Second law of thermodynamic analysis of 40:60% propylene glycol and water mixture based nanodiamond nanofluid under transition flow

L. Syam Sundar, Bobby Mathew, Ahmed Sefelnasr, Mohsen Sherif, Antonio C.M. Sousa

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Second law efficiency (exergy) was studied experimentally for transition flow in a tube of 40:60% (weight) p4ropylene glycol and water mixture based nanodiamond nanofluid. Prior to prepare the stable nano-diamond (ND) nanofluid, its soot was rinsed by strong chemicals. The experiments were carried out for several values of particle loading (0.2% to 1.0%) and of Reynolds number (2000 to 8000). The experimental analysis was also conducted for the heat transfer, friction factor and pumping power characteristics of the ND nanofluid. By increasing the values of particle concentration and Reynolds number, the results indicate an increase of heat transfer, Nusselt number, friction factor, pumping power and thermal performance factor, and a decrease of the thermal entropy generation. In comparison with the base fluid data, the heat transfer coefficient, Nusselt number, pressure drop, pumping power, friction factor and the thermal performance factor of the ND nanofluid augment by 36.83%, 24.16%, 15.38%, 13.18%, 19.9%, and 16.94%, respectively, and the thermal entropy generation decreases by 26.92% for 1.0 vol% and Reynolds number of 5321.16.

Original languageEnglish
Article number108480
JournalDiamond and Related Materials
Volume117
DOIs
Publication statusPublished - Aug 2021

Keywords

  • Exergy efficiency
  • Nanofluids
  • Nusselt number
  • Propylene glycol-water mixture
  • Thermal performance factor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Chemistry(all)
  • Mechanical Engineering
  • Materials Chemistry
  • Electrical and Electronic Engineering

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