News

The adoption of wind-assisted propulsion systems (WAPS) is set to accelerate in the coming years, driven by increasing industry interest and the expansion of production and installation capacities, according to classification society DNV.

In response to this growing trend, DNV has released a new whitepaper offering an in-depth analysis of WAPS technologies, their integration into vessels, and the potential for fuel savings. The report aims to help shipowners assess the feasibility of these systems for their fleets and operations.

The whitepaper explores various design and operational factors influencing WAPS fuel efficiency and outlines the steps required to evaluate new systems from concept to implementation. It also includes case studies modeling WAPS installations in European waters, demonstrating how these solutions can reduce fuel costs and emissions while ensuring compliance with EU ETS and FuelEU Maritime regulations.

“As we navigate the maritime energy transition, it’s crucial to consider all options for decarbonization. With increasing verified data, the business case for WAPS technologies is strengthening. They are already delivering significant fuel savings when matched to the right vessel type and operational profile,” said Knut Ørbeck-Nilssen, CEO of Maritime at DNV. “As part of a suite of new energy efficiency technologies, WAPS are playing an expanding role in maritime decarbonization.”

While retrofitting WAPS is possible for most vessels with sufficient deck space and unobstructed airflow, ships designed with integrated WAPS solutions offer even greater optimization potential. Currently, 75% of WAPS-equipped vessels are retrofits, with tankers and general cargo ships leading adoption. Rotor sails dominate the bulk and tanker sectors, accounting for 54% of installed systems, while suction sails are preferred for general cargo vessels, making up 67% of installations.

“Current WAPS technologies incorporate advanced automation and aerodynamics, leveraging computer modeling and modern materials. While still in the early stages of widespread adoption, these technologies hold great promise as a component of hybrid propulsion systems. Looking ahead, we may soon witness the first fully wind-powered modern cargo vessel, Orcelle, entering service,” said Hasso Hoffmeister, Senior Principal Engineer at DNV.

The rising popularity of wind-assisted propulsion in shipping is attributed to its status as a ‘free energy source.’ Given the vast and consistent availability of wind in key shipping lanes, the potential for significant fuel savings makes WAPS an attractive option for green shipping.

Market Outlook

The rapid uptake of WAPS is also being driven by economic incentives tied to regulatory compliance. Existing and upcoming rules, such as the Energy Efficiency Design Index (EEDI), the Efficiency Existing Ship Index (EEXI), and International Maritime Organization (IMO) CO2 emission requirements, are prompting shipowners to explore alternative energy solutions.

WAPS can help vessels meet these stringent standards by improving Carbon Intensity Indicator (CII) ratings and reducing fuel consumption, making them a key technology in the shift towards sustainable and efficient maritime operations.

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