JAPANESE MARINE ECO PRODUCTS
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28Propellers, xedEnergy saving, GHG, EEDI, Propulsion efciency, Hub vortexINQUIRIES INQUIRIES Business Operation Division, International Department690 Kamiyabe-cho, Totsuka-ku, Yokohama, 245-8542, JapanTel : +81-45-811-2461 Fax : +81-45-811-9444E-mail : info@kamome-propeller.co.jpBusiness Operation Division, International Department690 Kamiyabe-cho, Totsuka-ku, Yokohama, 245-8542, JapanTel : +81-45-811-2461 Fax : +81-45-811-9444E-mail : info@kamome-propeller.co.jphttp://www.kamome-propeller.co.jp/en http://www.kamome-propeller.co.jp/en KAMOME PROPELLER CO., LTD.KAMOME PROPELLER CO., LTD.Propellers, controllableEnergy Saving, GHG, EEDI, EEOICP PropellerAs the torque-rich of main engine caused by the fouling of the hull or the effect of waves and wind can be avoidable by adjusting CPP pitch angle and speed properly through ALC or combination control, when building the vessel, the main engine output can be minimized compared with FPP without considering margin to reduce fuel consumption.The advantage of CPP for large energy saving is exercised by the shaft generator system driven by main engine with constant speed or the hybrid propulsion system where diesel main engine and electric motor/generator are combined as a propulsion prime mover.The SG propeller applies the reducing technology of the hub vortex strength and the optimization technology of the blade loading distribution and the numerical calculations including the cavitation simulation, the propeller exciting force estimation, etc. are introduced in its design. The reduced hub vortex strength improves the lower pressure region behind the hub which causes the thrust deterioration. The optimized blade loading distribution increases the propeller open water efficiency without deteriorating the cavitation performance.Accordingly the SG propeller improves the efficiency about 3% than the conventional propeller and has been installed in over 150 vessels for the last 5 years.SG Propeller

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