Class А.3: single-casing turbines with reverse steam flow arrangement with internal casing and inter-body space. Inter-body space can be used both for steam supply (for example, for use in combine cycle plant units) and for steam extraction (for example, for regeneration or industrial steam extraction). The capacity range is from 50 to 110 MW, live steam pressure is from 5.9 to 12.8 MPa (60-130 kgf/cm2), last stage blade with the length from 430 to 660 mm (17-26 in) can be used. Throttle control featuring the remote valve unit or a nozzle with arrangement of control valve on the casing based on the assumed operating conditions. The turbine is supposed to come with both the radial exhaust to one water-cooled condenser and the axial exhaust to the air cooling condensing unit. The turbine features the possibility to organize single-stage or double-stage controlled heat extraction with a capacity from 50 to 190 Gcal/h, as well as control and uncontrolled industrial steam bleeding with a capacity from 50 to 250 t/h.
|
Characteristics |
Values |
|
Main type of the turbine |
Cogeneration / condensing |
|
Basic design feature |
Single-casing with a loop-type steam flow, with the inner casing |
|
Steam distribution type |
Throttle / nozzle |
|
Exhaust casing type |
Radial / axial |
|
Electricity output range, MW |
50-110 |
|
Main steam characteristics: |
|
|
- Pressure, MPa |
5.9-12.8 |
|
- Temperature, °С |
400-560 |
|
Capability of steam bleeding for heating: |
|
|
- Scheme |
Controlled steam bleeding; Single-stage / two-stage delivery water heating |
|
- Maximum heating load, Gcal/h |
50-190 |
|
- Steam extraction flow rate, t/h |
100-370 |
|
Capability of steam extraction for industrialuse: |
|
|
- Flow rate, t/h: |
50-250 t/h |
|
- Scheme |
Non-controlled / controlled steam bleeding |
|
- Guaranteed pressure, MPa |
0.8-2.0 |
|
Characteristics of the main condenser |
|
|
- Cooling water flow rate, m3/h |
8,000-13,500 |
|
- Heat exchange surface area, m2 |
3,100-6,000 |
|
Turbines of this class |
Т-63/76-8,8, КТ-63-7,7, К-60-12,8, К-65-12,8, К-85-8,0 |
