EXPERIMENTAL INVESTIGATION ON FLOW CONDENSATION HEAT TRANSFER IN HYDROPHOBIC ANNULAR METAL-FOAM TUBE

机译：疏水性环形金属泡沫管内流动凝结换热的实验研究

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The vapor flow condensation heat transfer in tube filled with hydrophobic annular metal foam is experimentally investigated. The surface of annular metal foam is hydroph-obically modified through chemical corrosion and molecular self-assembly technology. The thickness of the metal foam is 2mm and cell size is 10PPI. The thermocouples are welded in groove to measure wall temperature. The effects of vapor mass flow, cooling water temperature and vapor quality are analyzed. The results show that the pressure drop and average heat transfer coefficient of tubes filled with annular metal foam increase with increasing vapor mass flow or vapor quality. According to wall temperature distribution, it is predicted that flow pattern is annular flow at vapor entrance and the stratified flow is located at the distance from 0.5m to 0.9m. The average heat transfer coefficient of hydrophobic annular metal foam tube increases approximately 1.2 times compared to untreated metal foam tube.

机译：实验研究了填充有疏水性环状金属泡沫的管中的蒸汽流冷凝传热。环形金属泡沫的表面通过化学腐蚀和分子自组装技术进行了疏水改性。金属泡沫的厚度为2mm，泡孔尺寸为10PPI。热电偶焊接在凹槽中以测量壁温。分析了蒸汽质量流量，冷却水温度和蒸汽质量的影响。结果表明，填充有环形金属泡沫的管的压降和平均传热系数随蒸气质量流量或蒸气质量的增加而增加。根据壁面温度分布，可预测出流型在蒸汽入口处为环形流，分层流位于0.5m至0.9m的距离处。与未处理的金属泡沫管相比，疏水性环状金属泡沫管的平均传热系数增加了约1.2倍。

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《ASME international mechanical engineering congress and exposition》|2018年|V008T10A021.1-V008T10A021.8|共8页
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GongHang Zheng; ZhenQian Chen; Juan Shi; XinPeng Huang;
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Metal foam; Hydrophobic surface; Flow condensation heat transfer;

机译：金属泡沫;疏水表面;流冷凝传热;

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1. Experimental study of flow condensation heat transfer in tubes partially filled with hydrophobic annular metal foam [J] . Shi Juan, Zheng Gonghang, Chen Zhenqian, International Journal of Heat and Mass Transfer . 2019,第JUNa期

机译：疏水性环状金属泡沫部分填充管内流态冷凝传热的实验研究
2. Experimental Study on the Modeling of Condensation Heat Transfer Coefficients in High Mass Flux Region of Refrigerant HFC-134a Inside the Vertical Smooth Tube in Annular Flow Regime [J] . AHMET S. DALKILIC, SOMCHAI WONGWISES Heat Transfer Engineering . 2011,第1a2期

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3. Experimental analysis for the determination of the convective heat transfer coefficient by measuring pressure drop directly during annular condensation flow of R134a in a vertical smooth tube [J] . A.S. Dalkilic, I. Teke, S. Wongwises International Journal of Heat and Mass Transfer . 2011,第4期

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4. EXPERIMENTAL INVESTIGATION ON FLOW CONDENSATION HEAT TRANSFER IN HYDROPHOBIC ANNULAR METAL-FOAM TUBE [C] . GongHang Zheng, ZhenQian Chen, Juan Shi, ASME International Mechanical Engineering Congress and Exposition . 2018

机译：疏水性环形金属泡沫管流动凝结热传递的实验研究
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8. An Experimental Investigation of Pressure Drop and Heat Transfer for Water Boiling in a Vertical-Upflow Single-Tube Heat Exchanger [R] . Damman, T. M., Stone, J. R. 1967

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EXPERIMENTAL INVESTIGATION ON FLOW CONDENSATION HEAT TRANSFER IN HYDROPHOBIC ANNULAR METAL-FOAM TUBE

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