Norway classification society partners with Daewoo shipyard to develop rotor sail system

Lim Chang-won Reporter() | Posted : September 6, 2022, 15:59 | Updated : September 6, 2022, 15:59

[Courtesy of Daewoo Shipbuilding & Marine Engineering]

SEOUL -- DNV, an accredited registrar and classification society based in Norway, partnered with Daewoo Shipbuilding & Marine Engineering, a major shipbuilder in South Korea, to develop technologies on fuel saving devices and a rotor sail system, which is seen as an eco-friendly technology for reducing fuel and carbon dioxide emissions.

When wind meets the spinning rotor sail, the air flow accelerates on one side and decelerates on the opposite side. The change in the speed of airflow results in a pressure difference, which creates a lift force. When wind conditions are favorable, rotor sails allow engines to be throttled back, saving fuel and reducing emissions while providing the power needed to maintain speed and voyage time.

Under a memorandum of understanding signed at Gastech, a gas, LNG, hydrogen, and energy event in Italy, Daewoo Shipbuilding & Marine Engineering (DSME) and DNV agreed to jointly develop technologies on a rotor sail system while promoting related businesses. In March 2021, a rotor sail system developed by DSME won certification from DNV.   

"We are making efforts to meet various demands of shipowners related to environmental regulations," DSME's research center head Choi Dong-kyu said in a statement on September 1. "We will do our best to maintain technology competitiveness and prepare for market demands one step ahead." 
DSME said it would produce a prototype of its life-size rotor sail system n the second half of 2022 and establish a demonstration center by 2026.

The International Maritime Organization (IMO), a U.N. maritime safety agency, has adopted mandatory energy-efficiency measures to reduce greenhouse gas emissions from ships. South Korean shipbuilders work hard to develop smart ship technologies as tightened regulations will increase the preference for digital solutions that support efficient navigation.

Korean Register (KR), which offers verification and certification services for ships and marine structures, has partnered with Pan Ocean, a domestic shipping company, and POS SM, a ship management company, to carry out a joint study on a rotor sail system. The study focused on verifying the efficiency of auxiliary devices and developing technologies to cope with carbon regulations. 

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