Review of operational challenges and changing conditions associated with offshore submerged vertical pumping station

M. L. Samsudin, K. M. Munisamy, Savithry K. Thangaraju

Research output: Contribution to journalConference article


Cooling water system is one of the essential auxiliary systems for a power generating plant. The decision to have an offshore pumping station, instead of onshore station, may have been driven by the scarcity in land area or for direct water supply access. However, the design has several disadvantages such as tendency for sediment intakes, limited condition monitoring activities and inaccessible sump for maintenance and modification. The paper reviews and lists several potential operational challenges and difficulties experienced with the offshore station. The influences of changing conditions such as varying seawater tide level, clogged intake screen, intake sedimentation issues and marine fouling on the sump walls and structures, are discussed and mitigating solutions are identified. While it is impractical to conduct physical model test for studying flow pattern, the CFD method can be an attractive assessment tools. In addition to this, a review of plant operating parameters can assist in identifying flow anomalies to anticipate potential deterioration. Finally the difficulty in incorporating the solutions to vortex and sediment problems within the sump is highlighted with preference for those which can be managed by limited access or those which are moveable with the vertical pump.

Original languageEnglish
Article number012023
JournalIOP Conference Series: Materials Science and Engineering
Issue number1
Publication statusPublished - 21 Sep 2015
Event7th International Conference on Cooling and Heating Technologies, ICCHT 2014 - Subang Jaya, Selangor Darul Ehsan, Malaysia
Duration: 04 Nov 201406 Nov 2014

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)

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