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Implications of process energy efficiency improvements for primary energy consumption and CO2 emissions at the national level

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  • Siitonen, Sari
  • Tuomaala, Mari
  • Suominen, Markku
  • Ahtila, Pekka
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    Abstract

    The improvement of energy efficiency is seen as one of the most promising measures for reducing global CO2 emissions. However, the emission reduction potential may seem different from the industrial plant and policy-maker's perspectives. This paper evaluates the influences of process heat conservation on CHP electricity production, primary energy consumption and CO2 emissions from both the mill site and national perspectives. The results indicate that heat conservation in an industrial process may lead to varying results in primary energy consumption and CO2 emissions, depending on the form of marginal heat production used at the mill site. In the CHP process, reduction of the heat load lowers electricity production, and this reduction may have to be compensated for at the national level. Therefore, the energy conservation potential in industry has to be evaluated by taking into account the connections to the outside society, which means that a wider system boundary than a mill site has to be used. This study demonstrates by theoretical analysis and case mill studies the magnitude of the effects of system boundary definition when evaluating the contribution of an individual energy efficiency investment towards fulfilling the commitment to reduce CO2 emissions at the national level.

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    Bibliographic Info

    Article provided by Elsevier in its journal Applied Energy.

    Volume (Year): 87 (2010)
    Issue (Month): 9 (September)
    Pages: 2928-2937

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    Handle: RePEc:eee:appene:v:87:y:2010:i:9:p:2928-2937

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    Web page: http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/description#description

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    Related research

    Keywords: Energy efficiency System boundary CO2 emissions;

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    Cited by:
    1. Honma, Satoshi & Hu, Jin-Li, 2014. "Industry-level total-factor energy efficiency in developed countries: A Japan-centered analysis," Applied Energy, Elsevier, vol. 119(C), pages 67-78.
    2. Assaf, A. George & Barros, Carlos Pestana & Managi, Shunsuke, 2011. "Cost efficiency of Japanese steam power generation companies: A Bayesian comparison of random and fixed frontier models," Applied Energy, Elsevier, vol. 88(4), pages 1441-1446, April.
    3. Li, Y.P. & Huang, G.H. & Chen, X., 2011. "Planning regional energy system in association with greenhouse gas mitigation under uncertainty," Applied Energy, Elsevier, vol. 88(3), pages 599-611, March.

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