Process Simulators and Aspen Custom Modeler

As mentioned earlier, some process models are not available in the simulators such as Aspen Plus. In such situations, ACM can be used to implement models available in the literature or newly developed models. Subsequently, these ACM models can be included in Aspen Plus and/or Aspen HYSYS for use like built-in models in any process. The above model for gas separation using membrane (Section 4.2.3) can be implemented and solved in ACM see Appendix 4A for more details on the ACM model for no permeate mixing membrane module. In order to implement the membrane model in ACM, all chemicals are defined from the component list in the Aspen Properties User Interface program, and then 

In ACM, all the model equations are solved simultaneously, and so degrees of freedom are important. The ACM code is compiled using function key F8. As described in Appendix 4A, an icon can be drawn to represent the membrane model. 

This membrane model in ACM can now be used with other process models in ACM itself. In order to use it in Aspen Plus, the membrane model in ACM has to be saved as a. msi file using the export wizard in ACM and Microsoft C++ compiler ACM V7.3 requires use of the Professional/Premium/Ultimate edition of Microsoft Visual Studio 2008, whereas ACM V8.0-8.6 require the Professional/Premium/Ultimate edition of Microsoft Visual Studio 2010. Subsequently, the. msi file can be installed in Aspen Plus and/or Aspen HYS YS library for use like built-in models in simulating chemical processes. 

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