HEAT TRANSFER CHARACTERISTICS OF PROPYLENE GLYCOL/WATER BASED MAGNESIUM OXIDE NANOFLUID FLOWING THROUGH STRAIGHT TUBES AND HELICAL COILS

Abstract

Forced convective heat transfer studies on glycol based magnesium oxide nanofluids flowing through straight tubes and helical coils under laminar flow and constant wall temperature conditions have been conducted. Propylene glycol – water mixture (60:40 by wt.%) was used as the base fluid and nanofluids with MgO nano- particle volume concentration of 0.66% and 0.3% were used as the working fluids. Results showed that the convective heat transfer coefficient of nanofluid was higher than that of the base fluid for both straight tubes and helical coils. In straight tube, Nusselt number enhancement was 20% w.r.t. base fluid and it increased to 29% with increase in Peclet number from 44000 to 111400 for nanofluid having volume concentration of 0.66%.While in helical coils, maximum enhancement in experimental Nusselt number was found to be 19.5% and 23% at volume concentration of 0.3% and 0.66 % respectively for a curvature ratio of 0.0727 corresponding to a Dean number of 490.Two new correlations have been proposed to predict the heat transfer coefficient of magnesium oxide nanofluid flowing under laminar conditions through straight tube and helical coils. 

Keywords

• Magnesium Oxide,Straight Tube,Helical Coil,Convective Heat Transfer Coefficient,Constant Wall Temperature,Nusselt Number

References

1. [1]Nasiri, M., Etemad, S. G., & Bagheri, R. (2011). Experimental heat transfer of nanofluid through an annular duct. International Communications in Heat and Mass Transfer, 38(7), 958–963.
2. [2]McQuiston, F. C., & Parker, J. D. (1982). Heating, ventilating, and air conditioning: analysis and design.
3. [3]Choi, S. U. S., Singer, D. A., Wang, H. P. (1995) Developments and Applications of Non-Newtonian Flows.
4. [4]Gupta, R., Singh, P., & Wanchoo, R. K. (2013). Heat Transfer Characteristics of Nano-Fluids. Materials Science Forum, 757, 175–195.
5. [5]Saidur, R., Leong, K. Y., & Mohammad, H. A. (2011). A review on applications and challenges of nanofluids. Renewable and Sustainable Energy Reviews, 15(3), 1646–1668.
6. [6]Pak, B. C., & Cho, Y. I. (1998). Hydrodynamic and heat transfer study of dispersed fluids with submicron metallic oxide particles. Experimental Heat Transfer, 11(2), 151–170.
7. [7]Wen, D., & Ding, Y. (2004). Experimental investigation into convective heat transfer of nanofluids at the entrance region under laminar flow conditions. International Journal of Heat and Mass Transfer, 47(24), 5181–5188.
8. [8]Heyhat, M. M., Kowsary, F., Rashidi, A. M., Momenpour, M. H., & Amrollahi, A. (2013). Experimental investigation of laminar convective heat transfer and pressure drop of water-based Al2O3 nanofluids in fully developed flow regime. Experimental Thermal and Fluid Science, 44, 483–489.

