화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.93, 394-406, January, 2021
DOI10.1016/j.jiec.2020.10.018  Export Citation
Exergy analysis and multi-objective optimisation for energy system: a case study of a separation process in ethylene manufacturing
Feifei Shen1, Meihong Wang1, 2, †, Lingxiang Huang1, and Feng Qian1, †
  • 1Key Laboratory of Advanced Control and Optimization for Chemical Processes, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China
  • 2Department of Chemical and Biological Engineering, The University of Sheffield, Sheffield S1 3JD, United Kingdom, China
E-mail:,
In chemical industry, most processes face the challenge of high energy consumption. The approach presented in this study can reduce the energy footprint and increase efficiency. The energy system of a separation process in ethylene manufacturing is used to demonstrate the effectiveness of the approach. The chilling train system of the separation process in a typical ethylene plant consumes most cooling and provides appropriate feed for distillation columns. The steady state simulation of system was presented and the simulation results were proved accurate. The conventional exergy analysis identifies that Dephlegmator No.1 (a heat exchange and mass transfer device) has the highest exergy destruction (1401.28 kW). Based on advanced exergy analysis, Dephlegmator No.1 has the highest rate of avoidable exergy destruction (89.04 %). Finally, a multi-objective optimisation aiming to maximise system exergy efficiency and to minimise operational cost was performed and the Pareto frontier was obtained. The multi-objective optimized exergy efficiency is 79.53 % (improved by 0.61 %) and the operational cost is 0.02031 yuan/kg (saved by 11.19 %). This study will guide future research to reduce energy consumption in process manufacturing.
Keywords:Ethylene manufacturing;Separation process;Steady state simulation;Exergy analysis;Process optimisation
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