Investigating Applications of Heat Recovery Systems in Aluminum Smelters in the UAE

  • Maryam S. Altamimi

    Student thesis: Master's Thesis

    Abstract

    Around 80% of the world total energy consumption is mainly derived from fossil fuels including coal, oil and gas. The great dependency on these non-renewable resources contributes to the generation of greenhouse gases (GHGs) which derive the climate change. Since the development of renewable energies, the global renewable power capacity has reached 1,179 gigawatts according to IRENA and 75% reduction of GHGs could be achieved through using these sources. The United Arab Emirates is one of the largest energy consumers per capita, and about 20% of the country's total energy production is consumed by the aluminum industry [1]. Around half of the energy input in the aluminum industry is lost as heat. The adoption of renewable energy sources and recovery of waste heat in aluminum industry would result in decreasing the overall cost, reducing greenhouse gas emissions and increasing the overall efficiency of the process. This research presents the opportunity to recover some part of the energy lost in aluminum industry along with a review and evaluation of potential waste heat-to-power conversion systems. The most appropriate system is selected based on the efficiency and the characteristics of the waste heat from the sidewalls of aluminum smelter, and the potential of heat to electricity recovered is estimated. The resulting energy efficiency improvement is estimated to reach 5.2% and the system payback period is around 12 years.
    Date of AwardMay 2020
    Original languageAmerican English

    Keywords

    • Waste heat
    • engine
    • heat recovery
    • Aluminum smelter
    • energy efficiency.

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