9. [9]Hemmat Esfe, M., Saedodin, S., & Mahmoodi, M. (2014). Experimental studies on the convective heat transfer performance and thermophysical properties of MgO-water nanofluid under turbulent flow. Experimental Thermal and Fluid Science, 52, 68–78.
10. [10]Xie, H., Li, Y., & Yu, W. (2010). Intriguingly high convective heat transfer enhancement of nanofluid coolants in laminar flows. Physics Letters, Section A: General, Atomic and Solid State Physics, 374(25), 2566–2568.
11. [11]Xuan, Y., & Li, Q. (2003). Investigation on Convective Heat Transfer and Flow Features of Nanofluids. Journal of Heat Transfer, 125(1), 151.
12. [12]Li, Q., & Xuan, Y. M. (2004). Flow and Heant Transfer Performances of Nanofluids Inside Small Hydraulic Diameter Flat Tube. Journal of Engineering Thermophysics, 25(2), 305-307.
13. [13]Lai, W. Y., Phelan, P. E., Vinod, S., & Prasher, R. (2008). Convective heat transfer for water-based alumina nanofluids in a single 1.02-mm tube. In 2008 11th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems, I-THERM (pp. 970–978).
14. [14]Jung, J. Y., Oh, H. S., & Kwak, H. Y. (2009). Forced convective heat transfer of nanofluids in microchannels. International Journal of Heat and Mass Transfer, 52(1–2), 466–472.
15. [15]Zeinali Heris, S., Nasr Esfahany, M., & Etemad, S. G. (2007). Experimental investigation of convective heat transfer of Al2O3/water nanofluid in circular tube. International Journal of Heat and Fluid Flow, 28(2), 203–210.
16. [16]Anoop, K. B., Sundararajan, T., & Das, S. K. (2009). Effect of particle size on the convective heat transfer in nanofluid in the developing region. International Journal of Heat and Mass Transfer, 52(9–10), 2189–2195.
17. [17]Rea, U., McKrell, T., Hu, L. wen, & Buongiorno, J. (2009). Laminar convective heat transfer and viscous pressure loss of alumina-water and zirconia-water nanofluids. International Journal of Heat and Mass Transfer, 52(7–8), 2042–2048.
18. [18]Xuan, Y., Li, Q., & Hu, W. (2003). Aggregation structure and thermal conductivity of nanofluids. AIChE Journal, 49(4), 1038–1043.
19. [19]Maïga, S. E. B., Nguyen, C. T., Galanis, N., & Roy, G. (2004). Heat transfer behaviours of nanofluids in a uniformly heated tube. In Superlattices and Microstructures (Vol. 35, pp. 543–557).
20. [20]Duangthongsuk, W., & Wongwises, S. (2010). An experimental study on the heat transfer performance and pressure drop of TiO2-water nanofluids flowing under a turbulent flow regime. International Journal of Heat and Mass Transfer, 53(1–3), 334–344.
21. [21]Vajjha, R. S., Das, D. K., & Kulkarni, D. P. (2010). Development of new correlations for convective heat transfer and friction factor in turbulent regime for nanofluids. International Journal of Heat and Mass Transfer, 53(21–22), 4607–4618.
22. [22]Sajadi, A. R., & Kazemi, M. H. (2011). Investigation of turbulent convective heat transfer and pressure drop of TiO 2/water nanofluid in circular tube. International Communications in Heat and Mass Transfer, 38(10), 1474-1478.
23. [23]Asirvatham, L. G., Raja, B., Lal, D. M., & Wongwises, S. (2011). Convective heat transfer of nanofluids with correlations. Particuology, 9(6), 626-631.
24. [24]Kubair, V., & Kuloor, N. R. (1966). Heat transfer to Newtonian fluids in coiled pipes in laminar flow. International Journal of Heat and Mass Transfer, 9(1), 63–75.
25. [25]Schmidt, E. F. (1967). Heat transfer and pressure loss in spiral tubes. Chemie Ingenieur Technik, 39(13), 781.
26. [26]Seban, R. A., & McLaughlin, E. F. (1963). Heat transfer in tube coils with laminar and turbulent flow. International Journal of Heat and Mass Transfer, 6(5), 387–395.
27. [27]Dravid, A. N., Smith, K. A., Merrill, E. W., & Brian, P. L. T. (1971). Effect of secondary fluid motion on laminar flow heat transfer in helically coiled tubes. AIChE Journal, 17(5), 1114–1122.
28. [28]Janssen, L. A. M., & Hoogendoorn, C. J. (1978). Laminar convective heat transfer in helical coiled tubes. International Journal of Heat and Mass Transfer, 21(9), 1197–1206.
29. [29]Manlapaz, R. L., & Churchill, S. W. (1981). Fully developed laminar convection from a helical coil. Chemical Engineering Communications, 9(1–6), 185–200.
30. [30]Cioncolini, A., & Santini, L. (2006). An experimental investigation regarding the laminar to turbulent flow transition in helically coiled pipes. Experimental Thermal and Fluid Science, 30(4), 367–380.
31. [31]Jamshidi, N., Farhadi, M., Sedighi, K., & Ganji, D. D. (2012). Optimization of design parameters for nanofluids flowing inside helical coils. International Communications in Heat and Mass Transfer, 39(2), 311–317.
32. [32]Akhavan-Behabadi, M. A., Pakdaman, M. F., & Ghazvini, M. (2012). Experimental investigation on the convective heat transfer of nanofluid flow inside vertical helically coiled tubes under uniform wall temperature condition. International Communications in Heat and Mass Transfer, 39(4), 556–564.
33. [33]Hashemi, S. M., & Akhavan-Behabadi, M. A. (2012). An empirical study on heat transfer and pressure drop characteristics of CuO-base oil nanofluid flow in a horizontal helically coiled tube under constant heat flux. International Communications in Heat and Mass Transfer, 39(1), 144–151.
34. [34]Mukesh Kumar, P., Kumar, J., Suresh, S. (2012) Heat transfer and friction factor studies in helically coiled tube using Al2O3/water Nanofluid. European Journal of Scientific Research, 82, 161 - 172.
35. [35]Hall, B. D., Zanchet, D., & Ugarte, D. (2000). Estimating nanoparticle size from diffraction measurements. Journal of Applied Crystallography, 33(6), 1335–1341.
36. [36]Davarnejad, R., & Jamshidzadeh, M. (2015). CFD modeling of heat transfer performance of MgO-water nanofluid under turbulent flow. Engineering Science and Technology, an International Journal, 18(4), 536–542.
37. [37]Parsons, R., Kuehn, T. H., Couvillion, R. J., Coleman, J. W., Suryanarayana, N., & Ayub, Z. (2005). ASHRAE Handbook-Fundamentals. ASHRAE Handbook-Fundamentals.
38. [38]Sharma, P., Singh, P., Gupta, R., & Wanchoo, R. K. (2017). Hydrodynamic Studies on MgO Nanofluid Flowing Through Straight Tubes and Coils. Journal of Nanofluids, 6(3), 558-566.
39. [39]Sieder, E. N., & Tate, G. E. (1936). Heat Transfer and Pressure Drop of Liquids in Tubes. Industrial and Engineering Chemistry, 28(12), 1429–1435.
40. [40]Syam Sundar, L., & Sharma, K. V. (2011). Laminar convective heat transfer and friction factor of AL2O3 nanofluid in circular tube fitted with twisted tape inserts. International Journal of Automotive and Mechanical Engineering, 3(1), 265–278.