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Variables affecting energy efficiency and CO2 emissions in the steel industry

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  • Siitonen, Sari
  • Tuomaala, Mari
  • Ahtila, Pekka

Abstract

Specific energy consumption (SEC) is an energy efficiency indicator widely used in industry for measuring the energy efficiency of different processes. In this paper, the development of energy efficiency and CO2 emissions of steelmaking is studied by analysing the energy data from a case mill. First, the specific energy consumption figures were calculated using different system boundaries, such as the process level, mill level and mill site level. Then, an energy efficiency index was developed to evaluate the development of the energy efficiency at the mill site. The effects of different production conditions on specific energy consumption and specific CO2 emissions were studied by PLS analysis. As theory expects, the production rate of crude steel and the utilisation of recycled steel were shown to affect the development of energy efficiency at the mill site. This study shows that clearly defined system boundaries help to clarify the role of on-site energy conversion and make a difference between the final energy consumption and primary energy consumption of an industrial plant with its own energy production.

Suggested Citation

  • Siitonen, Sari & Tuomaala, Mari & Ahtila, Pekka, 2010. "Variables affecting energy efficiency and CO2 emissions in the steel industry," Energy Policy, Elsevier, vol. 38(5), pages 2477-2485, May.
    • Handle: RePEc:eee:enepol:v:38:y:2010:i:5:p:2477-2485
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    References listed on IDEAS

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