The technology group Wartsil? has introduced its Compact Reliq reliquefaction plant. The system is designed to reliquefy boil-off gas (BOG) onboard gas carriers and LNG bunker vessels, and for keeping the cargo cool under all operational conditions. Its compact design enables it to be installed on existing vessels without extensive modification work.

“Wartsil? has been a pioneer in BOG reliquefaction and the Compact Reliq is a continuation of our strong development activities in this field. As the global market for LNG applications expands in response to increasing environmental regulations, greater flexibility in meeting these growing needs is required. The Compact Reliq is an important and innovative new piece towards completing the puzzle,” says Kjell Ove Ulstein, Director Sales & Marketing, Gas Solutions, Wartsil? Marine Systems.

As with previously delivered Wartsil? reliquefaction systems, the Compact Reliq is based on well-proven Brayton technology. This allows a portion of the BOG to be utilised as fuel for the vessel, while the excess can be liquefied and sold with the LNG cargo. Liquefying the BOG instead of burning it in a Gas Combustion Unit also has a positive environmental effect, as no gases are released into the atmosphere.

The system is prepared in line with Wartsil?’s Smart Marine approach to take advantage of the latest digital technologies to optimise efficiency. The Compact Reliq is compatible with Wartsil?’s Operational Performance Improvement and Monitoring (OPERIM) protocol, and can be fully integrated with the ship’s Planned Maintenance System (PMS).