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Technical Proposal of 10MW Gas Turbine from China
1. Brief introduction of 10MW gas turbine
10MW gas turbine is co-developed by Our Group on the basis of gas turbine design and manufacturing. It is the first new type of medium power gas turbine with fully independent intellectual property rights in China . Its gas generator is derived from �Kunlun �aero-engine which is self-designed and developed by China , and the design of power turbine adopts much advanced and mature technology. There applied technology is compatible to that of the international reputable gas turbine producers, such as GE and Siemens.
We began to build a cogeneration demonstrative plant of unit 10MW in the second production factory of Zhongyuan Oil Field in 2002, which realized interconnected generation and was placed in operation on July 28, 2003 . The successful delivery of the unit filled in the blank in the field of light gas turbine 12MW development of our nation.
2. Main technical parameter of unit (under ISO condition)
2.1 Heat performance of unit Base load Peak load
Rated generating power(KW) �1500 �3200
Heat efficiency of unit 27% 27.8%
Heat rate KJ/KW.h 13333 12950
2.2 Performance of gas turbine Base load Peak load
Air flow at the compressor inlet (kg/s) 60.07 62.45
Compressor boost ratio 11.76 12.47
LP rotor speed (rpm) 10174 10200
HP rotor speed (rpm) 11791 12008
Power turbine speed (rpm) 4700 4700
Gas flow at power turbine inlet (kg/s) 60.47 62.94
Gas temperature at power turbine outlet (K) 767 787
Rotation direction of power turbine rotor CW(viewed from the direction of air-inlet)
Pressure at exhaust scroll case outlet (105Pa) 1.013 1.013
Flow speed at exhaust scroll case outlet (m/s) 41 43
Area of exhaust scroll case outlet (m2) 3.2671
2.3 AC generator
Rated power 15000kW
Rated speed 3000r/pm
Rated voltage 6.3kV
Rated power factor 0.8
Frequency 50Hz
Efficiency �7%
Cooling method Upper water cooling
Rotation direction CW (viewed from excitation)
2.4 Gas turbine first overhaul period
Gas generator no less than 6000 hours
Power turbine no less than 40000 hours
3. Main components of unit
3.1 Gas generator and power turbine
10MW gas turbine is composed of gas generator, power turbine and other auxiliary systems.
Gas generator mainly consists of compressor, combustion chamber, turbine and other auxiliary sections. Compressor has LP and HP compressors in structure, consisting of 7stages HP and 4 stages LP compressors. The annular combustion chamber features small dimension, lightweight, high combustion rate and low contamination, consists of 15 heads, 15 fuel nozzles and 2 igniters.
The turbine also has LP and HP turbines in structure. It has 1 stage HP and 1 stage LP turbine respectively. Power turbine has 2 stages.
3.2 Reducing gearbox
The function of reducing gearbox is to reduce the power turbine speed from 4700rpm to 3000rpm to drive the generator. The big and small gears in gearbox are arranged up and down in the same vertical plane and the center distance of high- and low-speed shafts is 540mm. The max. load is 15000kw.
3.3 AC generator
Thermal energy is changed into mechanical energy through the gas turbine, and then transformed into electric energy through generator and merged into electric power network at last. The generator is a brushless excitation generator and adopts closed cycle air cooling, which rated power is 15000kW, power factor is 0.8, output voltage is 6.3kV, frequency is 50Hz and speed is 3000rpm, cooling of the motor is upper water cooling. The generator consists of rotor, stator, pedestal, cooling air intake and exhaust duct and water cooler. Rotor has driving end and excitation end, and two gliding gears support the two ends, main lubrication system supplies oil lubrication and cooling during starting and running.
4. Auxiliary systems of unit
4.1 Lubrication system
Two sets of independent lubrication oil system are equipped on the gas turbine, that is, lubrication system of gas generator and lubrication system of generator, gearbox and power turbine (main lubrication system). The function of the lubrication system is to supply enough clean oil with appropriate temperature and pressure to the bearings of gas generator, generator, gearbox and bearings of power turbine during starting, normal running and stopping of the unit.
4.2. Fuel supply and regulating system of natural gas
The function of this system is to supply certain temperature natural gas with stable pressure in order that gas generator can burn with an applicable gas flow to supply the energy for the unit. It consists of two parts: the first one is fuel regulating system, which is made up of fast cut-off valve, electromagnetic evacuation valve, fuel control valve and control device etc. forming an independent skid enclosure, which is installed on the pedestal of gas turbine cell. The second one is fuel supply system which consists of general valve, filter, independent-type pressure regulating valve, evacuation valve, flow meter, sensor of temperature, pressure and flow as well as gas pipe etc. The upstream terminal of this system is the outlet of natural gas compressor and the downstream terminal is the inlet of gas generator fuel regulating system.
4.3 Main technical data of fuel supplying system
(a) Max. flow at base load 4880Nm3/h
(b) Max. flow at peak load 5300Nm3/h
(c) Natural gas pressure range at regulating system inlet 1.3ï½?.5MPa
(d) Natural gas inlet temperature of supplying system 30ï½?0â„?
