Gas Generator 3.5 MW With Two Years Warranty

  • Gas Generator 3.5 MW With Two Years Warranty Manufacturers, Gas Generator 3.5 MW With Two Years Warranty Factory, Supply Gas Generator 3.5 MW With Two Years Warranty
  • Gas Generator 3.5 MW With Two Years Warranty Manufacturers, Gas Generator 3.5 MW With Two Years Warranty Factory, Supply Gas Generator 3.5 MW With Two Years Warranty
Gas Generator 3.5 MW With Two Years Warranty
  • CNPC JCPC
  • China
  • 5-8 Months or negociated
  • 200 sets/year

1. We have natural gas generator ranges from 300kw to 5000kw. This generator was mainly designed to meet the demand for long-distance pipeline compressor, offshore drilling plantform, large-scale gas power station and etc.

2. The gas generator has the features of high pressure, high power, high efficiency, low emission etc.

3. The gas generator thermal efficiency is more than 44%.

4. Knock control technology and explosion pressure monitoring.

5. Service center in South America and some other country

1.1 Genset brief introduction

3500kW natural gas generating sets (3500GF-T) are powered by model 16V26/32T gas engine produced by our company.

 

It has the features of accurate voltage regulating, good dynamic performance, less voltage waveform distortion, high efficiency, compact structure, easy to maintain, low speed, good reliability, long life operation and cost-effective.

 

1.2 Genset technical parameters

Model of genset

3500GF-T

Model of engine

16V26/32T

Coupling method

Flexible coupling

Rated speed

900 (r/min)

Rated power

3500/4375 (kw/kva)

Rated voltage

6300/11000 (v)

Rated frequency

60 (hz)

Rated power factor

0.8 lagging

Voltage regulation

Automatic

Supply connecting

3 phase 3wire

Governor

HEINZMANN(GERMANY)

Control model

Remote electric control, Hand control

Starting method

Pneumatic starting motor

Cooling method

Water cooling system with upstanding radiator

Overall dimension

L×B×H

9400×2900×3700 (mm)

Net weight

70000 (kg)

 Section2. Gas engine

2.1 Engine brief introduction

The 26/32 series natural gas engineprovided by our company is heavy duty designed, four-stroke cycle, stationary type, water cooled and of the manufacturer‘s qualified design for continuous operation required. The 26/32 series natural gas engine is exhaust turbine,16cylinders, V-type engine.

The crankshaft, flywheel, piston connecting rod and other related reciprocating parts are balanced and the engines provide counterweights to ensure minimum practical unbalanced forces and moments.

 

The engines assembly includes parts, accessories and auxiliary equipment required for installation and satisfactory operation, under specified operating conditions. All designed and constructed of materials are suitable for the service requirements and arrangements could minimize fire hazards and vibration damage.

 

The 26/32 series natural gas engine features high power density, high efficiency, light weight, compact structure, long overhaul period, and maintenance-friendly design. The engine adopts multi-point injection technology, and the combustion organization method is injected into the main combustion chamber after being ignited by the pre-chamber gas to increase the ignition energy, and the Miller cycle and air-fuel ratio are precisely controlled to achieve lean combustion. Through the mechanical check valve, the pre-chamber inlet air is controlled and the check valve opening pressure is 130 mbar. With the new engine control system, the engine's air-fuel ratio control, knock detection and misfire detection, and engine operating parameter detection and safety are achieved, and could meet HSE requirements.

