Pinch Sliding Approach for Targeting Hydrogen and Water Networks with Different Types of Purifier

Purifiers are widely used in refinery hydrogen networks. The placement of purifiers is critical in reducing the utility consumption. Various conceptual methods have been employed to find the optimal placement of the purifier inside the hydrogen network. However, previous research only adopts the performance based purifier model, leaving the mechanism based purifier model behind. More practical and simplified approaches are expected to deal with the complicated mechanism models. This paper improves the existing graphical approach in two aspects: incorporate algebraic equations into graphical methods to find the initial location of purifiers with complicated models; develop a novel pinch sliding approach to simplify the shifting procedure of composite curves. In this method, both performance based and mechanism based models of purifier can be solved. Another advantage of this targeting approach is that the flow rate of streams to the purifier also can be optimized simultaneously. Case studies indicate that ...

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