Investigation of the three-phase spiral countercurrent heat exchange and fluid dynamics in an innovative high-temperature particle waste heat recovery system

IF 2.6 3区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Heat and Fluid Flow Pub Date : 2025-03-18 DOI:10.1016/j.ijheatfluidflow.2025.109814

Anxiang Shen , Tao Wang , Huijie Xu , Yutao Shi , Yang Chen , Jianqiu Zhou

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Abstract

A novel steel slag rapid cooling and heat recovery system has been proposed. Gas-liquid–solid coupled heat transfer is adopted to recover waste heat. It only needs very little air velocity and air volume, which greatly reduces the energy consumption. The key component (the spiral coil) has been simulated to study the kinetic energy transfer and heat exchange process. This study examines both the heat transfer characteristics and the fluid dynamics of particles throughout the entire spiral coil. The distribution of particles across the flow path has also been subjected to analysis. Additionally, this study has focused on evaluating the heat transfer efficiency. The performance of the novel system is evaluated with different parameters. It shows that When m_slag is 0.5 kg/s, u_{air_in} is 1 m/s, the system waste heat recovery performance reaches the maximum (Q_water = 16.33 kW, Q_air = 1.08 kW, Q_blower = −0.82 kW). The present work provides a theoretical basis for further improving the steel slag waste heat recovery efficiency.

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新型高温颗粒余热回收系统中三相螺旋逆流换热及流体动力学研究

提出了一种新型的钢渣快速冷却热回收系统。采用气液固耦合传热回收余热。它只需要很小的风速和风量，大大降低了能耗。对关键部件（螺旋盘管）进行了模拟，研究了其动能传递和换热过程。本研究考察了整个螺旋盘管内颗粒的传热特性和流体动力学。颗粒在流道上的分布也进行了分析。此外，本研究还着重对传热效率进行了评估。用不同的参数对系统的性能进行了评价。结果表明：当mslag = 0.5 kg/s, uair_in = 1m /s时，系统余热回收性能达到最大值（Qwater = 16.33 kW, Qair = 1.08 kW, Qblower = - 0.82 kW）。本工作为进一步提高钢渣余热回收效率提供了理论依据。

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来源期刊

International Journal of Heat and Fluid Flow 工程技术-工程：机械

CiteScore

5.00

自引率

7.70%

发文量

131

审稿时长

33 days

期刊介绍： The International Journal of Heat and Fluid Flow welcomes high-quality original contributions on experimental, computational, and physical aspects of convective heat transfer and fluid dynamics relevant to engineering or the environment, including multiphase and microscale flows. Papers reporting the application of these disciplines to design and development, with emphasis on new technological fields, are also welcomed. Some of these new fields include microscale electronic and mechanical systems; medical and biological systems; and thermal and flow control in both the internal and external environment.