Daewoo shipyard's rotor sail technology wins certification from classification society

By Lim Chang-won Posted : March 22, 2021, 11:09 Updated : March 22, 2021, 11:09

[Courtesy of Daewoo Shipbuilding & Marine Engineering]

SEOUL -- A rotor sail system developed by Daewoo Shipbuilding & Marine Engineering, a major shipbuilder in South Korea, has won certification from DNV, an international accredited registrar and classification society based in Norway. As the first domestic company to produce a rotor sail system, the shipbuilder vowed to gain an upper hand in global shipbuilding orders.

When wind meets the spinning rotor sail, the airflow 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.

Daewoo Shipbuilding & Marine Engineering (DSME) said on March 22 that its rotor sail has won "Approval in Principle" from DNV. "We will focus on developing eco-friendly ship technology that can be applied to ships immediately to respond to intensifying global environmental regulations," said DSME's research center head Choi Dong-kyu.

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.
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