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Case study: The effects of a variable flow energy saving strategy on a deep-mine cooling system

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  • du Plessis, Gideon Edgar
  • Liebenberg, Leon
  • Mathews, Edward Henry

Abstract

Cooling systems consume up to 25% of the total electricity used on deep level mines. These systems are integrated with the water reticulation system to provide chilled service water to the mine as well as cooling for mine ventilation air. Although there is definite potential for demand-side management on these systems, it is critical that the service delivery be maintained so as not to adversely affect productivity. An energy saving strategy based on variable water flow was developed for the unique demands of integrated mine cooling systems. The strategy is based on matching the evaporators with the demand of chilled water; condensers adapting to the heat load; and the bulk air cooler matching the demand of ventilation air requirements. In this paper, a case study is presented in which the savings and consequences of implementing the developed energy saving strategy are investigated. It is shown that a decrease of 31.5% in overall electrical energy usage is possible without affecting the service delivery or performance of the cooling system.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:appene:v:102:y:2013:i:c:p:700-709
    DOI: 10.1016/j.apenergy.2012.08.024
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    References listed on IDEAS

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    1. 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.
    2. Lee, W. L. & Yik, F. W. H., 2002. "Framework for formulating a performance-based incentive-rebate scale for the demand-side-energy management scheme for commercial buildings in Hong Kong," Applied Energy, Elsevier, vol. 73(2), pages 139-166, October.
    3. Abdelaziz, E.A. & Saidur, R. & Mekhilef, S., 2011. "A review on energy saving strategies in industrial sector," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(1), pages 150-168, January.
    4. Kelly Kissock, J. & Eger, Carl, 2008. "Measuring industrial energy savings," Applied Energy, Elsevier, vol. 85(5), pages 347-361, May.
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    Cited by:

    1. Wang, Mei & Liu, Peng & Liu, Lang & Geng, Mingli & Wang, Yu & Zhang, Zhefeng, 2022. "The impact of the backfill direction on the backfill cooling performance using phase change materials in mine cooling," Renewable Energy, Elsevier, vol. 201(P1), pages 1026-1037.
    2. Wang, Zhiyuan & Qian, Zhongdong & Lu, Jie & Wu, Pengfei, 2019. "Effects of flow rate and rotational speed on pressure fluctuations in a double-suction centrifugal pump," Energy, Elsevier, vol. 170(C), pages 212-227.
    3. Xian Li & Houli Fu, 2020. "Development of an Efficient Cooling Strategy in the Heading Face of Underground Mines," Energies, MDPI, vol. 13(5), pages 1-11, March.
    4. 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.
    5. Arun Shankar, Vishnu Kalaiselvan & Umashankar, Subramaniam & Paramasivam, Shanmugam & Hanigovszki, Norbert, 2016. "A comprehensive review on energy efficiency enhancement initiatives in centrifugal pumping system," Applied Energy, Elsevier, vol. 181(C), pages 495-513.

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