Dealfeng to equip Singapore-based Hung Ze’s chemical tankers with rotor sails

Dealfeng, a Chinese provider of wind-assisted propulsion systems, on Tuesday (20 May) said it has assigned a cooperation agreement with Singapore-based shipowner Hung Ze Shipping.

The partnership will equip a new series of 14,000 DWT chemical tankers with Dealfeng® Rotor Sails. 

Each vessel will feature a 5m x 24m Dealfeng Rotor Sail installed on its forecastle deck. Collaborating with maritime software leader NAPA, the project will utilise route optimisation systems to maximise the efficiency of wind-assisted voyages, further enhancing fuel savings and emissions reduction while improving overall energy performance.

“The first vessel in the series is scheduled for delivery with the rotor sail system in the fourth quarter of 2025. Preliminary calculations indicate that the technology will achieve approximately 8% fuel savings on the vessel’s trading routes,” the company said in a social media post. 

The project marked Dealfeng’s first overseas commercial contract for its wind-assisted propulsion technology.

Dealfeng, a clean energy technology company specialising in the R&D, manufacturing, and EPC services of shipborne energy-saving systems, has long focused on developing Wind Assisted Propulsion Systems (WAPS). Its core product, the Rotor Sail, harnesses wind energy via the Magnus effect to provide auxiliary propulsion for vessels. 

Tailored to different ship types, the system offers fuel and carbon emission reductions of 5%–25%, with even greater efficiency under favorable wind conditions. Dealfeng’s Rotor Sail technology has obtained certifications from multiple classification societies and has been successfully deployed across numerous vessels, accumulating years of operational experience that validate its safety, reliability, and effectiveness.

Hung Ze operates a diverse fleet ranging from 5,000 DWT vessels to MR product tankers. 

Photo credit: Dealfeng
Published: 22 May, 2025