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OLI DynaChem After you complete a steady-state model, you are only half-finished! Most processes require dynamic simulation to study startup, shutdown, upsets, process control, surge tank sizing, and many other design parameters. DynaChem is a dated yet highly flexible dynamic simulation program used to model time-dependent behavior of processes, pilot plants or even aqueous systems in the natural environment. Whether it is control strategy, response to upsets, scheduled waste streams, controller tuning, startup and shutdown, or any other unsteady state condition you want to examine, DynaChem provides an accurate and stable environment for your study. DynaChem allows multiple process units, which are tied together with process streams and, where applicable, process control to be modeled using the same thermodynamic framework and in-place Databank used by all other OLI programs, including ESP. 
The difference, of course, is that DynaChem simulates the time-dependent (dynamic) nature of a process with a very stable computational technique. |
DynaChem specifics DynaChem is based upon modular process units and nodes. It is generalized to the point that virtually any chemical process, laboratory system or element of the natural environment can be modeled. DynaChem provides the capabilities for : Tank Units with multiple valved and unvalved exits at any tank level allow phase separation by density Pipe Units with multiple exits allowing for physical phase separation into aqueous, organic, solid and vapor with the option of suspended solids, entrained liquids, liquids dissolved in solids and vapor dissolved in liquid Entry Units with scheduled or continuous feeds, allowing for initiation and termination at specified times, ramped or step flow changes, specified durations, repeated intervals, controller and valve control Manual and automatic valves Choice of control algorithm including PID (velocity and positional), switch, multicascade, trim, ratio Pump specification and control Implicit and explicit dead time Scheduled parameter adjustment - virtually any parameter can be set to change at a specified time Restart capabilities including Log Node which allows a process to be stored over time and used as an input to another dynamic process or Snapshot which stores the entire process as a specified time Operator Mode interactive intervention to allow adjustment of control parameter settings, valve settings, feed stream flow, introduction of system upsets, even equipment sizing and geometry changes. |