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

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  • Oladiran, M.T.
  • Meyer, J.P.

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.

Suggested Citation

  • Oladiran, M.T. & Meyer, J.P., 2007. "Energy and exergy analyses of energy consumptions in the industrial sector in South Africa," Applied Energy, Elsevier, vol. 84(10), pages 1056-1067, October.
    • Handle: RePEc:eee:appene:v:84:y:2007:i:10:p:1056-1067
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