Performance evaluation of an air-cooled heat exchange system for hybrid nanofluids

Yi Hsuan Hung, Wei Ping Wang, Yu Chun Hsu, Tun Ping Teng

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

This study used an acetylene flame synthesis system to prepare hybrid carbon nanofluids (HCNFs) containing amorphous carbon, graphene oxide, and graphite-2H as a working fluid for heat exchange applications. In addition, sodium dodecyl sulfate was added to the prepared HCNFs as a dispersant to reinforce their dispersion and suspension performance. The basic characteristics of the HCNFs were measured and analyzed. Finally, the HCNFs were applied in a cooling system with an air-cooled heat exchanger (ACHE) to evaluate the pumping power consumption, heat exchange capacity (Q̇ex), and system efficiency factor (SEF) of the ACHE under turbulent flow. The results show that the pumping power and ̇ex of the ACHE cooling system increased with the HCNF concentration under all experimental conditions. The maximum enhancements in Q̇ex and SEF for the HCNFs at 0.02 wt.% were respectively approximately 13.0% and 11.7% at a flow rate of 2.0 L/min (compared with those of water).

Original languageEnglish
Pages (from-to)43-55
Number of pages13
JournalExperimental Thermal and Fluid Science
Volume81
DOIs
Publication statusPublished - 2017 Feb 1

Keywords

  • Air-cooled heat exchanger (ACHE)
  • Heat exchange capacity
  • Hybrid carbon nanofluid (HCNF)
  • Pumping power consumption
  • System efficiency factor (SEF)

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Nuclear Energy and Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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