BW LNG Stretches the 174,000 CBM Workhorse to a 177,000 CBM Design
Three-tank configuration adds 3,000 cbm of cargo without changing vessel dimensions
BW LNG has set out more detail on a design that pushes LNG carrier capacity beyond the conventional 174,000 cubic metre size, using a 177,000 cbm three-tank configuration intended to carry more cargo while retaining the flexibility and terminal compatibility of the established class.
The design will be used on four LNG carriers being built by HD Hyundai Samho, with deliveries scheduled between the fourth quarter of 2028 and the third quarter of 2029. It was developed with GTT and HD Hyundai Heavy Industries and has been evaluated and approved by DNV.
The configuration increases cargo capacity by 3,000 cubic metres without changing the vessels' overall dimensions. That is the commercial point of the exercise: terminal compatibility across a wide range of berths is a function of length, beam and draught, and a design that adds cargo without touching those parameters preserves trading flexibility.
The three-tank layout also provides operational flexibility for partial-load conditions, and incorporates a lower boil-off rate that can reduce natural boil-off and reliquefaction power requirements.
"The 174k cbm LNG carrier has become a preferred size in today's LNG shipping market, offering the compatibility and operational flexibility needed to serve a wide range of terminals and trading routes," the company said. "With our new 177k cbm three-tank design, BW LNG is building on these strengths by increasing cargo capacity by 3,000 cbm - while retaining the same vessel dimensions and compatibility."
The vessels will use GTT's Mark III membrane containment technology with reinforced membrane systems. BW LNG expects the larger cargo capacity and lower energy requirements to reduce emissions intensity per unit of LNG delivered.
The company described the design as an evolution of the established vessel rather than a departure from it. "Rather than changing what already works, the 177k design takes the flexibility and compatibility of the 174k workhorse and enhances it with greater carrying capacity and efficiency," it said.
BW LNG is part of Singapore-based BW Group.