(e) Natural gas contaminant:
The diameter of hydrocarbon drop not more than 8µm;
The diameter of solid grain not more than 3µm;
No moisture that can form ice
4.4 Air intake and exhaust system
4.4.1 Air-inlet filter silencing system
The function of the air-inlet filter silencing system is to filter ventilating air entering into gas generator and the enclosure of gas turbine cell, prevent dust absorbed and lower the noise sent out from the front part of gas generator.
4.4.2 Main parameter of air intake system
(a) air flow at air intake of gas turbine 62.45kg/s
(b) ventilation amount of enclosure 6Nm3/s
(c) permissible pressure loss 1000Pa
(d) final dust amount less than 0.5mg/m3
(e) initial drag of air filter 250Pa
(f) Max. pressure differential of air filter 700Pa
(g) back blowing compressed air flow 0.3Nm3/min
(h) back blowing air pressure 0.6-0.8Mpa
4.4.3 Structure of air intake device
The device mainly consists of filtering device, silencer, back blowing system, duct and air intake pressure-stabilizing chamber. It has a huge volume and is mounted on the steel support in front side of unit enclosure. This belongs to overhead arrangement.
(a) Air intake filtering device
Air intake filter is a case structure welded by steel plate. It has good seal and high strength structure. There are equipped 196 high effective filtering elements and Venturi tube fixed on steel support in the enclosure. The profile dimension is 6450mm×6450mm×3400mm.
(b) Silencer
The silencer is diaphragm type structure. Its features are light in weight, small dimension, low cost, simple manufacture and good silencing effect. The profile dimension is 3200mm×2200mm×2500mm.
4.4.4 Exhaust system
The function of the exhaust system is to exhaust the gas from exhaust scroll case of gas turbine into atmosphere. It consists of expansion joint, silencer, chimney, support and etc. The support is fixed on the cement foundation by bolts. The height from ground to rainproof cover is about 20m.
4.5 Cleaning system
The cleaning system operates through the water solution with certain composition ratio of cleaning agent sprayed from the nozzles on nozzle ring of gas turbine at suitable pressure, temperature and flow condition. The system consists of clean water tank, cleaning agent tank, corrosion-proof liquid tank, solenoid valve, filter of centrifugal pump, shut off valve and hose to form into an independent skid enclosure. The off-line cleaning is adopted on this unit (that is, perform cleaning when the gas turbine is not operated).
4.6 Carbon dioxide fire extinguishing system
This system consists of thermo induction fire detector, carbon dioxide cylinder control valve, drive steel cylinder, fireproof flap, control cabinet, pipeline and sprinkler head etc. Control cabinet is mounted in the central control chamber; assembled carbon dioxide cylinder is mounted in the steel support of air intake device.
4.7 Ventilation and heat systems of enclosure
Gas turbine cell and generation cell in the enclosure is closed, its walls and roof is made from thermal-protective and silencing material. It is necessary to have an air-cooling device to ensure the temperature in the enclosure not too high during the unit running. The ventilation of gas turbine cell is finished by directly inducing air filtered by air intake device through air inlet in the enclosure roof to absorb the heat in the cell, then the air exhaust to atmosphere through two outlets in the rear of the cell roof. It is required to remain negative pressure not more than 1000Pa (100mmH2O), temperature is at 60â„?or so in the cell. When the temperature is more than 60â„?in the cell, two fans work at the same time to ensure the temperature not more than 100â„?in the enclosure.
When the unit stops running and the temperature of enclosure drops to 5â„? the temperature switch is shut off and heater begins to work. When the temperature is more than 15â„?the heater stops working.
4.8 Hydraulic starting system
The function of this system, on one hand, it provides the start power for gas turbine, and on the other hand it runs the gas generator during water cleaning. It consists of oil tank, oil pump, oil pump assembly, motor, and oil filter etc. The profile dimension of hydraulic station skid enclosure is 2250mm×2300mm×2100mm.
4.9 AC and DC electrical system
This system consists of power cabinet, power distribution cabinet, motor control center, accumulator and charger, etc. The function of motor control center is to supply alternating current to AC motor, heater, illumination and control system for various purposes. DC system supplies DC power to emergency oil pump, emergency lighting and control system. Charger is used to charge accumulator. All of these devices are mounted in the central control chamber.
4.10 Control system
The control system of the unit is mounted in an independent enclosure, forming a central control chamber; its concrete position can be designed on the basis of site conditions.
5. Scope of Supply of Single 10MW Gas Turbine Generator Set
5.1 Gas Generator and Power Turbine
5.2 Decerelator Gearbox
5.3 Auxiliary Equipments
5.4 Lubrication Oil System
5.5 Natural Gas Feeding System and Regulator
5.6 Air Intake and Exhaustion System
5.7 Cleaning System
5.8 Carbon Dixon Fire Extinguish System
5.9 Enclosure Ventilation and Heating Systm
5.10 Hydraulic Starting System
5.11 DC&AC Generator
5.12Control System
6. Supply Scope of Combined Cycle of 10MW Gas Turbine Generation Set
Combined Cycle of 10MW Gas Turbine Generation Set is comprised of 10MW gas turbine generation set, heat recovery boiler, steam turbine generation set and other required auxiliary equipments.
