Performance analysis of a new LP stage located upstream the extraction point in a 225 MW turbine

Authors

  • М. Шиманяк R. Shevalskogo Institute of flow machines PAN, Poland
  • А. Гардзилевич R. Shevalskogo Institute of flow machines PAN, Poland
  • Н. В. Пащенко A. N. Podgorny Institute of Mechanical Engineering Problems of NAS Ukraine, Ukraine
  • И. Ю. Нагорный A. N. Podgorny Institute of Mechanical Engineering Problems of NAS Ukraine, Ukraine

Keywords:

steam turbine, low pressure cylinder, rotor, extraction chamber

Abstract

A new design of steam turbine stages upstream an extraction point is presented. In this solution a special ring guides the steam leakage flow directly to the heat exchanger. . The solution is based on the use of special ring, which directs a jet of steam flow, formed by the intersection at the rotor radial gap, directly through the heat exchanger adjustable selection. The experiments and calculations have confirmed advantages of the new design as manifested by turbine operating features and efficiency. The design has been applied in 30 old turbines with Baumann stages. Recently, the patent was used in the LP exit ND-41A of modernized 225 MW turbines in the Polaniec and Kozienice power plants. It is planned to use this approach for all designs of steam turbines, in which the blades of the rotor before extraction of steam are made without bandage seals. The aforementioned solution can also be used in the design of thermal turbines, in which flows in the extraction are much higher and changes in consequently operation of the machine, but it is necessary to conduct appropriate studies and numerical analysis.

Author Biographies

М. Шиманяк, R. Shevalskogo Institute of flow machines PAN

PhD

А. Гардзилевич, R. Shevalskogo Institute of flow machines PAN

Doctor of Technical Sciences

Н. В. Пащенко, A. N. Podgorny Institute of Mechanical Engineering Problems of NAS Ukraine

PhD

References

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Published

2016-03-30

Issue

Vol. 19 No. 1 (2016)

Section

Power Engineering

License

Copyright (c) 2016 М. Шиманяк, А. Гардзилевич, Н. В. Пащенко, И. Ю. Нагорный

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