Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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A study on the Development of Energy-Saving Device "Crown Duct"

  • Lee, Kwi-Joo (Dept. of Naval Architecture & Ocean Engineering, Chosun University) ;
  • An, Jung-Sun (Dept. of Naval Architecture & Ocean Engineering, Chosun University) ;
  • Yang, Sun-Hee (Basic Planning Department, SPP Shipbuilding Co., Ltd.)
  • Received : 2012.06.14
  • Accepted : 2012.10.25
  • Published : 2012.10.31
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Abstract

A energy saving device "Crown duct" has been developed and its efficiency gain has been verified experimentally in the towing tank of SSPA. The preswirl stator is well known as one of energy saving devices, which recovering the rotational energy of propeller slipstream. Crown duct has two functions of recovers the rotational energy by three blades on top of duct and of flow concentration by semi-duct. The model tests showed 4.4% efficiency gain with Crown Duct at full load condition and 6.9% at ballast condition compared with the bare hull ones for the middle class tanker.

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References

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