Ulstein introduces energy-efficient subsea vessel design

March 18, 2024
Ulstein has designed a new subsea vessel for offshore wind and oil and gas floating and fixed installations.

Offshore staff

ULSTEINVIK, NorwayUlstein has designed a new subsea vessel for offshore wind and oil and gas floating and fixed installations.

The Ulstein SX232 features an optimized hull design based on the Ulstein Twin X-Stern for walk-to-work operations; a smart power and propulsion system said to minimize energy consumption while the vessel is in DP mode; and an energy recovery system that uses all waste heat generated in the machinery systems (cooling water and exhaust). 

The design also includes options for switching fuels and a battery energy storage system for peak shaving and spinning reserve purposes.

At the forward section of the vessel is accommodation for 130 people and two ROV hangars. At the rear of the accommodation block is a moonpool, with a flat deck of more than 2,000 sq m, enabling different operational setups according to the maritime task.

Although the base design incorporates a 250-metric-ton offshore crane, the platform can also support a larger 400-mt model. Using this upgraded crane capacity, the vessel could support installation of suction anchors.

Another option is to use the vessel for inter-array cable lay operations.

The company is building 10 vessels of the new design and expects the first to begin operations later this year.

03.18.2024