Comparison of Spherical and Membrane Large LNG Carriers in Terms of Cargo Handling (eBook)

Published Date

January 2005

Comparison of Spherical and Membrane Large LNG Carriers in Terms of Cargo Handling (eBook)

$19.81
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This paper describes the different cargo handling characteristics of the spherical and membrane systems (7pp)

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This study presents a comprehensive comparative analysis of spherical and membrane large LNG carriers with respect to cargo handling. The spherical Moss and the Mark III membrane types have the capacity of 185,000 m3 and 204,000 m3, respectively. The study includes analyses on boil-off gas generation rate, cargo tank warm-up and cooldown, cargo offloading, residual cargo handling, and comparative safety analysis. The boil-off gas generation rate is estimated as a function of insulation thickness. For a carrier without a steam turbine propulsion system, irrespective of the types, the boil-off gas should be liquefied in a reliquefaction unit.

The heat ingress into the piping and its elements are found to have a significant influence on the gas temperature entering the unit. Tank warm-up and cooldown study shows the flexibility mainly governed by the thermal stress and consequently the plausible tank temperature variation limits. The two types of LNG carriers show little variation in cargo offloading rate, but considerable difference in the amount of residual cargo. This residual cargo should be treated in a proper way. The comparative safety analysis of the two LNG carriers shows the relative advantages and disadvantages over each other.

Paper Delivered by:
Kiho Moon
Daejun Chan
Donghun Lee
Myung-Bae Kim
Ho-Jong Ahn
Jong-Pil Ha
(all from Hyundai Heavy Industries, Co. Ltd)

Prepared for:
Gastech Bilbao 2005

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: Comparison of Spherical and Membrane Large LNG Carriers in Terms of Cargo Handling (eBook)
Product Code: 4433g090
Published Date: January 2005

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