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首页> 外文期刊>International journal of green energy >EXPERIMENTAL INVESTIGATIONS OF POOL BOILING HEAT TRANSFER ON HORIZONTAL PLATE SINTERED WITH METALLIC FIBER FELT
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EXPERIMENTAL INVESTIGATIONS OF POOL BOILING HEAT TRANSFER ON HORIZONTAL PLATE SINTERED WITH METALLIC FIBER FELT

机译：金属纤维毡烧结水平板上池沸腾传热的实验研究

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摘要

In this study, pool boiling heat transfer performance of de-ionized water on horizontal plates sintered with copper fiber of various geometries was experimentally investigated under atmospheric pressure. Copper fiber felt with different structural parameters was proposed to provide artificial nucleate sites to improve heat transfer performance. A high-speed camera was used to photograph bubble growth processes. Pool boiling curves were obtained. Effects of fiber felt porosity and fiber diameter on the onset of nucleate boiling (ONB) and boiling heat transfer coefficient were investigated. It was revealed that copper fiber felt surfaces can reduce wall superheat at boiling incipience and exhibit significant enhancement of heat transfer compared with smooth surface. The influence of porosity on heat transfer performance for metal fiber felts was more sensitive than fiber diameter. A bubble with an average diameter of less than 0.3 mm was defined as a small-sized bubble (SSB)from visualization photograph by high-speed camera, and pool boiling heat transfer performance was highly dependent on the percentage of small-sized bubbles (PSSB) to help illustrate enhancement mechanisms between bubble size distribution and boiling heat transfer performance. Smaller mean pore diameter can be achieved through decreasing either porosity or fiber diameter, as it allowed the fiber felt to create stronger capillary force to form bigger size bubble and lower PSSB to result in improved heat transfer coefficient.
机译：在这项研究中，在大气压力下，实验研究了去离子水在用各种几何形状的铜纤维烧结的水平板上的池沸腾传热性能。提出了具有不同结构参数的铜纤维毡，以提供人工成核位置，以改善传热性能。使用高速相机拍摄气泡生长过程。获得池沸腾曲线。研究了纤维毡孔隙率和纤维直径对成核沸腾（ONB）的开始和沸腾传热系数的影响。结果表明，与光滑表面相比，铜纤维毡表面可以减少沸腾初期的壁过热，并显着增强传热。孔隙率对金属纤维毡的传热性能的影响比纤维直径更敏感。通过高速相机的可视化照片将平均直径小于0.3毫米的气泡定义为小气泡（SSB），并且池沸腾传热性能高度依赖于小气泡（PSSB）的百分比）以帮助说明气泡尺寸分布和沸腾传热性能之间的增强机制。通过降低孔隙率或纤维直径，可以实现较小的平均孔径，因为它可以使纤维毡产生更强的毛细作用力，从而形成更大尺寸的气泡并降低PSSB，从而提高传热系数。

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  • 来源
    《International journal of green energy》 |2012年第4期|p.22-38|共17页
  • 作者

    Z. G. Qu; D. G. Li; J. Y. Huang; Z. G. Xu; X. L. Liu; W. Q. Tao;

  • 作者单位

    MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China;

    MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, China;

    MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, China;

    MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, China;

    MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, China;

    MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    pool boiling; metallic fiber felt; ONB; heat transfer enhancement; bubble growth;

    机译：池沸腾;金属纤维毡;ONB;传热增强;泡沫增长;

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