April 15, 2005 -- Version 4.0 includes a new pressure flow solver that simplifies simulation configuration while improving performance and maintaining solution robustness. The new version is also enhanced to identify the minimum information required to develop and execute a dynamic simulation model, allowing users to quickly develop simulations without sacrificing flexibility and functionality for the advanced user. The software includes enhancements to the controller algorithms designed to enable them to more closely match the control algorithms found in actual plant control systems. Users can also interface with a thermodynamic data management system to customise component and thermodynamic data. In addition, Version 4.0 has a valve sizing utility and has been enhanced to provide more accurate vessel depressuring calculations.

As part of SimSci-Esscor’s SIM4ME common modeling environment, the DYNSIM simulator enables users to leverage simulation model equity, providing a powerful, cost-effective improvement over legacy dynamic simulators. It excels in plant simulation by allowing the use of the same model in multiple applications such as process design studies, control evaluations and checkouts, operator training, and operational analysis.

The DYNSIM software is integrated with SimSci-Esscor’s flagship PRO/II process simulation program that performs rigorous mass and energy balances for a wide range of plant processes. The solution opens and automatically translates steady-state PRO/II simulations into DYNSIM dynamic simulations. Starting from existing PRO/II simulations increases engineering efficiency since less time is required to redevelop models for each application. Also, data discrepancies can be avoided when engineers deploy the same model in each application, which increases technical accuracy and provides higher levels of overall simulation reliability.

“As part of the SIM4ME development roadmap, SimSci-Esscor continues to advance the DYNSIM product’s position as the leading dynamic simulator in the process industries with new releases that deliver significant value to our customers,” said Alastair Fraser, vice president of Invensys’ SimSci-Esscor unit. “Customers can exploit their existing model equity in the PRO/II simulations to gain advantages over the entire plant life span.” Engineers and operators can use the DYNSIM software to perform basic design studies, operational troubleshooting, control system checkouts and comprehensive evaluations of standard and emergency operational procedures. It enables superior control system design and revamp while shortening commissioning time. It can routinely help prevent production interruptions while increasing plant efficiency and safety. Operators can also use it to improve and test emergency response procedures to prevent expensive equipment damage in a risk free environment.

The DYNSIM software is part of SimSci-Esscor’s Dynamic Simulation Suite (DSS), which provides the full power of rigorous dynamic simulation and control emulation for plant engineers, operators, and managers. DSS programs include the DYNSIM simulator, the FSIM Plus Foxboro I/A emulator and the TRISIM Plus Triconex emulator.

The DYNSIM dynamic simulation program is powered by the SIM4ME common modeling environment, which is designed by SimSci-Esscor to help businesses build open computing solutions for the process industries. Based on a model-centric design, the SIM4ME environment hosts SimSci-Esscor’s comprehensive process simulation, optimization and control system emulation programs.

For more information about SimSci-Esscor, please go to
http://www.simsci-esscor.com/us/eng/company/default.htm

About SimSci-Esscor
SimSci-Esscor, an operating unit of Invensys plc, is a leader in the development and deployment of industrial process simulation software and systems for a variety of industries, including oil and gas production, petroleum refining, petrochemical and chemical manufacturing, electrical power generation, mining, pulp and paper, and engineering and construction. SimSci-Esscor solutions enable clients to minimise capital requirements, optimise facility performance, and maximise returns on investments in producing assets. SimSci-Esscor supports more than 750 client companies in more than 70 countries. For more information, visit the SimSci-Esscor Web site at www.simsciesscor.com.

About Invensys
Invensys is an automation, controls and process solutions Group working to create value for customers and investors. Our products, services, expertise and ongoing support enable intelligent systems to monitor and control processes in many different environments. The businesses within Invensys help customers in a variety of industries - including hydrocarbons, chemicals, oil and gas, power and utilities, rail, telecommunications, paper, food and beverage, dairy, pharmaceuticals and personal care - to perform with greater efficiency, safety and cost-effectiveness.

Process Systems (IPS) provides products, services and solutions for the automation and optimisation of plant operation in the process industries. APV specialises in process equipment engineered into systems and asset services for food, beverage, personal care, pharmaceutical and chemical clients. Eurotherm is a leading supplier of control and measurement instrumentation solutions and services to industrial and process customers. Rail Systems is a multinational leader in the design, manufacture, supply, installation, commissioning and maintenance of safety-related rail signalling and control systems. Climate Controls is a major provider of the components, systems and services used across the world to make commercial and residential environments safer, more comfortable and more efficient. Appliance Controls has the broadest system and component offering for the appliance industry worldwide.

The Invensys Group is headquartered in the UK and listed on the London Stock Exchange. With 35,000 employees operating in 60 countries, Invensys helps customers to improve their performance and profitability, building value for end users and shareholders alike.

Invensys;, Wonderware; Foxboro; Marcam; Triconex; SimSci-Esscor; Digital Coriolis; DolPhin; APV; and Eurotherm, PRO/II, are trademarks or servicemarks of Invensys plc, its subsidiaries and affiliated companies. All other brands and product names may be the trademarks of their respective owners.

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