Marine

Rosemount

Shell creates worlds rst oating LNG production

vessel, using Rosemount CMS

RESULTS

• Flexible system architecture enables future adaptions

• Improved operator efciency

• Maintenance efciency improvements

• Maximize inherent safety by a fully-integrated automation system

“the project needed

proven, state-of-the-

art solution backed

by superior technical

expertise”

The Prelude FLNG facility will be 488m

long, 74m wide and will displace around

600,000 tonnes of water. It will be the

largest oating offshore facility in the

world.

APPLICATION

Shell has developed a oating LNG (FLNG) system consisting of a number

of sub-sea wells connected to a barge. The barge serves to support the gas

treatment facilities and liquefaction plant, and to provide storage volume

for the produced LNG. The $10 billion investment will be the world’s largest

vessel and rst offshore LNG facility. Beginning in 2017, the vessel will produce

3.6 million tons of LNG, 1.3 million tons of condensate and 0.4 million tons of

LPG per year.

Cargo monitoring system in LNG, LPG, condensate and slop tanks with overll-

and high level monitoring.

Level monitoring in integral- & free standing tanks, including oil water

interface measurements in several tanks.

CUSTOMER

Royal Dutch Shell.

CHALLENGE

When Shell was designing the concept for the offshore production of LNG it

was important to be economically and technically competitive with onshore

LNG production. The suppliers invited to participate in the development of the

project were to deliver the best solution and technical support so that the nal

design was a solution that minimized technical risk and enhance productivity.

Because this is the rst oating liquid natural gas production vessels in

the world, the project needed proven, state-of-the-art solution backed by

superior technical expertise. The new developed process also required more

exible solutions and fewer equipment items in order to maximize the units’

operation. The systems designed have to remain on-site at full sea for at least

20 years, so operability and reliability was demanded and low life cycle cost as

well.

High safety was another prime consideration and therefore solution reducing

the risk to escalation of events was chosen.

Marine

For contact information, addresses and

facts about our global sales and service

network, please visit:

www.Emerson.com/marine

The Emerson logo is a trademark and service mark of Emerson Electric Co. Rosemount and

Rosemount Logotype are trademarks of Rosemount Inc. Damcos trademark and logotype are

trademarks of Damcos A/S. LevelDatic is a trademark of Rosemount TankRadar AB.

In total more than 160 Rosemount 5300

and Rosemount 5400 are used to monitor

the levels in the integral tanks

SOLUTION

A multi-disciplinary expert team from Emerson was engage early in the

project to design a unique fully integrated automation solution, deliver

maximum uptime, cost effectiveness and safety. With DeltaV™ and

Rosemount Cargo Monitoring system from Emerson a proven state-of-the-art

solution has been developed.

The Cargo Monitoring system includes surveillance and measurement

of LNG/LPG tanks, condensate, slop and other tanks. With Rosemount

Cargo Monitoring System connected to the DeltaV™ system a complete

measurement and control system was provided.

Reliable and accurate level measurements of the LNG and LPG tanks are

attained with the new developed still pipe radar gauge, Rosemount TankRadar

2 in 1. The radar gauge is unique by its design with two level measuring

channels, doubled pressure and up to 6+6 temperature spot sensors in same

tank penetration. Fewer connection boxes per tank meet the requirements

of cost effective and painless installation inside as well as outside the tanks. It

also minimizes the risk of water intrusion and maintenance.

With the prior use SIL approved Rosemount 5300 and Rosemount 5400, the

level measurements for the IPS are handled with integrity and high reliability.

The demand for oil water interface measurement was solved with the

Rosemount 5300 developed for challenging level and interface measurements

on liquids.

For many of the integral tanks the Rosemount 5400 gauges is applied. The

gauge is known for its high measurement reliability, because of Dual Port

Technology that enables a stronger signal.

In total more than 160 Rosemount 5300 and Rosemount 5400 are used to

monitor the levels in the integral tanks, e.g. ballast.

For the rest of the tanks Rosemount CMS TGU 55 measure the level in the

condensate and slop tanks.

The high sensitivity radar transmitter Rosemount CMS TGU 56 will measure

draft. The gauge is an intelligent 4-wire, non-contacting radar level

transmitter.

With the well-proven Rosemount gauges it is possible to handle the level

monitoring of the FLNG in a cost-effective and safe way. The LNG monitoring

being done with CTS performance includes the operative requirement of

verication during operation.