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J. Ocean Eng. Technol. > Volume 26(3); 2012 > Article
J. Ocean Eng. Technol. 2012;26(3):1-5.    
DOI: https://doi.org/10.5574/KSOE.2012.26.3.001   

Development of Complex Energy Saving Device
Lee Kwi-Joo,An Jung-Sun
Department of Naval Architecture and Ocean Engineering Chosun University,Department of Naval Architecture and Ocean Engineering Chosun University
Copyright © 2012 The Korean Society of Ocean Engineers     Open access / Under a Creative Commons License
Key Words: Energy saving device, Stator, Complex energy saving device
Abstract
A complex energy saving device has been developed for middle class vessels. The propulsive performance of the developed device is described through a model test. The pre-swirl stator, which recovers the rotational energy of the propeller slipstream, is a well-known energy saving device for large vessels. The pre-swirl stator for a large vessel is usually cast as a part of the stern frame and has a high cost. The manufacture of a cast stator for an existing vessel is almost impossible. The complex device that was developed can be fitted on astern frame by welding. The model tests show a 4-6% efficiency gain for middle class vessels with the developed appendages compared to those with bare hulls.


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