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

M.T. Oladiran and J.P. Meyer

Applied Energy, 2007, vol. 84, issue 10, 1056-1067

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.

Keywords: Energy; Exergy; Industrial; energy-consumption; South; African; energy-utilization (search for similar items in EconPapers)
Date: 2007
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Citations: View citations in EconPapers (20)

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