 

2.2 Technical parameters of gas engine

Model of engine

16V26/32T

Rated Power

3780 (kw)

Rated Speed

900 (r/min)

No. and layout of cylinders

16-cylinder, V-type

Type

Four stroke, water cooled, turbocharged and after-cooled, pre-combustion chamber, spark plug ignition, mix before compressor, multi-point injection

Type of combustion

Lean burn

Brand of turbocharger

ABB

Gas inlet pressure

4~6 (bar)

Gas consumption

≤0.23 (nm3/kwh)

Specific oil consumption

≤0.5 (g/kwh)

Thermal efficiency

44%

Type of lube-oil

KCN 7805 (sulfur content<=200mg/m3)

KCN 7810 (sulfur content <=460mg/m3)

Oil sump capacity

1760 (L)

Idle speed

400 (r/min)



Bore

260 (mm)

Stroke

320 (mm)

BMEP

16.5 (bar)

Total displacement

272 (L)

Noise

115 (db)

Exhaust temperature(before turbine)

≤620 ()

Direction of rotation

Counter-clockwise(facing to flywheel)

Emission

0.5@5%O2 (g/nm3)

Lubrication method

Pressure and splash lubrication

Overhauling

≥40000 (h)

Manufacturer

CNPC Jichai Power Company Limited

 

According to the standard of GB/T 6072 (idt ISO 3046), The standard environment conditions are: atmospheric pressure: 100kPa, relative humidity: 30%, ambient temperature: 25 degrees Celsius, low heat value of gas: 36MJ/Nm3, max. load,. Otherwise, the engine power shall be corrected through conversion.

 

Section3. Alternator

3.1 Alternator brief introduction

Our generator use JFG series high voltage alternatorthe alternator conform to applicable IEC 60034-1 requirements, GB755 standards.

 

JFG series generator has degree of protection IP23 and adopts IMB20 installation type.

 

The generator comprises the main machinerevolving-field machine with cylindrical rotor and damper windings,exciter(revolving armature machine)and excitation equipment. The excitation system mainly adopts currently the world’s most advanced DECS100 or UNITROL 1000 digital automatic voltage regulator which is produced by BASLER company or Switzerland ABB company, By using the permanent-magnet auxiliary exciter system, the main generator, the permanent-magnet auxiliary exciter and digital automatic voltage regulator perfectly matched that constitutes the high quality and excellent-performance generator.

 

3.2 Technical parameters of alternator

Main technical parameter

Type

JFG series

(SIEMENS Technology)

Rated power

3500/4375 (kw/kva)

Rated voltage

6300/11000 (v)

Rated frequency

50 (hz)

Power factor

0.8 (lagging)

Excitation model

Brushless

Wiring method

3 wire, 3 phase, star type

Number of pole

8

Rated speed

900 (r/min)

Voltage regulator

ABB, Unitrol series

Excitation mode

Brushless excitation, PMG

Insulation class

Class F

Protection class

IP23

Cooling

Fan cooling(IC01)

Duty

Continuous work(S1)

Bearing type, No.

Rolling bearing, 2 Pcs

Installation method

IM B3

Moment of inertia

360 (kg.m2)

Efficiency

97%

Machine weight

12100 (kg)

Winding temperature measurement

PT100, 2 units per phase,  one use and one standby

Bearing temperature measurement

PT100, 1 unit for front and rear bearing

Anti-condensation heater

AC220V/315W, 1 pc

Main performance index

Stable voltage regulating rate

Single running: ±1%

Parallel running: ±2.5%

Instantaneous voltage regulating rate

-15%~+20% UN

Waveform distortion rate

2%

Over load

1 hour operation time at 110% rated power (6 hours as a cycle)

Unbalance load

0.2

Over current multiple

1.5IN, 2 minutes

Ability of maintain short-circuit current

The excitation system can provide continuous current of two times of rated current, duration 5s, the alternator must be unloaded.

Short circuit calculation parameters

Direct-axis synchronous reactance

Xd=2.52

Quadrature-axis synchronous reactance

Xq=2.50

Direct-axis transient reactance

Xd’=0.187

Direct-axis subtransient reactance

Xd’’=0.094

Quadrature-axis subtransient reactance

Xq’’=0.113

Negative sequence reactance

X2=0.103

Zero sequence reactance

X0=0.052

Stator winding resistance

r1=0.009

Direct current component time constant

Ta=0.036s

Transient component time constant

Td’=0.148s

Subtransient current time constant

Td’’=0.003s

Short circuit ratio

KC=0.45


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