Inderscience Publishers

Minimisation of exergy destruction in an ethane recovery turboexpander process using Aspen Plus process simulator

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Energy and exergy analyses as well as optimisation towards minimum exergy destruction are accomplished by integrating Aspen Plus process simulator and the optimisation-related features of MATLAB for a turboexpander plant where the recovery of ethane as a natural-gas-liquid product is achieved. Exergetic performance of an ethane recovery turboexpander process under multi-feed scenario (different feed compositions) is also investigated for the first time in the literature. Although the exergy destruction of the multi-feed process is relatively higher compared with the individual processes designed separately for each feed scenario, considering the overall capital-cost requirement, the feed-flexible process has superiority.

Keywords: exergy analysis, flexible design, optimisation, NGLs, natural gas liquids, ethane recovery, turboexpanders, Aspen Plus, MATLAB, exergy destruction, process simulation, multi-feed processes

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