Steam turbines

Classification of steam turbines for CHP
5
10
15
20
25
Давление свежего пара, МПа
50
100
150
200
250
300
350
Мощность, МВт

Class Б.3: two-casing turbines with the high-pressure and low-pressure casings. In this case, the high-pressure casing is made to be double-casing with an internal casing featuring a reversed flow arrangement and steam removal from the inter-body space for resuperheating (if any) and subsequent steam supply from resuperheating into the casing center into the inter-body space. Steam distribution can be both nozzle and throttle based on the assumed operating conditions. The low-pressure casing is made to be double-flow symmetrical with two radial exhausts to the condenser group. The capacity range is from 150 MW to 350 MW, live steam pressure is from 12.8 to 23.5 MPa (130-240 kgf/cm2). The turbine can also feature a third low-pressure circuit steam supply (for example, for CCPP) into bypass pipes from the high-pressure to the low-pressure casing. The turbine features the possibility to organize single-stage controlled heat extraction with a capacity from 100 to 250 Gcal/h, as well as uncontrolled industrial steam extraction for a balance of plant with a capacity of up to 100 t/h.

Characteristics

Values

Main type of the turbine

Cogeneration / condensing

Basic design feature

Two-casing, HPC with a loop-type steam flow with the inner casing and steam delivery from the inner casing space to reheating, LPC has double-flow casing

Steam distribution type

Throttle / nozzle

Electricity output range, MW

150-350

Main steam characteristics:

- Pressure, MPa

12.8-23.5

- Temperature, °С

540-570

Capability of steam reheating

Yes

Capability of steam bleeding for heating:

- Scheme

Controlled steam bleeding; Single-stage delivery water heating

- Maximum heating load, Gcal/h

100-250

- Steam extraction flow rate, t/h

190-480

Capability of steam bleeding for industrialuse:

- Flow rate, t/h:

up to 100 t/h

- Scheme

Non-controlled / controlled steam bleeding

- Guaranteed pressure, MPa

0.8-2.1

Characteristics of the main condenser

- Cooling water flow rate, m3/h

16,000-28,000

- Heat exchange surface area, m2

6,200-14,000

Turbines of this class

К-200-12,8 (project)


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