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The information herewith describes the packaged equipment for a coal-fired steam power plant with the output capacity of 15 MW. Essentially, the package consists of three main components of power generating equipment; namely the boiler, steam turbine and generator; plus some auxiliary devices associated wit these main operating components. The package is based upon coal-fired Circulating Fuel Bed (CFB) technology for the boiler, in which the boiler-based thermal power generation is as the preferred fuel/cycle combination for power generation. The following is the optimized system configuration, which provides low total annual operating costs while maintaining reliability commensurate with the technical features and advantages of all components within the power plant equipment package.
The boiler component consists of a coal-fired drum-type CFB boiler. The boiler component features a super heater, an economizer and an airheaded.
Boiler Component
| Boiler Component |
BL-WX-15 |
Unit |
| Steam Flow |
75 |
ton/hr |
| Steam Pressure |
5.3 |
MPa |
| Steam Temperature |
450 |
°C |
| Feedwater Inlet |
Temperature |
150°C |
The steam turbine component is based upon straight condensing structure. The principle design features of the unit are all structurally impulse, non-reheating, single cylinder type for power plants. The turbines use the advance 3-D technology for through flow path. The units are quite compact in structural size, but with high performance. These steam turbines are fully CNC controlled by adapting hydraulic system. The products are equipped with protective monitoring system, which would ensure the safety and reliability of the steam turbines.
Steam Turbine Component
| Model No. |
SC-RT-15 |
Unit |
Output
|
15
|
MW |
Speed
|
3000
|
rpm |
Steam Pressure
|
3.43 k
|
Pa.a |
Steam Temperature
|
435
|
°C |
Steam Flow
|
106
|
ton/hr |
Exhaust Pressure
|
6.46
|
kPa.a |
| Steam Rate |
Design Condition
|
7.06
|
kg/kW.h |
Condensing Condition
|
4.49
|
kg/kW.h |
| Heat Rate |
Design Condition
|
9705
|
kg/kW.h |
Condensing Condition
|
11911
|
kg/kW.h |
Feed Water Temperature
|
153
|
°C |
Weight of Turbine
|
58
|
ton |
Weight of Upper Half
|
15
|
ton |
Weight of Turbine Rotor
|
7.56
|
ton |
External Dimension
|
6 x 3.6 x 3.6
|
m |
External Dimension
|
750
|
mm |
The Turbo-Generator component consists of one generator, one exciter and one cooler as the operating unit. The 3-phase synchronous turbo-generator component matches with their respective steam turbine component in power generating capacity. For example, the model number BW-CG-15 package (15 MW) would be used in conjunction with the model number SC-RT- 15 steam turbine (15 MW) for a 15 MW power plant. The cooling method for the equipment within the package is the closed-loop air-cooling type. The rotor is cooled by internal air flow. The air cooler is located under the generator. The excitation method is the AC brushless exciter with permanent pilot exciter type. The generator is equipped with high precision digital automatic voltage regulator (AVR).
Turbo-Generator Component (Generator)
| Model No. |
BL-WX-15 |
Unit |
| Power |
15 |
MW |
| Voltage |
10.5 |
kV |
| Current |
1031 |
A |
| Rotation |
3000 |
rpm |
| Power Factor |
0.8 |
|
| Frequency |
50 |
Hz |
| Efficiency |
97.6 |
% |
Turbo-Generator Component (Exciter)
| Model No. |
BW-EX-15 |
Unit |
| Power |
80 |
kW |
| Voltage |
250 |
V |
| Weight |
1220 |
kg |
Turbo-Generator Component (Cooler)
| Model No. |
BW-CO-15 |
Unit |
| Cooling |
360 |
kW |
| Cooling Flow |
10 |
m³/s |
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