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Joint project sees methanol an option for more ship types

Malcolm Latarche by Malcolm Latarche
December 8, 2020
in Fuels and lubricants, Opinion
Joint project sees methanol an option for more ship types
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A coalition of some of the leading names in sustainable shipping have collaborated on a Joint Industry Project to enable product tanker charterers and shipowners to utilise methanol as fuel regardless of the cargo carried.

Hyundai Mipo Dockyard, MAN Energy Solutions, and the Methanol Institute worked together to develop a design that meets all prevailing safety requirements with minimal loss of cargo capacity and low additional build costs. DNV GL reviewed the designs for the vessels in accordance with the relevant rules and regulations as well as provide technical advice and recommendations to help enhance the design development.

The resulting design – Low Emission Advanced Products Tanker (LEAP) – has been granted Approval in Principal by classification society DNV GL, which acted as verification body to the project, assessing and approving the design to its rules and the latest amendments to the IMO IGF Code.

The vessel has a service speed of 14.5kt and effective range of 17,400 nautical miles using methanol as primary fuel and an effective range of 21,900 nautical miles using VLSFO and cargo capacity of 54,000 m3 cu m – a reduction of just 300 m3 tonnes compared to a diesel-only vessel.

The LEAP design has additional newbuild costs of just 10% compared to additional capex of 22% for LNG-dual fuel and using methanol as fuel would have daily CO2 emissions of 54.7 tonnes at service speed, compared to 64.7tpd for diesel. The ship would have an approximate 6% improvement in its EEDI Phase 3 rating compared to a diesel-only vessel.

The design uses two slop tanks of 2,600 cu m to store methanol as fuel, positioned aft of the cargo tanks, protected by a cofferdam, with the fuel supply system connecting to the engine room via an on-deck service tank. methanol is bunkered by an independent manifold and the design includes tanks for VLSFO and MDO storage to provide complete operational flexibility.

“HMD is pleased to have provided initial and detailed design for the LEAP vessel design using the experience accumulated from successful dual fuel methanol carriers for numerous international owners,” said YH Chung, head of Initial Design Department, Hyundai Mipo Dockyard. “This design results in estimated cargo loss of 0.5% for a low construction premium, providing shipowners with the ability to build a low emissions vessel today.”
MAN Energy Solutions provided input to the arrangement of the fuel supply and propulsion system, based on application of its proven ME-LGIM two-stroke Methanol-capable main engine. There is no significant additional ‘footprint’ for Methanol fuel system since the service tank, methanol pipelines and methanol fuel supply room are located on deck.

“Methanol ticks the boxes from an emissions point of view, with no sulphur, very low PM and carbon dioxide emissions around 15% lower than conventional marine fuel oil,” said Kjeld Aabo, Head of Marine and Offshore Sales, 2 and 4 stroke engines, MAN Energy Solutions. “To meet IMO NOx Tier III requirements, methanol can be blended with water which brings the ship into compliance without the need for expensive exhaust gas after treatment.”

DNV GL’s Approval Center verified the design in accordance with its rules and applicable international regulation including the latest amendments to the IGF Code which include guidelines on the use of methyl/alcohol fuels.

“DNV GL has assessed this design in accordance with its rules and all international standards and is pleased to provide Approval in Principle for a vessel which can make a significant contribution to lower emissions,” says Vidar Dolonen, Regional Manager of DNV GL Korea and Japan. “In the drive to decarbonise shipping, DNV GL has identified an important role for methanol produced from biomass or renewable energy sources.”

The Methanol Institute believes the next few years will be crucial ones for the take up of fuels that can begin to have an impact on global carbon emissions from shipping. Huge investment will be required to produce renewable fuels and owners may have to demonstrate that they have taken steps to address their environmental performance in order to access fresh capital in future.

“Governments, NGOs, policy-makers, academics and technical experts all agree that conventional Methanol provides a safe, clean and practical pathway to short term emissions reductions,” said Chris Chatterton, Chief Operating Officer, The Methanol Institute. “This vessel design demonstrates that newbuild or conversion can be straightforward and cost effective and extends the trading life of the asset as it can use renewable Methanol as more becomes available.”

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