By allowing boil-off gas from the cargo tank to be re-liquefied, the system provides improved efficiency and reliability.

In a statement on December 7, Samsung Heavy Industries (SHI) said that its re-liquefaction device called "X-Reli" has won Detail Design Approval from the maritime classification society, the American Bureau of Shipping. The method of taking on and developing the accepted concept design is comprehensive design, or developed design.

The X-Reli system, designed for low-pressure dual-fuel engines, enhances performance and reliability, SHI has said. Dual-fuel engines use low-pressure gas supplied and ignited by a low volume of pilot liquid fuel.

Low-pressure X-DF technology is based on the concept of lean-burn Otto-cycle combustion in which a relatively high air-to-fuel ratio of fuel and air is premixed and burned.

Due to excessive combustion of evaporative emissions during docking or low-speed service, the X-Reli system can decrease CO2 emissions and conserve cargo volume.

SHI said it will build additional X-Reli technology for remote control and maintenance functions to converge with SVESSEL's smart ship technology.

Maritime Business World