2states brochure 2010

www.2states.com

2States Technology, Inc.

2STATES Modeling & Simulation Two States One Platform

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What is 2STATES

Why 2STATES

2STATES Modeling and Simulation is the most innovative and powerful software for process industries. It is used for building high-fidelity process simulation systems that simulate both steady-state and dynamic behaviors under normal operation conditions as well as startup, shutdown, and other abnormal conditions. The simulation systems can be used for a wide variety of purposes, including process and control system design and validation, equipment sizing and selection, operation analysis, processes or operation optimization, trouble-shooting, simplified model identification for model-based controls, control tuning, and operator training.

Integrating high-fidelity equipment blocks, with built-in sizing, rating and testing methods, 2STATES makes process and control design, optimization and simulation more interactive and more cost effective. Furthermore, the built-in equipment product databases and selection methods allow more accurate equipment sizing and produce the simulation results closer to the actual process.

2STATES is a powerful tool to help engineers perform tasks efficiently in both process design and control design, in trouble-shooting operation issues, fine tuning operation conditions to achieve the optimum results. High-fidelity dynamic simulation makes it possible to simulate the dynamics, operation and control at the early stages of a project to help minimizing uncertainties and risks and achieve an optimum solution. It can expose various problems in a virtual plant to prevent costly mistakes in an actual plant. Below are some of tasks that engineers can use 2STATES to:

◎ Find the inherent and installed flow characteristics of a flow loop◎ Test if valve can be tightly shut-off and its stroking speeds ◎ Detect a valve or pump cavitation problem under certain flow condition◎ Estimate heat exchange fouling resistance based on actual operation data◎ Tune and evaluate PID controllers prior to plant startup or after commissioning◎ Determine a solution for limit cycling in a control loop◎ Obtain and evaluate internal models for MPC and Implement MPC◎ Optimize a process under changing operation conditions ◎ Simulate how an operation unit disturbance affects an entire process

During a simulation, 2STATES provides interfaces and functions for manipulating a process and produces information about process and control. Information includes fluid stream data, valve friction and noise, mismatch of piping and control valve sizes, instability such as limit cycling, valve tight shut-off, choked flow, equipment status, utilities usage and operation profitability.

2STATES Modeling & Simulation www.2states.com

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Virtual Building BlocksThere are many variety of pre-built blocks found in 2STATES. There are general blocks for signal generation and math calculation as well as specific equipment blocks such as pipes, vessels/tanks, valves, pumps, compressors, heat exchangers, reactors, and distillation columns for process industries. For the simulation systems to be accurate in a wide operation scope, 2STATES blocks are modeled, based on first-principles physical and chemical laws and rigorous math and engineering principles.

2STATES can be used to evaluate various solutions and what-if scenarios such as

◎ High friction vs. low friction valves◎ VFD pump vs. control valve◎ Large vs. small buffer tanks◎ PID vs. MPC controllers◎ Trayed vs. packed columns

Taking advantage of various simulation data, an informed decision can be made not only on equipment and operation costs but also on other steady-state and dynamic performance data related to controllability and operation.

Equipment Sizing and Selection Process equipment varies in types and sizes. 2STATES sizing environment in an equipment block can be used to size equipment for a specific process. Sizing fluid stream data may be passed from upstream to minimize data entry errors. The built-in equipment sizing reduces the development time for building steady-state and dynamic simulation systems.

2STATES selection functions in some equipment blocks are used to select a specific product and obtain the product parameters from databases automatically. This greatly reduces the time engineers spent on obtaining the product data for the equipment block and achieves product-based high-fidelity simulation.

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Fluid Property CalculationSetting up fluids in applicable blocks based on built-in fluid component databases and choosing the appropriate fluid property models are very important in equipment sizing and rating as well as steady-state and dynamic simulation. Fluid property models are used to calculate thermodynamic and transport properties such as density, viscosity, thermal conductivity, fugacity, enthalpy and entropy. 2STATES also provides facilities to support user defined fluid components and user-supplied data.

