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 В.1: three-casing turbines with the high-pressure, intermediate-pressure, and low-pressure casings. The high-pressure casing features blade carriers design. The separate control stage is not executed. Steam distribution can be both nozzle and throttle based on the assumed operating conditions. The intermediate-pressure casing is made with straight flow blade carrier design. Steam flows in the high-pressure and low-pressure casings are opposite to compensate axial forces on the pad of thrust and radial bearing. Steam supply from the hot resuperheating can be arranged atthe intermediate-pressure casing. The low-pressure casing is made to be double-flow symmetrical with two radial exhausts to the condenser group. The capacity range is from 100 to 240 MW, live steam pressure is from 8.8 to 15.7 MPa (90-160 kgf/cm2), last stage blades with a length from 550 to 660 mm (22-26 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 extraction with a capacity of up to 150 t/h.

Characteristics

Values

Main type of the turbine

Cogeneration / condensing

Basic design feature

Three-casing, HPC and LPC

with an opposite steam flow incasings,

LPC hasdouble-flow casing

Steam distribution type

Throttle/nozzle

Electricity output range, MW

100-240

Main steam characteristics:

- Pressure, MPa

8.8-15.7

- Temperature, °С

500-570

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 extraction for industrialuse:

- Flow rate, t/h:

up to 150 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

Т-120/130-12,8-8МО, Тп-115/130-12,8


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