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The Experimental Study of Nanoparticles Effect on Thermal Efficiency of Double Pipe Heat Exchangers in Turbulent Flow | ||
| Challenges in Nano and Micro Scale Science and Technology | ||
| مقاله 6، دوره 2، شماره 2، مهر 2014، صفحه 140-148 اصل مقاله (841.96 K) | ||
| نوع مقاله: Original Research Paper | ||
| شناسه دیجیتال (DOI): 10.7508/tpnms.2014.02.006 | ||
| نویسندگان | ||
| R. Aghayeri* 1؛ H. Maddah2؛ F. Ashori1؛ M. Aghili1 | ||
| 1Shahrood Branch, Islamic Azad University, Shahrood, I.R. Iran | ||
| 2Department of Chemistry, Sciences Faculty, Arak Branch, Islamic Azad University, Arak, I.R.Iran | ||
| چکیده | ||
| In this work, the characteristics of flow and heat transfer of a fluid containing nano particles of aluminum oxide with the water volume fraction (0.1-0.2-0.3)(V/V) percent of the reports. The overall heat transfer coefficient, heat transfer and the average heat transfer fluid containing nano water - aluminum oxide in a horizontal double pipe counter flow heat exchanger under turbulent flow conditions is studied. In the present study, aluminum oxide nanoparticles with a diameter of about 20 nm are used. The results show that the overall heat transfer coefficient and the overall heat transfer fluid based on nano-fluid heat transfer coefficient is slightly higher (up to about 5-12 percent).Nano-fluid heat transfer coefficient and average heat transfer increased with nano-fluid mass flow rate increases with increasing temperature and water nano-fluid, fluid temperature increases and Heated (Author) nano-fluid heat transfer coefficient is greatly influenced. The use of nano-fluid pressure may cause slight errors in the calculation. | ||
| کلیدواژه‌ها | ||
| Nano particles؛ Double-pipe؛ Heat Exchanger؛ turbulent flow؛ Heat transfer coefficient | ||
| مراجع | ||
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[1] S. Choi, Developments and applications of non-Newtonian flows 452 (66) (1995) 99–105. [2] W. Dongsheng, D. Yulong, Experimental investigation into convective heat transfer of nanofluids at the entrance region under laminar flow conditions, Int. J. Heat and Mass Transfer 47(2004) 5181-5188. [3] X.W. Wang, X.F. Xu, S.U.S. Choi, Thermal conductivity of nanoparticle-fluid mixture, J.Thermophys. Heat Transfer 13(1999)474-480. [4] S. Lee, S.U.S Choi, Measuring thermal conductivity of fluids containing oxide nano particles, J. Heat Transfer 121(1999) 280-289. [5] P.Keblinski, S.R. Philpot, Mechanisms of heat flow in suspensions of nano-sized particles nano (nano fluids), Int. J. Heat Mass Transfer 45 (2002) 855-863. [6] S. Lee, , S.U.S. Choi, Applications of metallic nanoparticle suspensions in advanced cooling systems, International Mechanical Engineering Congress and Exposition, Atlanta, USA. (1996). [7] Y.M. Xuan, Q. Li, Investigation on convective heat transfer and flow features of nanofluids, ASME J. Heat Transfer 125 (2003) 151-155. [8] Y. He, Y . Jin, H. Chen, Y. Ding, D. Cang, H. Lu, Heat transfer and flow behavior ofaqueous suspensions of TiO2 nanoparticles (nanofluids) flowing upward through a pipe Int. J .Heat Mass Transfer 50 (2007) 22-72. | ||
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