6.1 Main Parameters of10MW Gas Turbine Generation Set（ISO condition�
6.1.1 Gas Turbine
Rated Powet（KW�nbsp; �1500
Heat Efficiency 27%
Heat Consumption KJ/KWh 13333
Air Intake flow of Compressor（kg/s�nbsp; 60.07
Boosting Ratio of Compressor　€ã€€€ã€€€ã€€nbsp; 11.76
LP Rotor Speed(rpm) 10174
HP Rotor Speed(rpm) 11791
Power Turbine Speed(rpm) 4700
Air Intake Flow of Power Turbine（kg/s�nbsp; 60.47
Temp. at Exit of Power Turbine（K�nbsp; 767
Revolving Direction of Rotor of Power Turbine Clockwise(View from Air Intake)　
Pressure at Exit of Exhaust Scrollï¼?05Paï¼?nbsp; 1.013
Velocity at Exit of Exhaust Scroll(m/s) 41
Area at Exit of Exhaust Scroll(m2) 3.2671
Gas Generator No Less than 6000 hours
Power Turbine No Less than 40000 Hours
6.1.2 AC Generator
Rated Power 15000kW
Rated Speed　€ã€€nbsp; 3000rpm
Rated Voltage 6.3kV
Power Factor 0.8
Efficiency �7%
Cooling Type Up side water cooled
Revolving Direction Clockwise from view of Exciting
6.2 Heat Recovery Boiler
Pressure of HP Steam MPaï¼?nbsp; 5.8
Temp. of HP Steam â„? 455
Flow of HP Steam t/h: 20.6
Pressure of LP Steam MPa: 0.42
Temp. of LP Steamâ„? 148
Flow of LP Steam t/h: 3.4
Boiler Exhaust Temp. â„? 146
6.3 Steam Turbine Generation Set
Steam Turbine Rated Power kW: 4500
Rated Steam Flow t/h: 20.6
Rated Intake Steam Temp.â„? 450
Rated Intake Steam Pressure MPa: 5.5
Exhaust Pressure KPa: 6.0
Output Voltage of Generator kV: 10.5
The output of high pressure steam from the heat recovery boiler is 20.6t/h, dual pressure boiler is adopted. Low pressure steam is used in the deaeror. Steam turbine is fo signle pressure condensing type.
The unit output of a combimed cycle 10mw gas turbine generation set is 16MW, and the set’s generation efficiency rate is 40%.
7. Quotation in USD
7.1 Single Cycled 10MW Gas Turbine Generation Set
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Item |
Price |
Remark |
|
1 |
Gas Turbine Generation Set |
4,537,500 |
　 |
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1.1 |
Gas Generator |
1,815,000 |
　 |
|
1.2 |
Power Turbine |
756,250 |
　 |
|
1.3 |
Control System |
453,750 |
Imported |
|
1.4 |
Auxiliaries |
1,512,500 |
　 |
7.2 Combined Cycle of 10MW Gas Turbine Generation Set
|
　 |
Item |
Price |
Remark |
|
1 |
Gas Turbine Generation Set |
4,537,500 |
　 |
|
2 |
Thermal System |
756,250 |
　 |
|
2.1 |
Heat Recovery boiler |
529,375 |
Medium Pressure Boiler |
|
2.2 |
Bypass System |
226,875 |
　 |
|
3 |
Steam Turbine Genset |
756,250 |
　 |
|
4 |
Auxiliaries |
1,270,500 |
　 |
|
4.1 |
Fuel feeding system |
423,500 |
　 |
|
4.2 |
Water Supply and treatment |
151,250 |
　 |
|
4.3 |
Cooling water system |
151,250 |
　 |
|
4.4 |
Fire Protection |
75,625 |
　 |
|
4.5 |
Inplant Waste water treatment |
75,625 |
　 |
|
4.6 |
Electrical system（including plant transformer� |
393,250 |
　 |
|
5 |
Other Equipments |
151,250 |
　 |
|
6 |
Total |
7,471,750 |
　 |
8. Service and Warranty
8.1 Onsite supervison for commissioning is available at cost undertook by the buyer for air ticket, accommodation and boarding, as well as daily allowance. We can offer six months of onsite operation and maintenance work and also training buyer’s personals for the whole set. But due to security reasons we do not provide technicians or supervisors to plant site’s country areas, we can invite the employers�personals to China for training at the buyers�fee.
8.2 For defaulted gas turbine can be returned for repairing.
8.3Warranty period of the gas turbine, gearbox, generator and gas turbine’s main auxiliaries is one year.
8.4 We can also offer onsite installation and commissioning services at competitive quotation on the condition that we are sure of the local security for our onsite personals.
Newest Quotation of the GE 10 and its generator set and all it needed auxilliaries: FOB China 10-12 months, 7,500,333USD per unit. and for duel fuel of gas and light diesel power plant: FOB China: 8,100,000USD. both quotation does not including installtion and civil works.
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