Iranian Journal of Mechanical Engineering Transactions of ISME

Iranian Journal of Mechanical Engineering Transactions of ISME

experimental study of the effect of multi wall Carbon nano tube - water nano fluid on heat transfer in a non metallic double pipe heat exchanger

Author
Abstract
In the present research the effect of adding multi wall Carbon nano tubes (with 10-15 nano meter diameter) on the heat transfer coefficient of a heat exchanger is investigated. This work is performed by a co current flexible double pipe heat exchanger made of PVDF. To this end, the viscosity and thermal conductivity of nano fluids is measured experimentally for various temperatures and concentrations. The nano fluid temperature is set at 35°C, 40°C, 45°C and 50°C. The flow rate of nano fluid inside the inner tube was adjusted at 100 , 200 , 300  while, the cold water flow rate of the outer tube is 100 The results shows that heat transfer coefficient of the heat exchanger improves with increasing the fluid temperature, concentration and flow rate. The most effective factor on the heat transfer coefficient is flowrate. Obtained results indicate that using this nano fluid enhances heat transfer coefficient 75%.
Keywords

Subjects


[1]Choi., S.U.S., "Enhancing Thermal Conductivity of Fluids with Nanoparticles, Developments and Applications of Non-Newtonian Flows",Vol. 231, No. 66, pp. 99-105, (1995).
 
 [2] Masuda, H., Ebata, A., Teramae, K., and Hishinuma, N., "Alteration of Thermal Conductivity and Viscosity of Liquid by Dispersing Ultra-fine Particles (Dispersion of γ-Al2O3, SiO2,and TiO2 Ultra-fine Particles", Netsu Bussei (Japan), Vol. 4, No. 4, pp. 227-233, )1993(.
 [3] Wang, X., Choi, S. U. S., and Xu, X., "Thermal Conductivity of Nano Particle Fluid Mixture", Journal of Thermophysics and Heat Transfer, Vol. 13, pp. 474-480,1999(.
 
]4[ نوید بزرگان، فرشاد پناهی زاده، نریمان بزرگان، "بررسی کاربرد نانو سیالات اتیلن گلیکول- اکسید آلومنیوم به عنوان سیال خنک کننده در مبدل حرارتی دو لوله‌ای"، مجله علمی پژوهشی مهندسی مکانیک مدرس، دانشگاه تربیت مدرس، دوره 11، شماره 3، ص 75-84، (1390).
 
[5] Amrollahi, A., Rashidi, A.M., Lotfi, R., Emami Meibodi, M., and Kashefi, K., "Convection Heat Transfer of Functionalized MWNT in Aqueous Fluids in Laminar and Turbulent Flow at the Entrance Region", International Communications in Heat and Mass Transfer, Vol.  37, pp. 717-723 (2010).
 
[6] Talaei, Z., Mahjoub, A. R., Rashidi, A.M., Amrollahi, A., and Emami Meibodi, M., "The Effect of Functionalized Group Concentration on the Stability and Thermal Conductivity of Carbon Nanotube Fluid as Heat Transfer Media", International Communications in Heat and Mass Transfer, Vol. 34, pp. 513, (2011).
 
[7] Esfe, M.H., Saedodin, S., Mahian, O., and Wongwises, S., "Thermophysical Properties, Heat Transfer and Pressure Drop of COOH-functionalized Multi Walled Carbon Nanotubes/water Nanofluids", International Communications in Heat and Mass Transfer, Vol. 58, pp. 176–183, (2014).
 
 [8] Xie, H., Lee, W., Youn, M., and Choi, "Nanofluids Containing Multi Walled Carbon Nanotubes and their Enhanced Thermal Conductivities", Journal of Applied Physics, Vol. 94, pp. 4967-4971, (2003).
 
[9] Ding, Y., Alias, H., Wen, D., and Williams, R. A., "HeatTransferofAqueousSuspensionsofCarbonNanotubes (CNTNanofluids)", InternationalJournalofHeatandMassTransfer, Vol. 49, pp. 240 -250, (2006).
 
]10[ ابراهیم حسینی پور، سعید زینالی هریس، مهدی شنبدی، "بررسی تجربی ضریب انتقال حرارت و افت فشار نانوسیال نانولوله کربن- آب تحت بار حرارتی ثابت"، مجله مهندسی مکانیک مدرس، دوره 14، شماره، (1393).
 
[11] Lotfi, R., Rashidi, A.M., and Amrollahi, A., "Experimental Study on the Heat Transfer Enhancement of MWNT Water Nanofluid in a Shell and Tube Heat Exchanger", International Communications in Heat and Mass Transfer, Vol. 39, pp. 108–111, (2012).
 
]12[ محمدپور جعفرقلی، قنبرعلی شیخ زاده، "مطالعه عددی جریان آشفته نانو سیالات حاوی نانو لوله کربنی در یک مبدل حرارتی دولوله ای با جریان مخالف"، دانشگاه کاشان، (1381).
 
[13] Joen, C., Park, Y., Wang, Q., Sommers, A., Han, X., and Jacobi, A., "A Review on Polymer Heat Exchangers for HVAC&R Applications", International Journal of Refrigeration, Vol.  32, pp. 763-779, (2009).
 
[14] Shokouhmand, H., and Sangtarash, F., "The Effect of Flexible Tube Vibration on Pressure Drop and Heat Transfer in Heat Exchangers Considering Viscous Dissipation Effects", Heat Mass Transfer, 10.1007/s00231-008-0388-2, (2008).
 [15] Aghayari, R., Maddah, H., Zarei, M., Dehghani, M., and Ghanbari Kaskari Mahalle, S., "Heat Transfer of Nanofluid in a Double Pipe Heat Exchanger", Hindawi Publishing Corporation, International Scholarly Research Notices, Article ID 736424, (2014).
 
[16] Chavda, N.K., Patel, J. R., and Patel, H.H., and Parmar, A.A., "Effect of Nanofluid on Heat Transfer Characteristics of Double Pipe Heat Exchanger: Part-i: Effect of Aluminum Oxide Nanofluid", IJRET. 2319-1163, (2013).
 
[17] He, Y., Jin, Y., Chen, H., Ding, D., and Cang, H. Lu., "Heat Transfer and Flow Behavior of Aqueous Suspensions of TiO2 Nanoparticles (nano β luids) Flowing Upward Through a Vertical Pipe", International Journal of Heat and Mass Transfer, Vol. 50, No. 11, pp. 2272-2281, (2007).
Volume 20, Issue 2 - Serial Number 51
Fluid Mechanics and Heat Transfer
Spring 2018
Pages 40-53

  • Receive Date 12 April 2017
  • Revise Date 12 August 2017
  • Accept Date 23 September 2017