Experimental Investigation of Saturated Flow Boiling Heat Transfer to TiO₂/R141b Nanorefrigerant

A comprehensive review on heat transfer characteristics of TiO2 nanofluids

“…Water (a) The maximum CHF enhancement of bare-Ni wire/TiO 2 nanofluid and coated-Ni wire/pure water were 70% and 82.37%, respectively (b) The surface wettability was improved by the boiling of nanofluids and hence brought the CHF enhancement Salari et al [113] Pool Disc copper block Water (a) BHT increased with the concentration of nanoparticles and heat flux (b) Fouling formed by nano-particles can intensify the bubble transport by the intensification of nucleation sites in the boiling surface Tazarv et al [17] Saturated flow…”

Experimental studies of flow boiling heat transfer by using nanofluids

“…For a short time study (0-60 min), they have neglected the deposition of nanoparticles and concluded that the HTC was improved for all nanofluid with smaller nanoparticles diameter, while for extended time study (60-1000 min), they showed that the heat transfer coefficient was deteriorated considerably, for all nanofluids. Tazarv et al [38] utilized a dilute mixture of TiO 2 -R141b as a nanorefrigerant to investigate experimentally the saturated flow boiling heat transfer performance. They are reported that the convective heat transfer coefficient enhancement for the particle concentration in the range of 0.01-0.03 vol% compared to base fluid R141b was more robust for a higher concentration.…”

“…Tazarv et al [38] examined their nanofluids stability after left it about 1 week without movement. Their Fig.…”

Developments and future insights of using nanofluids for heat transfer enhancements in thermal systems: a review of recent literature

“…Nanoparticles can enhance the heat transfer characteristic of the refrigerant, and the bubble size diminishes and moves quickly near the heat transfer surface Jiang et al [98] CNT-R-113 Measured thermal conductivities of four kinds of 1.0 vol. % CNT-R113 nanorefrigerant increase to 82%, 104%, 43% and 50%, respectively Tazarv et al [99] TiO 2 /R-141B Enhancement of convective heat transfer coefficient and higher vapour qualities 'nanorefrigerant' that can enhance refrigeration system performance. Several experimental and numerical investigations [56][57][58][59] have concluded that nanorefrigerants improve thermophysical properties, energy efficiency and the overall system performance.…”