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ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

International Heat Transfer Conference 13
August, 13-18, 2006, Sydney, Australia

MASS TRANSFER ENHANCEMENT OF A BINARY NANOFLUID FOR ABSORPTION APPLICATION

Get access (open in a dialog) DOI: 10.1615/IHTC13.p8.170
10 pages

Sinopsis

The objectives of this paper are to estimate the absorption performance of an ammonia/water binary nanofluid in the bubble absorption and to increase the heat and mass transfer performance of the binary nanofluid by adding chemical surfactants. Cu, CuO, and Al2O3 are applied to produce the binary nanofluid and 2-ethyl-1-hexanol (2E1H), n-octanol, and 2-octanol are used as the chemical surfactants. The concentration of ammonia in the basefluid, that of nano-particles in the nanofluid, and that of surfactants in the nanofluid are considered as the key parameters of which experimental ranges are 0 ∼ 18.7% (ammonia concentration), 0∼0.1% (nano-particles concentration), and 0 ∼ 1000 ppm (surfactant concentration). The results show that the binary nanofluids can increase the absorption rate up to 3.2 times with 0.1% of Cu particles and the addition of surfactants into the binary nanofluid can enhance the absorption rate up to 5.3 times. It can be concluded that the application of binary nanofluid and the addition of chemical surfactants enhance the absorption performance significantly in the ammonia bubble absorption. Especially, under the considered conditions, 2E1H of 700 ppm and Cu nano-particles of 0.1% are the optimal conditions, and the effects of surfactants and binary nanofluids become stronger with increasing the concentration of NH3 in the basefluid.