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Brief Introduction of 10MW Gas Turbine 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 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 2. Main technical parameter of unit (under ISO condition) 2.1 Heat performance of unit
Base load
Peak load Rated generating
power(KW) ≮11500
≮13200 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 50HzEfficiency
≥97% 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
1.3～1.5MPa (d) Natural gas inlet temperature of supplying system
30～70℃ (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 60℃ or so in the cell. When the temperature is more than
60℃ in the cell, two fans work at the same time to ensure the temperature
not more than 100℃ in the enclosure. When the unit stops running
and the temperature of enclosure drops to 5℃,
the temperature switch is shut off and heater begins to work. When the
temperature is more than 15℃,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 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）
≮11500
Heat
Efficiency
27%
Heat
Consumption KJ/KWh
13333
Air
Intake flow of Compressor（kg/s） 60.07
Boosting
Ratio of Compressor
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） 60.47
Temp.
at Exit of Power Turbine（K） 767
Revolving
Direction of Rotor of Power Turbine Clockwise(View from Air Intake)
Pressure
at Exit of Exhaust Scroll（105Pa） 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
3000rpm Rated
Voltage
6.3kV Power
Factor
0.8 Efficiency
≥97% Cooling
Type
Up side water cooled Revolving
Direction
Clockwise from view of Exciting 6.2
Heat Recovery Boiler Pressure
of HP Steam MPa：
5.8 Temp.
of HP Steam ℃:
455 Flow
of HP Steam t/h:
20.6 Pressure
of LP Steam MPa:
0.42 Temp.
of LP Steam℃:
148 Flow
of LP Steam t/h:
3.4 Boiler
Exhaust Temp. ℃:
146 6.3
Steam Turbine Generation Set Steam
Turbine Rated Power kW:
4500 Rated
Steam Flow t/h:
20.6 Rated
Intake Steam Temp.℃:
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
7.2 Combined Cycle of 10MW Gas Turbine Generation Set
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 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. |
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