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ever, a trust-region envelope is essential for optimization as a ROM is accurate only around the point where it is constructed. Optimization with a trust-region is successfully demonstrated for a H2-CH4 PSA case study. Promising preliminary results encourage us to formally devise a systematic adaptive trust-region strategy. We first develop an exact penalty trust-region al- gorithm and devise correction schemes to ensure convergence to actual local optimum. When demonstrated for the Skarstrom cycle for CO2 capture, penalty algorithm converges in 92 iter- ations and 1.88 CPU hrs. To circumvent the difficulty of determining a penalty parameter, we also devise a hybrid filter-based trust-region framework. When applied to the PSA case study, filter algorithm converges within 51 iterations consuming 1.36 CPU hrs. Thus, initial results are quite promising and reveal the potential of using ROMs for optimization. ivPDF Image | Design and Operation of Pressure Swing Adsorption Processes
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