Load-shifting opportunities for a typical South African cement plant

Raine T. Lidbetter, Leon Liebenberg

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Investigations into demand side reductions have been encouraged by the utility in sectors with high electricity consumption, such as the cement industry. It is responsible for 5% of the electrical consumption for the mining and industrial division of the country. It has also been estimated that by 2020 this sector will be ranked fifth for energy savings potential. This paper investigates the potential of a load-shifting scheme to reduce evening peak loads and save electrical costs on a raw mill at a South African cement plant. A simulation was performed, which showed that six hours of load-shifting could be achieved, without adversely affecting production. This was corroborated by a pilot study where the load was successfully shifted for six hours over a week-long period. The specific raw mill would achieve a reduction in yearly electrical costs of 2% when employing this load-shifting strategy. The results however showed that cost-saving opportunities are highly dependent on the reliability of the mills and on the change in production demand. Therefore, load-shifting schemes have to be highly adaptable on a daily basis to shift load when possible.

Original languageEnglish (US)
Title of host publication2011 Proceedings of the 8th Conference on the Industrial and Commercial Use of Energy, ICUE 2011
Pages17-25
Number of pages9
StatePublished - Oct 26 2011
Externally publishedYes
Event8th International Conference on the Industrial and Commercial Use of Energy, ICUE 2011 - Milnerton, Cape Town, South Africa
Duration: Aug 16 2011Aug 17 2011

Publication series

Name2011 Proceedings of the 8th Conference on the Industrial and Commercial Use of Energy, ICUE 2011

Conference

Conference8th International Conference on the Industrial and Commercial Use of Energy, ICUE 2011
CountrySouth Africa
CityMilnerton, Cape Town
Period8/16/118/17/11

ASJC Scopus subject areas

  • Energy Engineering and Power Technology

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  • Cite this

    Lidbetter, R. T., & Liebenberg, L. (2011). Load-shifting opportunities for a typical South African cement plant. In 2011 Proceedings of the 8th Conference on the Industrial and Commercial Use of Energy, ICUE 2011 (pp. 17-25). [6033077] (2011 Proceedings of the 8th Conference on the Industrial and Commercial Use of Energy, ICUE 2011).