Energy saving device for ship : IHIMU semicircular duct
2007
To meet the increasing energy saving demand due to the rapid rise in fuel oil costs, a semicircular duct type energy saving device was developed. Compared with the present energy saving devices of the circular duct type, the lower part of the duct was removed to maximize its performance when located in the complex flow field around the stern, considering the hydrodynamic factors which govern the energy saving effect. A number of model tests were carried out and the results indicated that the energy saving for IHIMU semicircular duct was around 5%. This paper describes the principle and procedure for the development of the new type semicircular duct.
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