Equipment Rating and TestProcess equipment sizing and selection typically produce multiple options. 2STATES built-in rating and testing methods in equipment blocks are used to evaluate the options. Various steady-state and dynamic tests are conducted and comparisons are made so that engineers can make a more informed choice. Equipment may be further evaluated from steady-state and dynamic simulation tests of its loop-wide, unit-wide even plant-wide systems to determine if the selection is the best.


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Controller Selection and TuningController selection and tuning are important in control design. 2STATES allows control engineers to compare different control strategies and switch among various controllers such as PID and MPC. Engineers can tune controllers and evaluate control performance under various operating conditions and disturbances without “actual” production loss and safety risks. There are built-in model identification blocks to help obtain simplified dynamic models from virtual plants. For a PID controller, various tuning methods are available to estimate PID parameters. High-fidelity dynamic simulation is important for fine tuning controllers and for testing control performance under various operation conditions.

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Graphical User Interfaces2STATES features powerful and user-friendly graphical user interfaces (GUIs) that can be customized to your preference. You can use various user interfaces, such as trends, graphs, data view, and faceplates for monitoring and control during the simulation run. These user interfaces, which are configurable and adjustable, can be opened or closed at any time. With such user interfaces, engineers or operators can interactively change controller modes, modify equipment data, operating conditions and fluid data such as temperature and pressure, feed compositions and controller parameters during the simulation or to run new cases and evaluate alternatives. Dynamic animation of equipment status and operation data makes simulation more informative and efficient. It helps identify existing problems or abnormal operating conditions.


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Building and Simulating SystemsSimulating a process is useful in research, design, startup, operation, trouble-shooting and training. 2STATES features a rich modeling structure and GUI that makes the design and simulation of a process much easier. Dynamic simulation has become particularly important as processes become more complex. To build a process, select the blocks needed and connect them with wires and pipes. Then customize the blocks with sizing and/or selection or modify block parameters. Automatic checks before simulation may expose obvious design mistakes or simulation settings errors. For example, type or engineering unit mismatches of process variable (PV) and setpoint (SP) in controllers, excessive flow velocities in pipes or other equipment, undersized control valves or heat exchangers, vapor entering pumps, and incorrect pipe lengths or diameters.

Rigorous modeling and calculation of individual equipment and fluid properties combined with 2STATES powerful integration methods allow engineers to simulate the behaviors of a process under normal and abnormal operating conditions including startup and shutdown. It helps engineers to identify design flaws, reduce plant startup time, find optimal process and control structures and strategies, thus minimizing energy consumption and increasing the product qualities.

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During a simulation, the system provides functions to manipulate a process and produce information about process and control. Changes or disturbances can be scheduled automatically with built-in functions or blocks or added manually at any time. These changes include production rates, feed composition, temperature or pressure, PID parameters, auto/manual transfer, pump start or stop. Information generated in simulation includes fluid stream data, valve friction and noise, mismatch of piping and control valve sizes, instability such as limit cycling, valve tight shut-off, choked flow, equipment status, utilities usage and operation profitability.

2STATES offers great flexibility to the user in running a simulation. It allows you to change equipment parameters during the simulation. For comparison, you may copy and paste the whole system on the same flowsheet, make any change you want and run it so you can have results to compare during or after the simulation run.


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During a simulation, 2STATES can be configured to dynamically calculate and summarize consumption of utilities such as electricity, instrument air, cooling water and steam. The flow rates of feed stocks and products are also recorded. These dynamic data can be used to estimate operating costs and profitability. Various cost data are important in the equipment sizing, process and control design, operation and maintenance for overall performance of an entire process.

Profitability Analysis

100 Cowing Street Website: www.2states.comWest Roxbury, MA 02132 USA E-mail: [email protected]. 877-339-8880 [email protected]. 501-639-3095 [email protected]

2States Technology, Inc.

2STATES Modeling & Simulation

Steady-State and Dynamic Simulation From Startup to ShutdownHigh-Fidelity, Innovative and PowerfulIntegrated Process Design & Control DesignEquipment Sizing, Controller Tuning, and More…

2states brochure 2010

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