Quenching Experiment on Vertical Surface using Carbon Nanotube (CNT) Nano-fluids

ABSTRACT
Quenching experiment on vertical surface using Carbon Nanotube (CNT) nanofluids were conducted to see the effect of using CNT nanofluids on the quenching speed. Homogeneous and stable CNT nanofluids have been produced by suspending well dispersible CNT nano-particle into water base fluid. CNT nanofluids (0.0001 vol.% and 0.01 vol.%) were prepared for experiments. From zeta potential results our CNT nano-fluids has a good stability. The test section was an annular channel with a concentric inner rod made of stainless steel SUS316 and an outer tube made of quartz glass. The experimental data obtained show that quenching speed using CNT nanofluids enhanced compare to water.

Keywords: film boiling; Nanofluids; CNT nanofluids , quenching

Characteristics of Pool Boiling Heat Transfer of Stabilized Colloidal Single walled Carbon Nano Tube (SW-CNT) and Multi walled Carbon Nano Tube (MW-CNT

ABSTRACT
Heat transfer and Critical heat flux (CHF) in pool boiling of single-walled and multi-walled CNT nanofluids were investigated using horizontal surface. Homogeneous and stable nanofluids have been produced by suspending well dispersible single-walled carbon nanotubes (S-CNTs) and multi-walled carbon nanotubes (M-CNTs) into water base fluid. S-CNTs nanofluids (0.0001, 0.001, and 0.01 vol.%) and M-CNTs nanofluids (0.0001, 0.001 vol.%) were prepared for experiments. From zeta potential results our CNTs nano-fluids has a good stability, it was constant for more than one month. The experimental data obtained show that there were a significant enhancement of CHF using nano-fluids compare to water. Our findings indicate that have collective influence on the CHF enhancement of CNT nanofluids.

Keywords: CHF; Nanofluids; Single-walled CNT; Multi-walled CNT; Pool boiling; CHF enhancement; SEM; AFM; contact angle; zeta potential

Reflooding Experiment on Vertical Surface using Al2O3 Nano-fluids

ABSTRACT
Reflooding experiment on vertical surface using Al203 nanofluids were conducted to see the effect of using Al203 nanofluids on the quenching speed. Homogeneous and stable nanofluids have been produced by suspending well dispersible Al203 nano-particle into water base fluid. Al203 nanofluids (0.0001 vol.% and 0.01 vol.%) were prepared for experiments. From zeta potential results our Al203 nano-fluids has a good stability. The test section was an annular channel with a concentric inner rod made of stainless steel SUS316 and an outer tube made of quartz glass. The experimental data obtained show that quenching speed using nanofluids enhanced compare to water.

Keywords: film boiling; Nanofluids; Al203 nanofluids , reflooding, quenching