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Multi-stage stochastic programming for integrated optimization of ethylene production processes and utility systems under uncertainty

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  • Zhao, Liang
  • Rong, Jiyun
  • Ma, Guofu
  • Liang, Chen
  • Long, Jian

Abstract

Multiple time-scale uncertainties in equipment efficiency, process demand, and steam prices pose significant challenges to the modeling and optimization of ethylene production processes and utility systems. This paper introduces a novel multi-stage stochastic programming (MSSP) framework that integrates advanced linearization techniques and data augmentation via a Wasserstein generative adversarial network (WGAN), providing a robust solution for improving energy conversion efficiency and optimizing ethylene production processes with utility systems under uncertainty. A three-stage stochastic programming model addresses the impacts of uncertainties across different time scales. Nonlinear terms in the model are linearized using the McCormick envelope method to simplify the solution process, and a WGAN generates simulated data to augment the dataset. The effectiveness of the proposed method was validated in a real-world ethylene plant case study, where optimization results showed a 3.9 % increase in net profit, a 3.5 % increase in ethylene yield, and a 6.5 % decrease in the cost of the utility system compared to traditional methods.

Suggested Citation

  • Zhao, Liang & Rong, Jiyun & Ma, Guofu & Liang, Chen & Long, Jian, 2025. "Multi-stage stochastic programming for integrated optimization of ethylene production processes and utility systems under uncertainty," Energy, Elsevier, vol. 320(C).
    • Handle: RePEc:eee:energy:v:320:y:2025:i:c:s0360544225009375
    DOI: 10.1016/j.energy.2025.135295
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    References listed on IDEAS

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