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Case study: Energy savings for a deep-mine water reticulation system

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  • Vosloo, Jan
  • Liebenberg, Leon
  • Velleman, Douglas

Abstract

In deep level mining, water reticulation systems are one of the major consumers of electricity. The refrigeration plants, together with the underground water supply and dewatering systems are integrated to form one complete water reticulation system. This integrated water reticulation system extracts hot water from the mine, cools it down and returns the cold water to the various underground mining levels. As much as 42% of the total energy consumption on a typical deep level gold mine can be ascribed to the water reticulation system. Reducing the overall water demand and therefore electricity costs will depend on climatic conditions, operating strategy, water reservoir capacity, and electricity tariff rates. In this paper, a method is presented to determine the optimum water reticulation strategy for different electricity tariffs. This model minimises the total operating cost of the water reticulation system by a trade-off between the cost involved in providing effective pump control and the savings achieved under a specified electricity tariff. A case study of a typical deep mining operation shows that a reduction of 65% during peak demand and 2% overall electricity reduction is possible by adopting this new control strategy. The corresponding savings in operating cost is 13%.

Suggested Citation

  • Vosloo, Jan & Liebenberg, Leon & Velleman, Douglas, 2012. "Case study: Energy savings for a deep-mine water reticulation system," Applied Energy, Elsevier, vol. 92(C), pages 328-335.
    • Handle: RePEc:eee:appene:v:92:y:2012:i:c:p:328-335
    DOI: 10.1016/j.apenergy.2011.10.024
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    References listed on IDEAS

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    1. Pelzer, R. & Mathews, E.H. & le Roux, D.F. & Kleingeld, M., 2008. "A new approach to ensure successful implementation of sustainable demand side management (DSM) in South African mines," Energy, Elsevier, vol. 33(8), pages 1254-1263.
    2. Ashok, S. & Banerjee, R., 2003. "Optimal cool storage capacity for load management," Energy, Elsevier, vol. 28(2), pages 115-126.
    3. Middelberg, Arno & Zhang, Jiangfeng & Xia, Xiaohua, 2009. "An optimal control model for load shifting - With application in the energy management of a colliery," Applied Energy, Elsevier, vol. 86(7-8), pages 1266-1273, July.
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    Citations

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    Cited by:

    1. du Plessis, Gideon Edgar & Liebenberg, Leon & Mathews, Edward Henry, 2013. "Case study: The effects of a variable flow energy saving strategy on a deep-mine cooling system," Applied Energy, Elsevier, vol. 102(C), pages 700-709.
    2. Nikodem Szlązak & Dariusz Obracaj & Justyna Swolkień, 2018. "An Evaluation of the Functioning of Cooling Systems in the Polish Coal Mine Industry," Energies, MDPI, vol. 11(9), pages 1-15, August.
    3. Du Plessis, Gideon Edgar & Liebenberg, Leon & Mathews, Edward Henry, 2013. "The use of variable speed drives for cost-effective energy savings in South African mine cooling systems," Applied Energy, Elsevier, vol. 111(C), pages 16-27.
    4. Zhiyong Zhou & Yimeng Cui & Long Tian & Jianhong Chen & Wei Pan & Shan Yang & Pei Hu, 2019. "Study of the Influence of Ventilation Pipeline Setting on Cooling Effects in High-Temperature Mines," Energies, MDPI, vol. 12(21), pages 1-16, October.
    5. Zhuan, Xiangtao & Xia, Xiaohua, 2013. "Optimal operation scheduling of a pumping station with multiple pumps," Applied Energy, Elsevier, vol. 104(C), pages 250-257.
    6. Wang, Yan & Hu, Hejuan & Sun, Xiaoyan & Zhang, Yong & Gong, Dunwei, 2022. "Unified operation optimization model of integrated coal mine energy systems and its solutions based on autonomous intelligence," Applied Energy, Elsevier, vol. 328(C).
    7. Qiaoyun Han & Debo Lin & Xiaojie Yang & Kongqing Li & Wei Yin, 2023. "Thermal Environment Control at Deep Intelligent Coal Mines in China Based on Human Factors," Sustainability, MDPI, vol. 15(4), pages 1-15, February.
    8. Dariusz Obracaj & Nikodem Szlązak & Marek Korzec, 2022. "Using a Mine Dewatering System to Increase Cooling Capacity and Energy Recovery of Underground Refrigeration Plant: A Case Study," Energies, MDPI, vol. 15(24), pages 1-15, December.

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