Abstract
The objectives of this paper are to visualize the bubble behavior during the NH3/H2O absorption process with chemical surfactant and nano-particles and to study the effect of nano-particles and surfactants on the absorption characteristics. Binary nanofluid which means binary mixture with nano-sized particles is tested to apply nanofluid to the absorption system. Cu, CuO and Al2O3 nano-particles are added into NH3/H2O solution to make the binary nanofluids, and 2-ethyl-1-hexanol, n-octanol and 2-octanol are used as the 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. The results show that the addition of surfactants and nano-particles improves the absorption performance up to 5.32 times. It can be concluded that the addition of both surfactants and nano-particles enhances significantly the absorption performance during the ammonia bubble absorption process.
Original language | English |
---|---|
Pages (from-to) | 50-57 |
Number of pages | 8 |
Journal | International Journal of Refrigeration |
Volume | 30 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2007 Jan |
Externally published | Yes |
Keywords
- Absorption system
- Additives
- Ammonia-water
- Improvement
- Nanofluid
- Particle
- Performance
- Refrigeration
- Surface tension
ASJC Scopus subject areas
- Building and Construction
- Mechanical Engineering