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<p>As a next-generation design tailored for high-calorific waste, the water-cooled grate for waste incinerators offers superior heat dissipation and operational adaptability. To further enhance cooling efficiency while reducing pressure drop, this study proposes a multi-objective topology optimization approach for designing the heat dissipation structure of water-cooled incineration grates. The method first establishes an optimization function targeting maximized heat transfer and minimized fluid flow power dissipation. Subsequently, the sequential quadratic optimization (SNOPT) algorithm is used to get two-dimensional (2D) optimal channels. And then the optimized result is extended to a three-dimensional (3D) structure. Finally, finite element simulations compare the thermal performance of four internal flow channel designs (wavy, spiral, M-shaped, and topology-optimized) under varying coolant flow rates. Results demonstrate that the topology-optimized water-cooled grate exhibits outstanding heat dissipation capacity and thermal stability under various operational conditions. Specifically, it can reduce the maximum grate temperature by 20 K while decreasing the temperature uniformity coefficient by up to 23.41%, effectively validating the superior performance of this topological heat dissipation structure. Overall, this study provides critical design principles and solutions for water-cooled incineration grates in high temperature environments, advancing the development of efficient waste-to-energy systems.</p>

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Design of water-cooled incineration grate heat dissipation structure based on multi-objective topology optimization

  • 期刊论文

  • 发表日期：

    2025年9月11日

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  • Tao Jiang,
  • Xingxin Ding,
  • Haiyang Liu,
  • Zhi Zhang

摘要

As a next-generation design tailored for high-calorific waste, the water-cooled grate for waste incinerators offers superior heat dissipation and operational adaptability. To further enhance cooling efficiency while reducing pressure drop, this study proposes a multi-objective topology optimization approach for designing the heat dissipation structure of water-cooled incineration grates. The method first establishes an optimization function targeting maximized heat transfer and minimized fluid flow power dissipation. Subsequently, the sequential quadratic optimization (SNOPT) algorithm is used to get two-dimensional (2D) optimal channels. And then the optimized result is extended to a three-dimensional (3D) structure. Finally, finite element simulations compare the thermal performance of four internal flow channel designs (wavy, spiral, M-shaped, and topology-optimized) under varying coolant flow rates. Results demonstrate that the topology-optimized water-cooled grate exhibits outstanding heat dissipation capacity and thermal stability under various operational conditions. Specifically, it can reduce the maximum grate temperature by 20 K while decreasing the temperature uniformity coefficient by up to 23.41%, effectively validating the superior performance of this topological heat dissipation structure. Overall, this study provides critical design principles and solutions for water-cooled incineration grates in high temperature environments, advancing the development of efficient waste-to-energy systems.