한국태양에너지학회 논문집 (Journal of the Korean Solar Energy Society)

  • 제32권6호
  • /
  • Pages.85-92
  • /
  • 2012
  • /
  • 1598-6411(pISSN)
  • /
  • 2508-3562(eISSN)
한국태양에너지학회 (The Korean Solar Energy Society)
권호 표지
DOI QR코드

DOI QR Code

물-에탄올 기반 이성분 산화탄소나노유체의 특성 비교 연구

A Comparative Study on the Characteristics of Binary Oxidized Carbon Nanofluids Based DI Water and Ethanol

  • Park, Sung-Seek (Dept. of Nuclear & Energy Engineering, Jeju National University) ;
  • Kim, Nam-Jin (Dept. of Nuclear & Energy Engineering, Jeju National University)
  • 투고 : 2012.11.06
  • 심사 : 2012.12.26
  • 발행 : 2012.12.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

A nanofluid is a fluid containing suspended solid particles, with sizes on the order of nanometers. Normally, nanofluids have higher thermal conductivitiest han their base fluids. Therefore, we measured the thermal conductivity and viscosity of oxidized carbon nanofluids based the mixture of distilled water and ethanol (ethanol concentration is 0.2) oxidized carbon nanofluids were made by ultrasonic dispersing oxidized multi-walled carbon nanotubes in the mixture of distilled water and ethanol at the rates of 0.001~ 0.1 vol%. The thermal conductivity and viscosity of oxidized carbon nanofluids were measured by using transient hot-wire method and rotational digital viscometer, respectively. And all of experiments were carried out at the same temperature conditions($10^{\circ}C$, $25^{\circ}C$ and $70^{\circ}C$). As a result, when volume fraction of nanofluids is 0.1 vol%, thermal conductivity was improved 13.6% ($10^{\circ}C$), 15.1% ($25^{\circ}C$), and 17.0% ($70^{\circ}C$), and its viscosity was increased by 36.0% ($10^{\circ}C$), 32.9% ($25^{\circ}C$) and 19.5% ($70^{\circ}C$) than the base fluids.

키워드

참고문헌

  1. International Energy Agency, Key World Energy STATISTICS, 2010
  2. Afgam, N.,New Developments in Heat Exchanger, Gordonand Breach Publishers, pp.1-696, 1996
  3. Das. S.K.,Choi. S.U.S., Yu. W., Nanofluids Science and Technology, John Wiley & Sons,Inc., 2008
  4. Do. K.H.and Jang. S.P., Effect of nanofluids on the thermal performance of a flat micro heat pipe with a rectangular grooved wick, In. J. of Heatand Mass Transfer, Vol.53, pp.2183-2192, 2010 https://doi.org/10.1016/j.ijheatmasstransfer.2009.12.020
  5. M. Rafati, A.A. Hamidi, M. Shariati Niaser, Application of nanofluids in computer coolingsystems(heat transfer performance of nanofluids), Applied Thermal Engineering, Vol.45-46,pp.9-14, 2012. https://doi.org/10.1016/j.applthermaleng.2012.03.028
  6. Lin Lu, Lun-Chun Lv, Zhen-Hua Liu, Application of Cu-water and Cu-ethanol nanofluids in a small flat capillary pumped loop, Thermochimica Acta, Vol.512, No. 102, pp.95-104, 2012.
  7. Kim N. J., Park S. S., Lim S. H., Chun W. G., A study on the characteristics of Carbon nanofluids at the room temperature ($25^{\circ}C$), Int. Com. in Heat and Mass Transfer, Vol.38 No.3, pp.313-318, 2011. https://doi.org/10.1016/j.icheatmasstransfer.2010.11.002
  8. Park. C.K., A Study of the heat transfer characteristics of Rotating heat pipe with water-ethanol mixture as working fluid, Solar Energy, Vol.11, No.1, pp.78-86, 1991.
  9. An E. J., Park S. S., Park Y. C., Kim J. Y. and Kim N. J., Study on the thermal conductivity and viscosity of ethanol with carbon nanotubes for the development of a heat pipe waorking fluid, J. of the Korean SolarEnergy Society, Vol.32, No.4, pp.9-16, 2012
  10. Bently, J. P., Temperature sensor characteristics and measurement system design, Journal of Physics E: Scientific Instruments, Vol.17, pp.430-435, 1984 https://doi.org/10.1088/0022-3735/17/6/002
  11. Nagasaka, Y. and Nagashima, A., Absolute Measurement of the thermal conductivity ofelectrically conducting liquids by the transient hot-wire method, Journal of Physics E: Scientific Instruments, Vol. 14, pp.1435-1440, 1981 https://doi.org/10.1088/0022-3735/14/12/020
  12. D.R.Lide, Ed., CRC Handbook of Chemistry and Physics, CRC Press, 89th ed., 2008.
  13. Chemical Engineering Research Information Center, http://www.cheric.org/research/kdb/hcprop/showcef.php?cmpid=818&prop =THL