Investigational Survey of Heat Transfer in Heat Exchanger Containing Al2O3 as Nano-Fluid

Nisreen Rahmah; Abdulhassan Karamallaha; Laith Habeeb

doi:10.71229/njemcs.v1i1.2

Authors

Nisreen Mezher Rahmah University of Almustansiriyah, Mechanical Engineering Department, Baghdad, Iraq
Abdulhassan A. Karamallaha University of Technology, Mechanical Engineering Department, Baghdad, Iraq
Laith Jaafer Habeeb University of Technology, Training and Workshops Center, Baghdad, Iraq

DOI:

https://doi.org/10.71229/njemcs.v1i1.2

Keywords:

Heat transfer , Nano-Fluid , Heat Exchanger

Abstract

In this work, the flow and the improvement of transference of heat features of distilled water and metal oxide of Al₂O₃ as Nanofluid are studied. The concentrations of nanoparticles in distilled water are 0.1, 1, 3, % by volume in a dual-pipe heat exchanger have been considered. It is composed of concentric tubes with a length of 82 cm. External tube from PVC with length (50.8 mm) and internal tube from Copper with length (12.7 mm). The cooling fluid flows in the annulus at atmospheric temperatures are (23-33) °C whereas the hot fluid flows in the internal tube at temperatures are (40, 50, 60 and 70) °C. The outcomes exhibit that the temperature rises as moving from the water to Nanofluid, whereas the average temperature alongside the inner pipe in common stay constant with the rise in the rate of flow. Likewise, the alteration in fluid characteristic raises the Nusselt number values. The Nanofluid has a Nusselt number higher than the water. The Nusselt number of Nanofluid rise with rising concentration (0.1, 1 and 3 %), as the concentration rises, the Nusselt number rises to (25.5) at (flow rate 1.5 L/min, T=70 ^oC, and ϕ=3 %). The pressure drop rise (164.8 pa) with rising concentration. Friction factor drops (0.04) at ϕ=3 % as Reynolds number rises.

References

[1] Cheng, L., 2009. Nanofluid heat transfer technologies. Recent Patents on Engineering, 3(1), pp.1-7.

[2] Mansour, R.B., Galanis, N. and Nguyen, C.T., 2011. Experimental study of mixed convection with water–Al2O3 nanofluid in inclined tube with uniform wall heat flux. International Journal of Thermal Sciences, 50(3), pp.403-410.

[3] Murugesan, C., Tamilkolundu, S., ''Mechanism of Forced Convective Heat Transfer in Al2O3/Water Nanofluid under Laminar and Turbulent Flow'', 2nd International Conference on Chemical, Ecology and Environmental Sciences (ICCEES'2012) Singapore April 28-29, pp 71-75.

[4] Heyhat, M.M., Kowsary, F., Rashidi, A.M., Esfehani, S.A.V. and Amrollahi, A., 2012. Experimental investigation of turbulent flow and convective heat transfer characteristics of alumina water nanofluids in fully developed flow regime. International Communications in Heat and Mass Transfer, 39(8), pp.1272-1278.

[5] Demir, H., Dalkilic, A.S., Kürekci, N.A., Duangthongsuk, W. and Wongwises, S., 2011. Numerical investigation on the single phase forced convection heat transfer characteristics of TiO2 nanofluids in a double-tube counter flow heat exchanger. International Communications in Heat and Mass Transfer, 38(2), pp.218-228.

[6] Akbari, M., Galanis, N. and Behzadmehr, A., 2011. Comparative analysis of single and two-phase models for CFD studies of nanofluid heat transfer. International Journal of Thermal Sciences, 50(8), pp.1343-1354.

[7] Moraveji, M.K., Darabi, M., Haddad, S.M.H. and Davarnejad, R., 2011. Modeling of convective heat transfer of a nanofluid in the developing region of tube flow with computational fluid dynamics. International communications in heat and mass transfer, 38(9), pp.1291-1295.

[8] Hasan, W.F., 2008. Theoretical and Experimental Study to Finned Tubes Cross Flow Heat Exchanger, MSc, thesis, University of Technology, Iraq-Baghdad.

[9] Incropera, F. B., and Doot, D. B., 1986. "Principles of Heat Transfer", McGraw-Hill Co.

[10] Munson, B.R., Okiishi, T.H., Huebsch, W.W. and Rothmayer, A.P., 2013. Fluid mechanics. Singapore: Wiley.

[11] American Society of Heating Refrigeration, and Air Conditioning Engineers, 2009. “ASHRAE

Fundamentals Handbook “, Chapter 22, pp.22.1-22.21.

[12] Vajjha, R.S., Das, D.K. and 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), pp.4607-4618.