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 А.2: single-casing turbines with straight steam flow arrangements for pressure from 4.9 to 8.8 MPa (50-90 kgf/cm2), last stage blade with the length from 430 to 660 mm (17-26 in) can be used, capacity range is from 40 to 80 MW. Throttle control featuring the remote valve unit or several units, moreover, multiple steam nozzle control with control valve installed on the casing can be implemented. The turbine is supposed to come with the radial exhaust to one water-cooled condenser, the version with the axial exhaust to the air cooling condensing unit also exists. The casing is a combined one – the steam inlet part is cast, the middle part is welded and forged, the exhaust part is welded. In the front part, the casing rests on the remote front bearing unit, in the rear part the casing rests on the rear transverse frame and side frames in the area of the exhaust part. The turbine features the possibility to organize single-stage controlled heat extraction with a capacity from 50 to 140 Gcal/h, industrial steam bleeding with a capacity from 50 to 150 t/h.

Characteristics

Values

Main type of the turbine

Cogeneration / condensing

Basic design feature

Single-casing with a straight steam flow

Steam distribution type

Throttle / nozzle

Electricity output range, MW

40-80

Main steam characteristics:

- Pressure, MPa

4.9-8.8

- Temperature, °С

400-555

Capability of steam bleeding for heating:

- Scheme

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

- Maximum heating load, Gcal/h

50-140

- Steam extraction flow rate, t/h

100-280

Capability of steam extraction for industrialuse:

- Flow rate, t/h:

50-150 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

5,000-8,000

- Heat exchange surface area, m2

1,700-3,100

Turbines of this class

ПТ-30/40-8,8/1,3, Т-50/60-8,8, Т-60/65-8,8, К-63-8,8


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Izotin Dmitri
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