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.2: two-casing turbines with the high-pressure and low-pressure casings. The low-pressure casing features blade carrier design, in case the availability of extractions from the casing is required or cartridgeless in case there is no such need. The separate control stage is not executed. 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 90 to 200 MW, live steam pressure is from 8.8 to 15.7 MPa (90-160 kgf/cm2), last stage blades with the length from 550 to 940 mm (22-37 in) can be used. The turbine features the possibility to organize single-stage or double-stage controlled heat extraction with a capacity from 100 to 190 Gcal/h, as well as control and uncontrolled industrial steam bleeding with a capacity from 50 to 200 t/h.

Characteristics

Values

Main type of the turbine

Cogeneration / condensing

Basic design feature

Two-casing, HPC with vane carriers and a straight steam flow, LPC has double-flow casing

Steam distribution type

Throttle / nozzle

Electricity output range, MW

90-200

Main steam characteristics:

- Pressure, MPa

8.8-15.7

- Temperature, °С

500-560

Capability of steam reheating

Yes

Capability of steam bleeding for heating:

- Scheme

Controlled steam bleeding; Single-stage/two-stage delivery water heating

- Maximum heating load, Gcal/h

100-190

- Steam bleeding flow rate, t/h

190-370

Capability of steam bleeding for industrial use:

- Flow rate, t/h:

50-200 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

КТ-120-8,8 (project)


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