Steam Turbines for Thermal Power Plants (Up to 250 MW)
Characteristics
Exhaust steam exits the turbine from only one direction (single-flow). By utilizing a longer last stage blade (LSB), a single flow turbine with axial exhaust is possible in comparison to a double-flow turbine with downward exhaust. An axial exhaust reduces hood losses, thus allowing higher efficiency to be achieved as compared to a downward exhaust.
In addition, as a single welded (or mono-block) rotor is used, the high pressure (HP), intermediate pressure (IP) and low pressure (LP) sections can be contained within a single casing. This compact frame turbine (SRT) can reduce construction costs for the turbine building and foundation. A smaller number of components also reduce the time required for inspections and number of spare parts, thus allowing easier maintenance.
Steam Turbine Specifications
No. of casings | Single casing (HP/IP/LP Turbine) Double casing (HP/IP Turbine - LP Turbine) Double casing (HP Turbine - IP/LP Turbine) |
---|---|
Output | Up to 250 MW |
Main steam conditions | Up to 16.5 MPa / Up to 600°C |
Reheat steam conditions | Up to 600°C |
Revolutions per minute | 3,000 min-1 (50 Hz) / 3,600 min-1 (60 Hz) |
- Downward exhaust can also be designed if the customer has such requirements.
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