Performance assessment of an air-cooled heat exchanger for multiwalled carbon nanotubes-water nanofluids

Tun Ping Teng*, Yu Chun Hsu, Wei Ping Wang, Yan Bo Fang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


This study used a two-step synthesis method to prepare multiwalled carbon nanotubes (MWCNTs)-water nanofluids (MWNFs) with a dispersant of sodium dodecylbenzenesulfonate (SDBS) and an evacuation procedure. The basic characteristics of the MWNFs were measured and analyzed. Then, the MWNFs were used in a cooling system with an air-cooled heat exchanger (ACHE) to evaluate the heat exchange capacity, pumping power, and efficiency factor (EF) of the ACHE. The results show that the pumping power of the cooling system increased with an increase in the MWNFs concentration under all experimental conditions; the maximum enhancements of MWNFs at 0.25 wt.% for the heat exchange capacity and EF were approximately 7.77% and 7.53%, respectively, compared with water. However, increasing the concentration of the MWNFs did not increase the heat exchange capacity and EF. The optimal configuration of the MWNF concentration was 0.25 wt.%.

Original languageEnglish
Pages (from-to)346-355
Number of pages10
JournalApplied Thermal Engineering
Publication statusPublished - 2015 Jul 4


  • Air-cooled heat exchanger (ACHE)
  • Efficiency factor (EF)
  • Multiwalled carbon nanotubes (MWCNTs)
  • Nanofluids
  • Shear-thinning behavior

ASJC Scopus subject areas

  • Mechanical Engineering
  • Energy Engineering and Power Technology
  • Fluid Flow and Transfer Processes
  • Industrial and Manufacturing Engineering


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