Abstract
The choked back pressure characteristic of the steam turbine unit with air cooled condenser is very different with the unit with wet cooling technology, and the understanding of the choked back pressure performance change with operation load is important to guide the economic operation of the unit. One simplified Variable Operation Condition Analysis Method was put forward for calculation of the unit output-turbine back pressure characteristics. Based on this method, the choked back pressure for each operation load can be determined. An example was given for a super-critical, regenerative single-shaft, 2-casing with 2-exhaust steam turbine generation unit with air cooled condenser. The calculation result was provided and compared with the result of the unit with wet cooling technology.
Highlights
In the past years, many of the large capacity steam turbine generation units with air-cooled condensers (ACCs) have been put into operation
The choked back pressure characteristic of the steam turbine unit with air cooled condenser is very different with the unit with wet cooling technology, and the understanding of the choked back pressure performance change with operation load is important to guide the economic operation of the unit
An example was given for a super-critical, regenerative single-shaft, 2-casing with 2-exhaust steam turbine generation unit with air cooled condenser
Summary
Many of the large capacity steam turbine generation units with air-cooled condensers (ACCs) have been put into operation. For steam turbines with ACCs, special designed LP last blading is used, and the resulted characteristic of generator output versus turbine back pressure is completely different with the turbines using wet cooling technology. To keep the unit generator output stable and constant, the turbine inlet steam flow decreases with the lowering down of the turbine back pressure. For the units with ACCs, it is possible that the actual operation turbine back pressure is controlled below the choked back pressure limit, the unit performance will deteriorate. This could be avoided by lowering down of speed the ACC fans
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
