Dividing wall columns (DWCs) have been widely studied over the last decade, mainly because of their potentials in energy and capital savings. It is often stated that no commercial simulation software package offers DWC as a standard module; hence engineers employ multi-column models for simulations of such columns. In such simulations, a DWC is divided into different independent segments, with each segment modeled using a conventional column model. However, this sequential solving approach is sometimes challenging when the column system is complicated. A parallel column model is proposed in this research that is equation-based in nature. That means all of the equations that describe the column system are solved at the same time. The proposed model is shown capable of modeling DWCs of arbitrary configurations. Extensive DWC simulations are used to test the model, and it is concluded that the equation-based PCM exhibits better numerical performance, compared to sequential-modular multi-column models.
The parallel column model is validated using the pilot DWC data from University of Texas at Austin; good agreement is observed between model predictions and experimental data. The CAPE-OPEN is a standard allowing interoperability between different simulation software. The parallel column model is a CAPE-OPEN compliant and can be used in any CAPE-OPEN compliant process flowsheet simulation package as a standard DWC module. Examples of flowsheet intensification using the parallel column model in a CAPE-OPEN flowsheet simulation package are demonstrated.
|Commitee:||Baltus, Ruth E., Du, Yuncheng, Martinez, Marcias J., McCluskey, Richard J., Taylor, Ross|
|School Location:||United States -- New York|
|Source:||DAI-B 80/11(E), Dissertation Abstracts International|
|Keywords:||Dividing wall columns, Equation-oriented, Modeling, Simulation|
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