Wärtsilä, a provider of marine industry LNG solutions and services, will supply its Energy Storage System (ESS) to Louisiana-based Harvey Gulf, which will retrofit the system to four Harvey Energy-class LNG-fueled Platform Supply Vessels (PSVs). A fifth vessel in this class was previously fitted with a Wärtsilä ESS.

When the upgrade project is completed, all five vessels will be capable of tri-fuel operation,  providing Harvey Gulf with a flexible, fuel-efficient class of PSVs in the Gulf of Mexico. The boats will be capable of closed bus Dynamic Positioning (DP) operation running only one engine, augmented by the Wärtsilä ESS. When stationary in the field or in port, the boats will be able to operate on battery power only, reducing fuel consumption and exhaust emissions.

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“The conversion to tri-fuel technology is a tremendous addition to our already successful Harvey Energy-class PSVs. Wärtsilä’s advanced technology and its unwavering commitment to service and support were extremely important factors in our decision to select them for this project,” said Harvey Gulf CEO Shane Guidry.

The four vessels, the Harvey Power, Harvey Liberty, Harvey Freedom and Harvey America, will each be fitted with a Wärtsilä ESS comprising a Closed Bus-Tie 1,360 kW drive with 746 kWh 1,100 V batteries. The retrofitting project will begin in 2021 and will be completed in early 2022.

Source: Wärtsilä