The design of a dynamic simulation system of a liquid chemical filling process
The flow sheet and operation principle of a liquid filling process was briefly discussed, and the dynamic simulation mathematic models of the filling process were developed in detail using the mass balance equations, gas state equations and historical process data. Based on the intelligent process control (IPC) simulation mode, the overall structure and the development scheme of the filling process simulation system was designed. A dynamic simulation system of the filling process was successfully developed, by taking a typical SCADA (supervisory control and data acquisition) configuration software named Century Star as GUI (graphical user interface) development platform, and integrating with a DLL (dynamic link library) function program to perform the calculation of the simulation models programmed using Visual C++. The development of the simulation GUI included the design and Command Language programming of simulated process flow sheet diagrams, simulation command buttons and their displaying diagrams, and the operation and parameters adjustment diagrams of all kinds of manipulators in the process flow sheets. The overall simulation operation of the filling process was fairly good achieved. Then some comprehensive and systematic simulation tests of the filling process were carried out. The simulation results show that the simulation system could satisfy the filling process research and design requirements very well, and the main process operation parameters were optimized through these simulation tests.
Development of a fine chemical process operator-training simulator
Fine chemical processes usually are very complex, and their operations are heavy and complicated. The success operations of fine chemical processes require high skill operators. As there are lots of limitations to use real fine chemical production plants to train operators, we need to develop process operation simulation training system to train process operators. However, the traditional development methods of process operation simulation training system are inconvenient due to their poor modularity, so new development strategies of process operation simulation training system with high efficiency should be studied. In this paper, a new Supervisory Control and Data Acquisition (SCADA) simulation-mode is put forward according to the operation training characteristics of fine chemical production processes. The SCADA mode process simulation system is developed using SCADA software to design graphical user interface (GUI), and integrating with simulation models built by the combination of process mechanics modeling method and dynamic compensation modeling method through the design of a kind of dynamic link library (DLL) function. The SCADA mode process simulation system is more modularized; and it can be more conveniently developed than the traditional process simulation system. The SCADA mode training simulator is successfully applied to the simulation operation training of a fine chemical production process. The training results show that the simulation operation of the SCADA mode training simulator is vivid and it is very similar to the operation of the real plant. The SCADA mode training simulator satisfies the process training requirements quite well, and the operation training effect and efficiency is highly improved.
An Object-Oriented Framework for Parallel Incompressible Flow Simulations
The coupling and domain decomposition techniques combined with extensive use of object-oriented programming techniques will result in an efficient, flexible, and systematic process for producing parallel partial differential equations codes. This paper discusses important issues regarding the implementation of an object-oriented framework for simulating incompressible flow using parallel computers.