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

Author(s)

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]}

Affiliation

^[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

• Document type: Journal article
• Source: Powder Technology; v. 377, p. 10-19, JAN 2 2021.
• Web of Science Citations: 7

Abstract

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)

• FAPESP's process: 13/15431-7 - Application of nanotechnology in thermal processes and energy conversion
• Grantee: Elaine Maria Cardoso
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 19/02566-8 - Hydrodynamic and thermal characteristics of single and two-phase flow in micro pin fin heat sinks
• Grantee: Elaine Maria Cardoso
• Support Opportunities: Regular Research Grants