Proposals for LNGC Propulsion System with Re-Liquefaction Plant, A Review from the World’s First Application (eBook)

Published Date

January 2002

Proposals for LNGC Propulsion System with Re-Liquefaction Plant, A Review from the World’s First Application (eBook)

(Excludes any applicable taxes)

This paper describes the "Onboard BOG re-liquefaction plant" and its successful operations. (55pp)

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Discussions on alternative propulsion systems for LNG carriers have taken place over many years while, during this time, only steam turbine propulsion systems using gas/oil burning boilers have been employed. "LNG JAMAL", an LNG carrier, is a conventional vessel except for her boil off gas (BOG) re-liquefaction plant. Since her delivery at the end of 2000, she has been used in LNG transportation service from Oman to Osaka, saving boil off loss of cargo.

The world's first onboard BOG re-liquefaction plant was developed by mainly using fuel oil for propulsion and preserving cargo LNG. She is equipped with one BOG re-liquefaction plant using nitrogen coolant in the BRAYTON cycle, with enough capacity to process normal BOG at laden voyage. The re-liquefaction capacity is adjusted from about 33% to 100% continuously, and its control is linked to the cargo tank pressure control. Full automation is realized for saving ship's work, not only for normal liquefaction operation during both laden and ballast voyages, but also for system cool down operation at start-up. No special staff is required for the operation of the BOG re-liquefaction plant. This paper introduces the "Onboard BOG re-liquefaction plant" with its successful voyage, and suggests a new alternative propulsion system for an LNG carrier, especially focusing on a multi-diesel engine propulsion system with a BOG re-liquefaction plant.

Paper delivered by:
Hiroyuki Ohira
Masaru Oka
Kazuhiko Ohtake
Kazuaki Yuasa
(all of Mitsubishi Heavy Industries Ltd)

Prepared for:
Gastech Doha 2002

For over 45 years, the Gastech Exhibition & Conference has been at the forefront of the international gas and LNG market. This world-renowned event is regarded as the most significant meeting place for gas and LNG professionals, where the global industry gathers to do business.

Gastech hosts major IOCs, NOC’s, global utility companies, EPC contractors, shipbuilders, pipeline companies, manufacturers, distributors, technology and service providers, all who play an active role in the global energy value chain.

Title: Proposals for LNGC Propulsion System with Re-Liquefaction Plant, A Review from the World’s First Application (eBook)
Product Code: 4433g157
Published Date: January 2002

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