Applications Experience

Liquefaction

Advanced process control
LNG plants have to meet annual production targets whilst responding to fluctuating demand for LNG, maximizing production when demand is at a peak and maximizing energy efficiency during periods of lean demand. In addition, fluctuating product prices are driving plant managers to maximize production of either LPG or LNG. Such frequent changes in operating strategies can be easily managed with advanced process control (APC). Loose control of LPG and LNG specifications can result in either off-specification products can be severe. Consequently, most plants operate above the minimum specifications. APC stabilizes a plant and enables it to be operated closer to the minimum specifications. The application of APC can be of significant benefit for LNG plants. Projects have shown an attractive return on investment, a remarkable improvement in the stability of plant operation, and a very significant reduction in manual interventions.

25 % of liquefaction plants use a Yokogawa DCS.

36 % of liquefaction plants have a Yokogawa APC solution.

Applications

Distributed Control System [CENTUM VP]

LNG Process

-	Sulfur Removal Unit
-	CO2 Removal Unit
-	Dehydration Unit
-	Mercury Removal Unit
-	Fuel Gas Compressor Unit
-	Fractionation Unit
-	Refrigeration Unit
-	Propane Compressor Unit
-	MR Compressor Unit
-	Liquefaction Unit

Utilities

-	N2 Unit
-	Generator Unit
-	Cooling Water Unit
-	Waste Water Unit
-	Boiler Unit
-	Electrical Distribution Unit

Storage & Loading

-	LNG / LPG Transfer Line
-	LNG / LPG Tank Storage
-	Condensate Unit
-	BOG Compressor
-	Flare Unit

Safety Instrumented System [ProSafe-RS]

-	Process Safety System
-	Emergency Shutdown System
-	Fire & Gas System
-	High Integrity Process Protection System (HIPPS)

Operator Training System [Omegaland]

Advanced Process Control [APC]

-	Multivariable Predictive Control [Exasmoc]
-	Quality Estimator [Exarqe]
-	Surge Volume Control [Exacoast]

Plant Information Management System [Exaquantum]

Asset Management System [PRM]

Flow Computer [STARDOM]

Field Sensors

-	Pressure Transmitter for Process [EJA]
-	Flow Transmitter for Process [EJA / YEWFLO]
-	Level Transmitter for Process [EJA]
-	Temperature Transmitters [YTA]
-	Coriolis Mass Flowmeter [ROTAMASS]

Analytical Products

-	Gas Chromatographs [GC1000MarkII]

Equipment Integration

-	Uninterruptible Power System
-	Tank Gauging System
-	Machine Monitoring System (MMS)
-	Pipeline Management System (PMS)
-	Laboratory Information Management System (LIMS)
-	Dynamic Training Simulator (DTS)
-	Motor Operated Valve (MOV)
-	Analyzer Package

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Success Stories

Skangass AS, Stavanger, Norway
CENTUM VP, ProSafe-RS, GC1000, RotaMass, FAST/TOOLS
OTS for familialization of liquefaction processes and operator training. Yokogawa’s integrated solutions contribute to safe and steady production at gas liquefaction plant in Norway.

PT Badak Natural Gas Liquefaction, Indonesia
Bontang LNG Production Complex Control System
Eight LNG trains integrated into a single control system. Increased steam production and boiler response with improved production downtime.

BBE & BBG Plants, Spain
800 MW, gas fired, greenfield site
Combined cycle power plant with regasification facility realizes stable power supply.