Publication de 4 numéros par an
ISSN Imprimer: 2151-7975
ISSN En ligne: 2151-7991
EXPERIMENTAL INVESTIGATION ON THERMAL CHARACTERISTICS OF A TWO-PHASED CLOSED THERMOSYPHON USING ORGANIC NANOFLUIDS
RÉSUMÉ
Today, combining heat pipe and nanoparticle technologies is reported to enhance the efficiency of heat transfer devices. Suspensions of nanoparticles and fluids, called nanofluids, have a great impact in heat transfer enhancement. This paper presents an experimental investigation regarding the effects of organic nanofluids on the efficiency of a two-phase closed thermosyphon. The experimental results showed that, for different input powers, in some cases (ethanol/CuO) the efficiency of the thermosyphon improved compared to the case of using pure base fluid. For instance, acetone/Fe2O3 and ethanol/CuO nanofluids with 0.5-2% weight fraction of nanoparticles as the working fluids present better thermal performance over a wide range of input power. However, the improvements were small and for ethanol/Fe2O3, nanoparticles had the reverse effect. The maximum improvement in efficiency was about 13% in some input powers. In addition, temperature distributions on the thermosyphon confirmed these results too.