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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Boiling flow of graphene nanoplatelets nano-suspension on a small copper disk

Texto completo
Autor(es):
Goodarzi, Marjan [1] ; Tlili, Iskander [2] ; Moria, Hazim [3] ; Cardoso, E. M. [4] ; Alkanhal, Tawfeeq Abdullah [5] ; Anqi, Ali E. [6] ; Safaei, Mohammad Reza [7, 8, 9]
Número total de Autores: 7
Afiliação do(s) autor(es):
[1] Ton Duc Thang Univ, Fac Environm & Labour Safety, Sustainable Management Nat Resources & Environm R, Ho Chi Minh City - Vietnam
[2] Majmaah Univ, Dept Mech & Ind Engn, Coll Engn, Al Majmaah 11952 - Saudi Arabia
[3] Yanbu Ind Coll, Dept Mech Engn Technol, Yanbu Al Sinaiyah City 41912 - Saudi Arabia
[4] UNESP Univ Estadual Paulista, Dept Mech Engn, Ave Brazil Ctr 56, BR-15385000 Ilha Solteira, SP - Brazil
[5] Majmaah Univ, Coll Engn, Dept Mechatron & Syst Engn, Al Majmaah 11952 - Saudi Arabia
[6] King Khalid Univ, Dept Mech Engn, Coll Engn, Abha 61421 - Saudi Arabia
[7] Duy Tan Univ, Inst Res & Dev, Da Nang 550000 - Vietnam
[8] Duy Tan Univ, Fac Elect Elect Engn, Da Nang 550000 - Vietnam
[9] King Abdulaziz Univ, Fac Sci, Dept Math, NAAM Res Grp, POB 80259, Jeddah - Saudi Arabia
Número total de Afiliações: 9
Tipo de documento: Artigo Científico
Fonte: Powder Technology; v. 377, p. 10-19, JAN 2 2021.
Citações Web of Science: 7
Resumo

In the present work, an attempt was made to experimentally quantify the boiling heat transfer coefficient (BHTC) of graphene oxide-water nano-suspension (NS) inflow boiling heat transfer regime. The NS was prepared at weight fractions of 0.025, 0.05, and 0.1% using the two-step method and further stabilized for 17 days (at wt% = 0.1). Results showed that the presence of graphene oxide nanoplatelets (GNPs) imposed an extreme fouling thermal resistance (FTR) to the surface, which caused a reduction in the BHTC over 1000 min of continuous operation after the CHF point. This was mainly due to the presence of the graphene oxide on the surface, which created a surficial fouling layer and heat accumulation on the surface. Instead, the sedimentation layer promoted the critical heat flux (CHF) point such that the point for water was 1370 kW/m(2) reaching 1640 kW/m(2) for NS at wt% = 0.1. Likewise, the highest BHTC of 17.4 kW/(m(2)K) at Re = 10,950 was obtained. Also, with increasing the heat flux and flow rate, the BHTC increased. The same trend was also identified with a mass fraction of GNPs up to CHF point. The increase in the BHTC was attributed to the intensification of the Brownian motion and thermophoresis effect in the boiling micro-layer close to the surface. (C) 2020 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 13/15431-7 - Análise da aplicação de nanotecnologia em processos térmicos e de conversão de energia
Beneficiário:Elaine Maria Cardoso
Linha de fomento: Auxílio à Pesquisa - Jovens Pesquisadores
Processo FAPESP: 19/02566-8 - Caracterização experimental do desempenho térmico e hidrodinâmico de dissipadores de calor microaletados durante a ebulição convectiva
Beneficiário:Elaine Maria Cardoso
Linha de fomento: Auxílio à Pesquisa - Regular