Pool boiling performance of HFE-7100 on hierarchically structured surfaces
The evolution of the processes for modifying/manufacturing surfaces has facilitated the advancement in pool boiling research with surfaces capable of increasing the heat transfer coefficient (HTC) and the critical heat flux (CHF) through micro/nanostructures heating surfaces. The hybrid processes, w...
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doaj-2be6a476a24d43eebbe107966ffbc2e42021-10-09T04:38:36ZengElsevierCase Studies in Thermal Engineering2214-157X2021-12-0128101536Pool boiling performance of HFE-7100 on hierarchically structured surfacesErivelto dos Santos Filho0Igor Seicho Kiyomura1Bruno Alves de Andrade2Elaine Maria Cardoso3Heat Transfer Research Group, Department of Mechanical Engineering, São Carlos School of Engineering (EESC), University of São Paulo (USP), Av. Trabalhador São Carlense, 400, São Carlos, SP, 13566-590, BrazilUNESP - São Paulo State University, School of Engineering, Post-Graduation Program in Mechanical Engineering, Av. Brasil, 56, Ilha Solteira, SP, 15385-000, Brazil; UNIGRAN - Centro Universitário da Grande Dourados, Balbina de Matos 2121, Jd. Universitário, Dourados, MS, 79824-900, BrazilUNESP - São Paulo State University, School of Engineering, Post-Graduation Program in Mechanical Engineering, Av. Brasil, 56, Ilha Solteira, SP, 15385-000, BrazilUNESP - São Paulo State University, School of Engineering, Post-Graduation Program in Mechanical Engineering, Av. Brasil, 56, Ilha Solteira, SP, 15385-000, Brazil; UNESP - São Paulo State University, Câmpus of São João da Boa Vista, São João da Boa Vista, Brazil; Corresponding author. UNESP - São Paulo State University, School of Engineering, Post-Graduation Program in Mechanical Engineering, Av. Brasil, 56, Ilha Solteira, SP, 15385-000, Brazil.The evolution of the processes for modifying/manufacturing surfaces has facilitated the advancement in pool boiling research with surfaces capable of increasing the heat transfer coefficient (HTC) and the critical heat flux (CHF) through micro/nanostructures heating surfaces. The hybrid processes, which associate the removal or addition of material for the formation of microstructures followed by the addition of material for nanostructure formation, combine the benefits achieved with different intensification techniques in search of superior performance in boiling heat transfer. The thermal performance of pool boiling on surfaces with a combination of microfins and nanostructured surfaces, through nanoparticle deposition, was studied by using HFE-7100 at saturated conditions. The microtextured surfaces were nanostructured by boiling alumina nanofluid with 0.0007 vol%, applying a fixed heat flux of 500 kW/m2. The experimental boiling tests on hierarchical surfaces indicate a significant enhancement in the HTC (up to 65% compared to the microtextured surfaces) due to improved density of nucleation site and vapor bubble dynamics. The maximum heat flux corresponds to the maximum experimental heat transfer coefficient; the nanoparticle deposition on microtextured surfaces enhances the liquid absorption capacity, improving the surface's rewetting and delaying the dryout occurrence.http://www.sciencedirect.com/science/article/pii/S2214157X21006997Pool boilingHierarchically structured surfacesMaximum heat fluxHeat transfer performance |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Erivelto dos Santos Filho Igor Seicho Kiyomura Bruno Alves de Andrade Elaine Maria Cardoso |
spellingShingle |
Erivelto dos Santos Filho Igor Seicho Kiyomura Bruno Alves de Andrade Elaine Maria Cardoso Pool boiling performance of HFE-7100 on hierarchically structured surfaces Case Studies in Thermal Engineering Pool boiling Hierarchically structured surfaces Maximum heat flux Heat transfer performance |
author_facet |
Erivelto dos Santos Filho Igor Seicho Kiyomura Bruno Alves de Andrade Elaine Maria Cardoso |
author_sort |
Erivelto dos Santos Filho |
title |
Pool boiling performance of HFE-7100 on hierarchically structured surfaces |
title_short |
Pool boiling performance of HFE-7100 on hierarchically structured surfaces |
title_full |
Pool boiling performance of HFE-7100 on hierarchically structured surfaces |
title_fullStr |
Pool boiling performance of HFE-7100 on hierarchically structured surfaces |
title_full_unstemmed |
Pool boiling performance of HFE-7100 on hierarchically structured surfaces |
title_sort |
pool boiling performance of hfe-7100 on hierarchically structured surfaces |
publisher |
Elsevier |
series |
Case Studies in Thermal Engineering |
issn |
2214-157X |
publishDate |
2021-12-01 |
description |
The evolution of the processes for modifying/manufacturing surfaces has facilitated the advancement in pool boiling research with surfaces capable of increasing the heat transfer coefficient (HTC) and the critical heat flux (CHF) through micro/nanostructures heating surfaces. The hybrid processes, which associate the removal or addition of material for the formation of microstructures followed by the addition of material for nanostructure formation, combine the benefits achieved with different intensification techniques in search of superior performance in boiling heat transfer. The thermal performance of pool boiling on surfaces with a combination of microfins and nanostructured surfaces, through nanoparticle deposition, was studied by using HFE-7100 at saturated conditions. The microtextured surfaces were nanostructured by boiling alumina nanofluid with 0.0007 vol%, applying a fixed heat flux of 500 kW/m2. The experimental boiling tests on hierarchical surfaces indicate a significant enhancement in the HTC (up to 65% compared to the microtextured surfaces) due to improved density of nucleation site and vapor bubble dynamics. The maximum heat flux corresponds to the maximum experimental heat transfer coefficient; the nanoparticle deposition on microtextured surfaces enhances the liquid absorption capacity, improving the surface's rewetting and delaying the dryout occurrence. |
topic |
Pool boiling Hierarchically structured surfaces Maximum heat flux Heat transfer performance |
url |
http://www.sciencedirect.com/science/article/pii/S2214157X21006997 |
work_keys_str_mv |
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