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The metal recycling industry is among the largest contributors to greenhouse gases, mostly relying on fossil fuels for power production. Utilising energy-intensive smelters, where power conversion from electricity to heat occurs, these sectors find it difficult to adapt to efficient systems or implement renewable energy as a power source. This presents an opportunity to integrate concentrated solar power into this industry. In the case of aluminium recycling, energy requirements are significantly lower compared to primary production and this presents an opportunity to explore and integrate renewables in the recycling industry. The University of Pretoria’s Solar Thermal Spoke developed a solar dish producing heat and electricity through a hybrid approach. This article reports on a two-stage pipe-in-pipe heat exchanger experimentally tested with a gas-fired combustion chamber. The results in this paper highlight the initial findings of the tested heat exchanger.

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Initial Testing of a Heat Exchanger for Aluminium Recycling and Water Heating from the Exhaust of a Solar-Dish Brayton Cycle

  • 会议论文

  • 发表日期：

    2026年

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  • Tlou S. Mokobodi,
  • Caitlin C. Cockcroft,
  • Jonathan K. Swanepoel,
  • Zwivhuya L. Muofhe,
  • Evan D. Humphries,
  • Duncan S. McGee,
  • Henno de Beer,
  • Dirk van Vuuren,
  • Willem G. Le Roux

摘要

The metal recycling industry is among the largest contributors to greenhouse gases, mostly relying on fossil fuels for power production. Utilising energy-intensive smelters, where power conversion from electricity to heat occurs, these sectors find it difficult to adapt to efficient systems or implement renewable energy as a power source. This presents an opportunity to integrate concentrated solar power into this industry. In the case of aluminium recycling, energy requirements are significantly lower compared to primary production and this presents an opportunity to explore and integrate renewables in the recycling industry. The University of Pretoria’s Solar Thermal Spoke developed a solar dish producing heat and electricity through a hybrid approach. This article reports on a two-stage pipe-in-pipe heat exchanger experimentally tested with a gas-fired combustion chamber. The results in this paper highlight the initial findings of the tested heat exchanger.