Enhancement of Convective Heat Transfer by Using Nano-Slurry

• Project/Area Number: 21560209
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Thermal engineering
• Research Institution: Toyohashi University of Technology
• Principal Investigator: KITAMURA Kenzo 豊橋技術科学大学, 大学院・工学研究科, 教授 (20126931)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2009: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
• Keywords: 対流 / 伝熱促進 / ナノスラリー / 対流伝熱 / 強制対流 / 管内流 / 衝突噴流 / 伝熱 / 熱物性値測定 / 自然対流 / 物性値測定

Research Abstract

Enhancement of heat transfer by use of nano-slurry has been investigated experimentally. Thermal properties of water-based 10wt% Al_2O_3 nano-slurry were measured firstly. The slurry showed 7% higher thermal conductivity than that of the water. Heat transfer by the forced convection from the heated pipe to the nano-slurry was subsequently measured. The result showed that the Nusselt numbers are almost the same between the nano-slurry and water. The identical result was also obtained for the heat transfer by the impinging jet of nano-slurry and water.