
18	Round seal ring 405.26×5.33	(PIECE)	6
19	Round seal ring 18.64×3.53	(PIECE)	6
20	Round seal ring 354.97×5.33	(PIECE)	6
21	Round seal ring	(PIECE)	6
22	37.47×5.33	(PIECE)	6
23	Fire land ring	(PIECE)	1
24	Round seal ring 405.26×5.33	(PIECE)	6
25	Seal ring H=10	(PIECE)	1
26	Upper bearing shell	(PIECE)	1
27	Lower bearing shell	(PIECE)	1
28	Stud screw M42×3	(PIECE)	2
29	Nut M42×3	(PIECE)	2
30	Stop piece	(PIECE)	2
31	Hexagon bolt M24×280	(PIECE)	2
32	Hexagon bolt M24×560	(PIECE)	2
33	Hexagon nut M24	(PIECE)	4
34	Cylinder pin 12m6×32	(PIECE)	2
35	Hexagon bolt M24×180	(PIECE)	12
36	Hexagon bolt M12×80	(PIECE)	4
37	Thrust bearing ring	(PIECE)	2
38	Hexagon bolt M20×180	(PIECE)	8
39	Nut M48×3	(PIECE)	8
40	Gasket	(PIECE)	6
41	Round seal ring	(PIECE)	6
42	Round seal ring	(PIECE)	6
43	Round seal ring	(PIECE)	6
44	seal ring	(PIECE)	6
45	Fuel injection pipe covered	(SET)	1