Local heat transfer measurements of plate finned-tube heat exchangers by infrared thermography

Herchang Ay, Jiin-Yuh Jang, Jer Nan Yeh

研究成果: Article

98 引文 斯高帕斯(Scopus)

摘要

An experimental study is performed using an infrared thermovision to monitor temperature distribution over a plate-fin surface inside the plate finned-tube heat exchangers. The differentiation of the temperature function is derived to determine the local convective heat transfer coefficients on the tested fin, using a local element lumped conduction equation included the convective effect on the boundaries with experimental data. It is disclosed that the infrared thermography is capable of rapidly detecting location and extent of transition and separation regions of the boundary layer over the whole surface of the tested models. Through the comparison of the test results on the strategy region of the in-line and staggered arrangements, it is more easy to understand or interpret the detailed dynamic phenomena of flow existed in the heat exchangers. In addition, the experimental results demonstrate that the averaged heat transfer coefficient of staggered configuration is 14 32% higher than that of in-lined configuration

原文English
頁(從 - 到)4069-4078
頁數10
期刊International Journal of Heat and Mass Transfer
45
發行號20
DOIs
出版狀態Published - 2002 九月 1

    指紋

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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