Heat transfer enhancement of TiO2/water nanofluids flowing inside a square minichannel with a microfin structure: A numerical investigation

Budi Kristiawan, Agung Tri Wijayanta, Koji Enoki, Takahiko Miyazaki, Muhammad Aziz

研究成果: ジャーナルへの寄稿記事

抄録

A combination of two passive heat transfer enhancement techniques using a microfin structure and nanofluids was investigated numerically. TiO2/water nanofluids flowing inside a square minichannel with a microfin structure (SMM) were observed as a practical application. Increased heat transfer performance was investigated by observing the Nusselt number, friction factor, and performance evaluation criterion (PEC). Velocity and temperature profiles were also demonstrated at a laminar developing flow regime. The SMM used in this work had six microfins (N = 6) and TiO2/water nanofluids with various nanoparticle concentrations of 0.005, 0.01, and 0.1 vol.%. By combining nanofluids as working fluids and SMM as a passive heat transfer enhancement, the maximum PEC value of 1.2 was achieved at Re = 380 with a volume fraction of 0.01 vol.%. It is obvious that compared to water flowing inside the square minichannel microfin, the heat transfer can be increased by using only a nanofluid with a volume fraction of 0.01%. The combination of a microfin and nanofluids as working fluids is strongly recommended due to its excellent performance in terms of heat transfer and economic considerations.

元の言語英語
記事番号3041
ジャーナルEnergies
12
発行部数16
DOI
出版物ステータス出版済み - 8 7 2019

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Heat Transfer Enhancement
Nanofluid
TiO2
Numerical Investigation
Heat transfer
Water
Heat Transfer
Volume fraction
Volume Fraction
Performance Evaluation
Fluids
Fluid
Nusselt number
Temperature Profile
Velocity Profile
Nanoparticles
Friction
Economics

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Control and Optimization
  • Electrical and Electronic Engineering

これを引用

Heat transfer enhancement of TiO2/water nanofluids flowing inside a square minichannel with a microfin structure : A numerical investigation. / Kristiawan, Budi; Wijayanta, Agung Tri; Enoki, Koji; Miyazaki, Takahiko; Aziz, Muhammad.

:: Energies, 巻 12, 番号 16, 3041, 07.08.2019.

研究成果: ジャーナルへの寄稿記事

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