ADVANCED LNG CARRIER WITH ENERGY SAVING PROPULSION SYSTEMS TWO OPTIONS.pdf

Poster PO-31
ADVANCED LNG CARRIER WITH ENERGY SAVING
PROPULSION SYSTEMS: TWO OPTIONS
METHANIER DE POINTE AVEC SYSTEMES DE PROPULSION
A ECONOMIE D’ENERGIE : DEUX OPTIONS
Hiroyuki Ohira
Yoshihiro Suetake
Masaru Oka
Mitsubishi Heavy Industries, Ltd. (MHI)
Tokyo, Japan
ABSTRACT
Reduction of ocean transportation costs is a never-ceasing aim in the case of LNG
transportation chain operations. To further this goal, such methods as enlarging the size of
carriers to raise efficiency and reduction of fuel costs through the use of advanced plant
systems are being studied around the world. In this paper, two options for low fuel cost
propulsion systems that have been developed and their use for next-generation LNG
carriers are presented:
1. DRL: two stroke Diesel main engine + boil off gas Re-Liquefaction plant:
Concerning re-liquefaction plant, MHI has developed a next-generation plant and is
using on-going feedback based on the actual performance of this plant, which has been
installed and is in mercial use, for the purpose of establishing the level of
improvement in both efficiency gained from using a re-liquefaction plant and in safety
and operating reliability.
2. SST: Simplified and Superior efficiency steam Turbine propulsion;
Steam turbine plants have been used for most LNG carriers because of their high
operating reliability and flexibility of available fuel.
However, compared to land-based power plants, the rate of development in this area
has been lagging. MHI has recently developed and is offering a new steam turbine plant
with vastly improved fuel consumption efficiency while retaining the important features
of high reliability and ease of operation.
RESUME
La réducution des coûts de transport maritime est un but perpétuel en ce qui concerne
les activités en série du transport de GNL. Afin d’atteindre cet objectif, les méthodes
consistant à agrandir la taille des méthaniers pour augment