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Industrial overcapacity can enable seasonal flexibility in electricity use

Author

Listed:
  • Ruike Lyu
  • Anna Li
  • Jianxiao Wang
  • Hongxi Luo
  • Yan Shen
  • Hongye Guo
  • Ershun Du
  • Chongqing Kang
  • Jesse Jenkins

Abstract

In many countries, declining demand in energy-intensive industries (EIIs) such as cement, steel, and aluminum is leading to industrial overcapacity. Although industrial overcapacity is traditionally envisioned as problematic and resource-wasteful, it could unlock EIIs' flexibility in electricity use. Here, using China's aluminum smelting industry as a case study, we evaluate the system-level cost-benefit of retaining EII overcapacity for flexible electricity use in decarbonized energy systems. We find that overcapacity can enable aluminum smelters to adopt a seasonal operation paradigm, ceasing production during winter load peaks that are exacerbated by heating electrification and renewable seasonality. This seasonal operation paradigm could reduce the investment and operational costs of China's decarbonized electricity system by 23-32 billion CNY/year (11-15% of the aluminum smelting industry's product value), sufficient to offset the increased smelter maintenance and product storage costs associated with overcapacity. It may also create labor complementarities between the aluminum and thermal power sectors.

Suggested Citation

  • Ruike Lyu & Anna Li & Jianxiao Wang & Hongxi Luo & Yan Shen & Hongye Guo & Ershun Du & Chongqing Kang & Jesse Jenkins, 2025. "Industrial overcapacity can enable seasonal flexibility in electricity use," Papers 2511.22839, arXiv.org, revised Apr 2026.
    • Handle: RePEc:arx:papers:2511.22839
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    References listed on IDEAS

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