Optimum Methods of Operation for LNG Carriers Examining the Major Containment System Designs (eBook)

Published Date

January 1975

Optimum Methods of Operation for LNG Carriers Examining the Major Containment System Designs (eBook)

$19.78
(Excludes any applicable taxes)

This presentation considers the use of evaporated cargo as fuel for the ship on both the loaded and ballast voyages for four typical trade routes. (14pp)

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One of the features of ocean transportation of LNG that makes it a unique operation is the ability of the LNG tanker to utilise its cargo as fuel. Almost all of the presently available (1975) LNG containment systems are designed to carry the cargo at near atmospheric pressure and low temperature. The low temperature necessitates the provision of adequate insulation to protect the ship and control cargo evaporation. The chosen relative efficiency of the insulation defines the rate of continuous evaporation (boil-off) of the cargo. This boiloff may be either burned in the ship's boilers or reliquefied and returned to the cargo tanks.

One of the problems facing operators of LNG carriers is to determine which of these alternatives is preferable from the point of view of vessel economics.

This presentation considers the use of evaporated cargo as fuel for the ship on both the loaded and ballast voyages. The objective is to indicate the most advantageous use of boil-off in the operation of similar size ships fitted with cargo tanks of the self-supporting prismatic, spherical and membrane designs, and to assess their relative merits over four representative trade routes.

Paper Delivered by:
P. L. Vrancken
D. Gordon
(Both of Conch Methane Services Ltd., London)

Prepared for:
Gastech Paris 1975

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: Optimum Methods of Operation for LNG Carriers Examining the Major Containment System Designs (eBook)
Product Code: 4433g041
Published Date: January 1975

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