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    Energy and exergy analyses of energy consumptions in the industrial sector in South Africa

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    Main article (773.4Kb)
    Date
    2007
    Author
    Oladiran, M.T.
    Meyer, J.P.
    Publisher
    Elsevier http://www.elsevier.com
    Link
    http://www.doi:10.1016/j.apenergy.2007.02.004
    Type
    Published Article
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    Abstract
    The energy-utilization over a 10-year period (1994–2003) has been analysed for the South African industrial sector, which consumes more primary energy than any other sector of the economy. Four principal sub-sectors, namely iron and steel, chemical and petrochemical, mining and quarrying, and non-ferrous metals/non-metallic minerals were considered in this study. Primary-energy utilization data were used to calculate the weighted mean energy and exergy efficiencies for the sub-sectors and then overall values for the industrial sector were obtained. The results indicate that exergy efficiency is considerably lower than energy efficiency in all the sub-sectors, particularly in mining and quarrying processes, for which the values were approximately 83% and 16%, respectively. The performance of exergy utilization in the industrial sector can be improved by introducing various conservation strategies. Results from this study were compared with those for other countries.
    URI
    http://hdl.handle.net/10311/957
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    • Research articles (Dept of Mechanical Engineering) [48]

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