Investigation on spray cooling heat transfer performance with different nanoparticles and surfactants

Jun Bao, Yu Wang*, Risto Kosonen, Xinjie Xu, Jinxiang Liu

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

The spray cooling enhancement method has consistently been the focus area for research as a highly effective cooling method that can alter the properties of spray media by allowing the addition of different types of additives. In this study, an open spray cooling system was established for experimental purposes. Firstly, the effects of nozzles on the spray cooling characteristics were investigated through four kinds of nozzle experiments. Al2O3-H2O, TiO2-H2O, ZrO2-H2O, and SiO2-H2O nanofluids were chosen as cooling substances based on the optimal nozzles, and the effects of the type and concentration of nanoparticles on cooling performance were studied. Based on the performance of the nanoparticles, sodium dodecyl benzenesulfonate(SDBS) was selected as the surfactant for Al2O3 and TiO2 nanoparticles, while cetyltrimethyl ammonium bromide(CTAB) was selected as the surfactant for ZrO2 and SiO2 nanoparticles. The effects of surfactants with different concentrations on the heat transfer performance of nanofluids were studied. The results showed that when the mass fraction of SiO2 nanoparticles was 0.2% and CTAB was 0.005%, an optimal cooling effect was achieved; which was 5.9% higher than that of water and 1.7% higher than that obtained without CTAB.

Original languageEnglish
Number of pages15
JournalHeat and Mass Transfer/Waerme- und Stoffuebertragung
Early online date2 Nov 2021
DOIs
Publication statusE-pub ahead of print - 2 Nov 2021
MoE publication typeA1 Journal article-refereed

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