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Flow and heat transfer in compact offset strip fin surfaces

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Abstract

Experimental studies of air-side heat transfer and pressure drop characteristics of offset strip fins and flat tube heat exchangers were performed. A series of tests were conducted for 9 heat exchangers with different fin space, fin height, fin strip length and flow length, at a constant tube-side water flow rate of 2.5 m3/h. The characteristics of the heat transfer and pressure drop of different fin space, fin height and fin length were analyzed and compared. The curves of the heat transfer coefficients vs. the pumping power per unit frontal area were then plotted. Moreover, the enhanced heat transfer mechanism of offset strip fins was analyzed using field synergy theory. The results showed that fin length and flow length have more obviously effect on the thermal hydraulic characteristics of offset strip fins.

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Authors and Affiliations

  1. Institute of Refrigeration and Cryogenics Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Junqi Dong, Jiangping Chen & Zhijiu Chen

Authors
  1. Junqi Dong
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  2. Jiangping Chen
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  3. Zhijiu Chen
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Corresponding author

Correspondence to Jiangping Chen.

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Translated from Journal of Shanghai Jiaotong University, 2007, 41(3): 366–369, 375 [译自: 上海交通大学学报]

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Dong, J., Chen, J. & Chen, Z. Flow and heat transfer in compact offset strip fin surfaces. Front. Energy Power Eng. China 2, 291–297 (2008). https://doi.org/10.1007/s11708-008-0061-y

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  • DOI: https://doi.org/10.1007/s11708-008-0061-y

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