A World First in LPG Propulsion

Ensuring Environmental Sustainability

On 28 February 2020, BW LPG announced that it has exercised another option for the delivery and retrofitting of a further four dual-fuel LPG propulsion engines. With this, BW LPG has committed to retrofit 12 of its Very Large Gas Carriers (VLGCs) with pioneering LPG propulsion technology.

This announcement follows an announcement on 30 August 2018, where BW LPG announced a world’s first initiative to deliver and retrofit four LPG dual-fuel engines in its fleet, and 10 February 2020, where it subsequently exercised an option for an additional four dual-fuel engines on the back of stronger-than-expected performance during rigorous type-approval tests.

Says Anders Onarheim, BW LPG CEO, “The Board and Management at BW LPG continue to emphasize a deep corporate commitment to sustainable development. For us, as the world’s largest owner and operator of VLGCs, this means that we invest significant resources and expertise to pioneer technology that can be used to push our industry towards decarbonization without the need for dedicated newbuilding orders. We thank our industry partners who have worked in close collaboration with us to ensure that this pioneering technology is safe and reliable for implementation”.

Delivery and retrofitting of these 12 dual-fuel engines into BW LPG’s fleet will begin as planned in 2020 and will be completed in 2H 2021.


Building Business Sustainability

Increase in Efficiencies
With LPG as a marine fuel, output efficiencies will rise by around 10% against fuel oil, which will in turn generate notable gains in total voyage fuel economics. This, along with other advantages, secures LPG’s position as a long-term sustainable marine fuel.
Lower Price Sensitivity, Higher Cost Efficiency 
Cost-wise, LPG is also a better option than compliant fuel oil, with high lifetime savings prospects. By leveraging LPG as a marine fuel, BW LPG benefits from savings due to lower fuel consumption and full dual-fuel flexibility, which guards against price sensitivity to post-2020 fuel price fluctuations, thereby futureproofing the Company.
More Reliable, Fully Flexible and Cleaner Alternative with Dual-Fuel Engines
Harnessing LPG propulsion translates into cleaner, more efficient engines that are cheaper to maintain. In addition, the fuel flexibility of dual-fuel engines ensures full redundancy (duplication of critical components of a system with the intention of increasing reliability to improve actual system performance) for uninterrupted operations.



Time to act on IMO 2020 - three available options

 Dual Fuel/LPG
•Approved technology
•Worldwide availability
•Clean and efficient
•Addresses IMO sulphur regulations
•Competitive price for LPG as fuel
Compliant Fuel/MGO
•No capex investment
•Level playing field for all
•Majority of the VLGC fleet by 2020
•Price and specification uncertainty

•Short term solution & compliance concern
•Limited allowance for use within port limits
•High maintenance cost
•Waste & chemical management
•Increased consumption
•HFO price & availability
 BW LPG-LPG Propulsion-dual-fuel

 Compliant Fuel-MGO Scrubbers-HFO

Cost Efficient Today and Tomorrow

cost efficient-LPG Propulsion

Operational and performance impact

LPG fuel performance
  • ME-LGIP engine will consume LPG as main fuel and HFO or compliant fuel as pilot oil
  • Possible to run on any LPG/fuel mix, while complying with the emission regulations
  • LPG as fuel addresses IMO sulphur regulation forever
  • PG is more efficient ~11% improvement in consumption
  • Bunkering directly at load terminal or,
  • Ship-to-ship from smaller LPG carriers ~ 500 vessels in service
  • Elimination of bunker quality issues and spill risks
  • Cleaner and easier to maintain and handle
  • More Reliable, Fully FLexible and Cleaner Alternative with Dual-Furl Engines
  • Harnessing LPG propulsion translates into cleaner, more efficient engines that are cheaper to maintain. In addition, the fuel flexibility of dual-fuel engines ensures full redundancy for uninterrupted operations.
LPG fuel transfer and deck tank flexibility 
  • Deck tanks are connected to the cargo system
  • Possibility to send condensate to deck tanks
  • Deck tanks can be used as cargo tanks
  • Possibility of additional cargo
  • Can be used for grade change

Technical solution designed to minimize cost and exposure

86,000 m3

cargo tanks + deck tanks

1,800 m3 deck tanks

flexibility on fuel choice
additional cargo

99% filling ratio

combination of deck tanks 
49,370 mt carrying capacity

DNV-GL Approved

IGC code compliant
HAZID completed

C3/C4 /LPG Mix

MDO/Compliant fuel

fuel flexibility

Bunkering flexibility

In port or ship-to-ship
no deviation -
increase utilisation

ECO speed/cons

16 knots / ~36.5 MT/day

100% VLGC

ports compatible

draft will not be an issue