An experimental investigation on effect of hybrid solid MWCNTs and MgO on thermal conductivity of ethylene glycol

Document Type: Persian

Authors

1 Department of Mechanical Engineering, Najaf Abad Branch, Islamic Azad University, Najaf Abad, Iran.

2 Assistant Professor, Department of Mechanical Engineering, Najaf Abad Branch, Islamic Azad University, Najaf Abad, Iran.

Abstract

In recent decade, the new advanced nanofluids, composed from various particles, have attracted the attention of researchers. This class of nanofluids, which can be prepared by suspending several types (two or more than two) of nanoparticles in base fluid, is termed as hybrid nanofluids. In this work, an experimental investigation on the effects of temperature and concentration of nanoparticles on the thermal conductivity of MgO-MWCNT/EG hybrid nanofluid is presented. The experiments performed at temperatures ranging from 25oC to 50oC and solid volume fraction range of 0 to 0.6%. The measurements revealed that the thermal conductivity of nanofluids enhances up to 23.3% with increase in concentration of nanoparticles and temperature. Moreover, efforts were made to provide an accurate correlation for estimating the thermal conductivity at various temperatures and concentrations. Deviation analysis of the thermal conductivity ratio was performed. The comparison between experimental results and correlations outputs showed a maximum deviation margin of 0.95%, which is an acceptable accuracy for an empirical correlation.

Keywords


  1. Lee G., Kim C. K., Lee M. K., Rhee C. K., Kim S., Kim C., Thermal conductivity enhancement of ZnO nanofluid using a one-step physical method, Thermochimica Acta, 542, 2012, pp. 24–27.
  2. Yiamsawasd T., Selim Dalkilic A., Wongwises S., Measurement of the thermal conductivity of titania and alumina nanofluids, Thermochimica Acta, 545, 2012, pp. 48–56.
  3. Das S. K., Putra N., Thiesen P., RoetzelW., Temperature dependence of thermal conductivity enhancement for nanofluids, Journal of Heat Transfer, 125, 2003, pp. 567–574.
  4. Li C. H., Peterson G. P., The effect of particle size on the effective thermal conductivity of Al2O3-water nanofluids, Journal of Applied Physics, 101, 2007, 044312.
  5. Chandrasekar M., Suresh S., Chandra Bose A., Experimental investigations and theoretical determination of thermal conductivity and viscosity of Al2O3/water nanofluid, Experimental Thermal and Fluid Science, 34 2010, 210–216.
  6.  Sundar L. S., Singh M. K., Sousa A. C. M., Investigation of thermal conductivity and viscosity of Fe3O4nanofluid for heat transfer applications, International Communications in Heat and Mass Transfer, 44, 2013, 7–14.
  7. Jeong J., Li C., Kwon Y., Lee J., Hyung Kim S., Yun R., Particle shape effect on the viscosity and thermal conductivity of ZnO nanofluids, International Journal of Refrigeration, 36, 2013, 2233-2224.
  8. Hemmat Esfe M., Saedodin S., Bahiraei M., Toghraie D., Mahian O., Wongwises S., Thermal conductivity modeling of MgO/EG nanofluids using experimental data and artificial neural network, Journal of Thermal Analysis and Calorimetry, 118 (2014) 287–294.
  9. Hemmat Esfe M., Saedodin S., Asadi A., Karimipour A., Thermal conductivity and viscosity of Mg(OH)2-ethylene glycol nanofluids: Finding a critical temperature, Journal of Thermal Analysis and Calorimetry, 120, 2015, pp. 1145-1149
  10. Hemmat Esfe M., Saedodin S., Naderi A., Alirezaie A., Karimipour A., Wongwises S., Goodarzi M., Dahari M., Modeling of thermal conductivity of ZnO-EG using experimental data and ANN methods, International Communications in Heat and Mass Transfer, 63, 2015, 35–40.
  11. Assael M. J., Chen C. F., Metaxa I., Wakeham W. A., Thermal conductivity of carbon nanotube suspensions in water, International Journal of Thermophysics, 25, 2004, pp. 971–985.
  12.  Hwang Y. J., Ahn Y. C., Shin H. S., Lee C. G., Kim G. T., Park H. S., Lee J. K., Investigation on characteristics of thermal conductivity enhancement of nanofluids, Current Applied Physics, 6, 2006, pp. 1068–1071.
  13. Glory J., Bonetti M., Helezen M., Hermite M. M. L., Reynaud C., Thermal and electrical conductivities of water-based nanofluids prepared with long multiwalled carbon nanotubes, Journal of Applied Physics, 103, 2008, 094309.
  14.  Harish S., Ishikawa K., Einarsson E., Aikawa S., Chiashi S., Shiomi J., Maruyama S., Enhanced thermal conductivity of ethylene glycol with single-walled carbon nanotube inclusions, International Journal of Heat and Mass Transfer, 55, 2012, pp. 3885–3890.
  15. Hemmat Esfe M., Saedodin S., Mahian O., Wongwises S., Thermophysical properties, heat transfer and pressure drop of COOH-functionalized multi walled carbon nanotubes/water nanofluids, International Communications in Heat and Mass Transfer, 58, 2014, pp. 176–183.
  16. Hemmat Esfe M., Saedodin S., Mahian O., Wongwises S., Heat transfer characteristics and pressure drop of COOH-functionalized DWCNTs/water nanofluid in turbulent flow at low concentrations, International Journal of Heat and Mass Transfer, 73, 2014, pp. 186–194.
  17. Baghbanzadeh M., Rashidi A., Rashtchian D., Lotfi R., Amrollahi A., Synthesis of spherical silica/multiwall carbon nanotubes hybrid nanostructures and investigation of thermal conductivity of related nanofluids, Thermochimica Acta, 549, 2012, pp. 87–94.
  18. Munkhbayar B., Tanshen M. R., Jeoun J., Chung H., Jeong H., Surfactant-free dispersion of silver nanoparticles into MWCNT-aqueous nanofluids prepared by one-step technique and their thermal characteristics, Ceramics International, 39, 2013, pp. 6415–6425.
  19. Sundar S. L., Singh M. K., Sousa A. C. M., Enhanced heat transfer and friction factor of MWCNT–Fe3O4/water hybrid nanofluids, International Communications in Heat and Mass Transfer, 52, 2014, pp. 73–83.
  20. Hemmat Esfe M., Wongwises S., Naderi A., Asadi A., Safaei M. R., Rostamian H., Dahari M., Karimipour A., Thermal conductivity of Cu/TiO2–water/EG hybrid nanofluid: Experimental data and modeling using artificial neural network and correlation, International Communications in Heat and Mass Transfer,  66, 2015, pp. 100–104.
    1. Liu M.S., Lin M. C. C., Wang C. C., Enhancements of thermal conductivities with Cu, CuO, and carbon nanotube nanofluids and application of MWNT/water nanofluid on a water chiller system, Nanoscale Research Letters, 6, 2011, p. 297.