An Experimental Study of Nanofluids Operated Shell and Tube Heat Exchanger with Air Bubble Injection

Authors

Department of Mechanical Engineering, Chandigarh University, Gharuan, Punjab, India

Abstract

Shell and Tube heat exchangers are the heat exchangers that are most widely used in industries and for other commercial purposes. There are many techniques that have been utilized to enhance the heat transfer performance of the shell and tube heat exchangers. Air bubble injection is one of the promising and inexpensive techniques that can create turbulence in the fluids resulting in to enhancement of heat transfer characteristics of the shell and tube heat exchangers. In this paper, experimental study of heat transfer characteristics have been done by injecting air bubbles at tube inlet and throughout the tube for 0.1%v/v and 0.2%v/v Al2O3 nanoparticle concentration. Results obtained at two different injection points for both concentrations are compared with the case when no air bubble injection is done. The results showed the enhancement in the heat transfer characteristics with air bubble injection and volumetric concentration of nanoparticles. The maximum enhancement was found to be in the case where air bubbles are injected throughout the tube which is followed by the air bubble injection at the tube inlet and without air bubble injection. As the bubbles were injected throughout the tube, approximately 22-33% enhancement was observed. The overall heat transfer coefficient with injecting air bubbles throughout the tube showed an enhancement of about 12-23% and 14-25% for 0.1% and 0.2% of nanofluids.

Keywords


1.     Kahrom, M., Haghparast, P. and Javadi, S., "Optimization of heat transfer enhancement of a flat plate based on pareto genetic algorithm",  (2010), 177-190.

2.     Ahmadzadehtalatapeh, M. and Yau, Y., "Energy conservation potential of the heat pipe heat exchangers: Experimental study and predictions", International Journal of Engineering,  Vol. 25, No. 3, (2012), 193-199.

3.     Cancan, Z., Yafei, L., Li, W., Ke, X. and Jinxing, W., "Review heat exchanger: Research development of self-rotating inserts in heat exchanger tubes", International Journal of Engineering-Transactions A: Basics,  Vol. 27, No. 10, (2014), 15-26.

4.     Gabillet, C., Colin, C. and Fabre, J., "Experimental study of bubble injection in a turbulent boundary layer", International Journal of Multiphase Flow,  Vol. 28, No. 4, (2002), 553-578.

5.     Houshmand, F. and Peles, Y., "Impact of flow dynamics on the heat transfer of bubbly flow in a microchannel", Journal of Heat Transfer,  Vol. 136, No. 2, (2014), 022902, 1-8.

6.     Celata, G., Chiaradia, A., Cumo, M. and D’annibale, F., "Heat transfer enhancement by air injection in upward heated mixed-convection flow of water", International Journal of Multiphase Flow,  Vol. 25, No. 6, (1999), 1033-1052.

7.     Dizaji, S., "Heat transfer enhancement due to air bubble injection into a horizontal double pipe heat exchanger", International Journal of Automotive Engineering,  Vol. 4, No. 4, (2014), 902-910.

8.     Delauré, Y., Chan, V. and Murray, D., "A simultaneous piv and heat transfer study of bubble interaction with free convection flow", Experimental Thermal and Fluid Science,  Vol. 27, No. 8, (2003), 911-926.

9.     Jacob, B., Olivieri, A., Miozzi, M., Campana, E.F. and Piva, R., "Drag reduction by microbubbles in a turbulent boundary layer", Physics of Fluids,  Vol. 22, No. 11, (2010), 115104.

10.   Nandan, A. and Singh, G., "Experimental study of heat transfer rate in a shell and tube heat exchanger with air bubble injection", International Journal of Engineering Transection B: Applications,  Vol. 29, No., (2016), 1160-1166.

11.   A.Nandan and G.singh, "Experimental study of heat transfer performance shell and tube heat exchanger with air bubble injection", International Journal of Engineering, Transactions B: Applications,  Vol. 29, No. 8, (2016), 1160-1166

12.   Kern, D.Q., "Process heat transfer, Tata McGraw-Hill Education,  (1950).

13.   Baghban, S.N., Moghiman, M. and Salehi, E., "Thermal analysis of shell-side flow of shell-and-tube heat exchanger using experimental and theoretical methods", International Journal of Engineering,  Vol. 13, No. 1, (2000), 15-26.

14.   Wei, X., Zhu, H., Kong, T. and Wang, L., "Synthesis and thermal conductivity of Cu2O nanofluids", International Journal of Heat and Mass Transfer,  Vol. 52, No. 19, (2009), 4371-4374.

15.   Singh, G. and Sarao, T.P.S., "Experimental investigation of heat transfer characteristics of plate heat exchanger using alumina-water based nanofluids at different orientations", Indian Journal of Science and Technology,  Vol. 9, No. 48, (2016), 1-14.

16.   Singh, S., Singh, G. and Singla, A., "Experimental studies on heat transfer performance of double pipe heat exchanger with using baffles and nanofluids", Indian Journal of Science and Technology,  Vol. 9, No. 40, (2016), 1-7.

17.   Singh, G. and Sarao, T., "Experimental analysis of heat transfer and friction factor in plate heat exchanger with different orientations using al2o3 nanofluids", International Journal of Engineering-Transactions A: Basics,  Vol. 29, No. 10, (2016), 1450-1459.

18.   Thakur, M., Gangacharyulu, D. and Singh, G., "An experimental study on thermophysical properties of multiwalled carbon nanotubes", International Journal of Engineering, Transactions B: Applications,  Vol. 30, No. 8, (2017), 1223-1230.

19.   Priya, K.R., Suganthi, K. and Rajan, K., "Transport properties of ultra-low concentration cuo–water nanofluids containing non-spherical nanoparticles", International Journal of Heat and Mass Transfer,  Vol. 55, No. 17, (2012), 4734-4743.

20.   Sundar, L.S., Farooky, M.H., Sarada, S.N. and Singh, M., "Experimental thermal conductivity of ethylene glycol and water mixture based low volume concentration of Al2O3 and cuo nanofluids", International Communications in Heat and Mass Transfer,  Vol. 41, (2013), 41-46.

21.   Ren, Y., Xie, H. and Cai, A., "Effective thermal conductivity of nanofluids containing spherical nanoparticles", Journal of Physics D: Applied Physics,  Vol. 38, No. 21, (2005), 3958-3961.

22.   Fotukian, S. and Esfahany, M.N., "Experimental study of turbulent convective heat transfer and pressure drop of dilute cuo/water nanofluid inside a circular tube", International Communications in Heat and Mass Transfer,  Vol. 37, No. 2, (2010), 214-219.

23.   Tahery, A.A., Khalilarya, S. and Jafarmadar, S., "Effectively designed ntw shell-tube heat exchangers with segmental baffles using flow hydraulic network method", Applied Thermal Engineering,  Vol. 120, (2017), 635-644.

24.   Jafarmadar, S., Tahery, A. and Khalilarya, S., "Hydraulic network modeling to analyze stream flow effectiveness on heat transfer performance of shell and tube heat exchangers", International Journal of Engineering-Transactions C: Aspects,  Vol. 30, No. 6, (2017), 904-911.

25.   Sokhal, G.S., Gangacharyulu, D. and Bulasara, V.K., "Heat transfer and pressure drop performance of alumina–water nanofluid in a flat vertical tube of a radiator", Chemical Engineering Communications,  No. just-accepted, (2017).