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Experimental study on heat transfer and pressure drop of micro-sized tube heat exchanger

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Abstract

A micro-sized tube heat exchanger (MTHE) was fabricated, and its performance in heat transfer and pressure drop was experimentally studied. The single-phase forced convection heat transfer correlation on the sides of the MTHE tubes was proposed and compared with previous experimental data in the Reynolds number range of 500–1 800. The average deviation of the correlation in calculating the Nusselt number was about 6.59%. The entrance effect in the thermal entrance region was discussed. In the same range of Reynolds number, the pressure drop and friction coefficient were found to be considerably higher than those predicted by the conventional correlations. The product of friction factor and Reynolds number was also a constant, but much higher than the conventional.

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Authors and Affiliations

  1. Key Laboratory of Efficient Utilization of Low and Medium Grade Energy of Ministry of Education, Tianjin University, Tianjin, 300072, China

    Qiuxiang Wang  (王秋香) & Chuanshan Dai  (戴传山)

Authors
  1. Qiuxiang Wang  (王秋香)
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  2. Chuanshan Dai  (戴传山)
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Corresponding author

Correspondence to Chuanshan Dai  (戴传山).

Additional information

Supported by National Basic Research Program of China (“973” Program, No. 2011CB707203).

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Wang, Q., Dai, C. Experimental study on heat transfer and pressure drop of micro-sized tube heat exchanger. Trans. Tianjin Univ. 20, 21–26 (2014). https://doi.org/10.1007/s12209-014-2138-5

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  • DOI: https://doi.org/10.1007/s12209-014-2138-5

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