Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Experimental Investigation on the Thermal Performance Enhancement of Cooling System for Vehicles using Water/Coolant-Based Al2O3 Nanofluids

물/부동액-기반Al2O3나노유체를 이용한 차량용 냉각시스템 성능 향상에 관한 실험적 연구

  • 박용준 (국방기술품질원) ;
  • 김현진 (한국항공대학교 항공우주 및 기계공학부) ;
  • 이승현 (한국항공대학교 항공우주 및 기계공학부) ;
  • 최태종 (한국항공대학교 항공우주 및 기계공학부) ;
  • 강예준 (한국항공대학교 항공우주 및 기계공학부) ;
  • 장석필 (한국항공대학교)
  • Received : 2015.03.06
  • Accepted : 2015.03.17
  • Published : 2015.06.30
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Abstract

In this study, the thermal performance of vehicle's cooling system is experimentally investigated using the water/coolant-based $Al_2O_3$ nanofluids as working fluids. For the purpose, the water/coolant-based $Al_2O_3$ nanofluids are prepared by twostep method with gum arabic. In order to obtain the well-suspended nanofluids, the agglomerated $Al_2O_3$ nanoparticles are precipitated using centrifugal force and the experiments are performed with supernatant of them. The thermal conductivity is measured by transient hot wire method and the thermal conductivity of nanofluids is enhanced up to 4.8% as compared to that of base fluids. Moreover, the cooling performance of water/coolant-based $Al_2O_3$ nanofluids is evaluated using vehicle's engine simulator under the constant RPM condition. The results show that the cooling performance of automobile engine increases up to 5.9% using prepared nanofluids. To investigate the effect of nanofluids on exhaust gas, the $NO_x$ emission is measured during the operation with respect to time and 10.3% of $NO_x$ emission is decreased. The experimental results imply that the water/coolant-based $Al_2O_3$ nanofluids might be used as a next-generation vehicles' coolant

Keywords

References

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