Astillero Sestao shipyard is developing a new 148,000 m3 LNG design, which will
represent a step ahead in gas carriers.
A CSI containment
system has been selected for the project as the latest state of the art
in membrane technology, that in fact gathers together the best features of previous
Machinery arrangement consists on two independent propulsion plants with slow speed
diesel engines whose operation is combined with a redundant re-liquefaction plant.
This concept has proved several advantages over different propulsion configurations
after comprehensive comparisons among them. The advantages are mainly economical but
also operational and environmental.
The re-liquefaction technology allows the boil-off gas to be compressed and re-injected
again into the cargo tanks, so that a cheaper fuel like Heavy Fuel Oil can be used for
propulsion. After many years of development and several model plants under operation, this
has proven to be a definitive and reliable technology that will mark the future, Astillero
Sestao technical team claims.
Astillero Sestao shipyard has been also involved in researching different technologies
for LNG vaporization and their suitability for aboard installation on the deck of an LNG
These studies have focused on the way in which the specific systems
required such as Dynamic Positioning, Submerged Turret System, Regasification Plant, etc,
can be integrated into a conventional LNG design. Special problems in relation with the
discharge to floating terminals
and their solutions have been studied, such as partial fillings in cargo tanks or the response to steam turbine durins dynamic positioning operation.
Astillero Sestao shipyard currently is heavily involved in a series of other innovative
projects related to gas transport under pressure.