(109g) Enhancement of Thermal Transport in Water and Ethylene Glycol Using Al2o3 Nanoparticles

Authors: 
Ascic, M., Construction Engineering Research Laboratory (CERL)
Hays, A., Construction Engineering Research Laboratory (CERL)
Marsh, C. P., U.S. Army Engineer Research and Development Center
Kessler, D., Construction Engineering Research Laboratory (CERL)
Crowley, E., Construction Engineering Research Laboratory (CERL)
Jones, B. G., University of Illinois
Alvarado, J., Texas A&M University
Tangtragulwon, P., Texas A&M University


Current research demonstrates a significant increase in the thermal conductivity of suspensions containing small volume fractions (<5%) of metal or metal oxide nanoparticles compared with the base liquids alone. Due to incomplete discussion of sample preparation and characterization in a significant portion of literature to date, there is some ambiguity in what the published data actually represents. This paper provides thermal conductivity measurements for two types of nanofluids, Al203-deionized water and Al203-ethylene glycol, with a well described sample preparation method. The nanofluids were loaded at 2% by volume with 44 nm Al203 nanoparticles. Thermal conductivity values were measured using the transient hot wire (THW) method, the nanoparticle size was obtained by small angle X-ray scattering (SAXS), and the morphology was determined by transmission electron microscopy (TEM).

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