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Title: Visualisation and Heat Transfer Performance of Mini-Channel Flat Heat Pipe with a Binary Mixture
题目：二元混合物微通道平板热管的可视化和传热性能
Authors: FAN Gaoting, TANG Aikun, CAI Tao, SHAN Chunxian, PAN Jun, JIN Yi
作者：樊高挺，唐爱坤，蔡涛，单春贤，潘军，金翼
单位：江苏大学能源与动力工程学院,江苏金合能源科技有限公司
Journal of Thermal Science, 2024, 33(5): 1712-1725.
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Visualisation and Heat Transfer Performance of Mini-Channel Flat Heat Pipe with a Binary Mixture.pdf
摘要
Abstract: To unravel the intricacies of two-phase gas-liquid flow characteristics and heat transfer behavior, an array mini-channel gravity plate heat pipe (AMGPHP) is proposed in this work, which allows for observing the internal changes in the state of the working fluids. The flow patterns such as pool flow, columnar flow, and slug flow, are experimentally explored and analyzed in detail. It is found that the optimal volume fill ratio is 20% by utilizing start-up time and thermal resistance as performance evaluation metrics. With this fill ratio, a medium optimization strategy by blending ethanol within R141b is proposed and evaluated. In comparison to pure working fluids, the heat transfer performance of AMGFHP in the binary fluid has been significantly augmented due to temperature and concentration shifts resulting from disparate boiling points. Under the 10% volume fraction ethanol blending condition, the equivalent thermal conductivity of the heat pipe is dramatically elevated, with a value of 3110 W/(m·°C), along with the reduction of the minimum start-up power to 4 W. In general, applying such a medium to heat pipes has considerable potential in practical applications.
摘要：本文提出了一种可以观察工作流体内部状态变化的阵列式微通道重力平板热管（AMGPHP），实验探索并详细分析了池状流、塞状流和弹状流等模式，深入揭示了其内部的复杂气液两相流特性和传热行为。以启动时间和热阻为性能评估指标，确定了装置的最佳体积充液率应为20%。在此基础上，设计并评估了在 R141b 中掺混乙醇的介质优化策略。与单一工质相比，由于沸点差异导致的温度和浓度滑移，AMGFHP 使用二元混合流体时的传热性能将显著提升。在 10%体积 的乙醇掺混条件下，该热管的等效热导率可达到 3110 W/(m·℃)，最低启动功率也低至 4 W，体现出其在实际应用中的良好潜质。
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引用格式
FAN Gaoting, TANG Aikun, CAI Tao, SHAN Chunxian, PAN Jun, JIN Yi, Visualisation and Heat Transfer Performance of Mini-Channel Flat Heat Pipe with a Binary Mixture, Journal of Thermal Science, 2024, 33(5): 1712-1725.
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