Enhancement of Heat Exchanger Effectiveness by Using Water- Al2O3 as a working substance

International Journal of Thermal Engineering

© 2020 by SSRG - IJTE Journal

Volume 6 Issue 3

Year of Publication : 2020

Authors : Banan N.Abdullah, Adnan M.Alsaffawi

10.14445/23950250/IJTE-V6I3P104

How to Cite?

Banan N.Abdullah, Adnan M.Alsaffawi, "Enhancement of Heat Exchanger Effectiveness by Using Water- Al2O3 as a working substance," SSRG International Journal of Thermal Engineering, vol. 6,  no. 3, pp. 16-20, 2020. Crossref, https://doi.org/10.14445/23950250/IJTE-V6I3P104

Abstract:

In this research, the performance of counter flow double tube heat exchanger of 1m length, 19.0 mm outer diameter, and 9.5 mm inner diameter made from copper has been studied numerically using nano-water as a cold fluid. Al2O3 nanoparticles of 40 nm diameter with a volume concentration of 0.5% have been used with water as base fluid. The cold nano-water flows inside the inner tube at a volume flow rate of 3 Liter/min and 7 Liter/min, which enters the heat exchanger at 15 °C, whereas hot water flows in an annular space of the heat exchanger at a volume flow rate of 5 Liter/min. and enters the heat exchanger at a temperature of 50 C°. ANSYS FLUENT (2020 R1) was used to solve the governing differential equations and to estimate the heat exchanger effectiveness. The results obtained revealed an enhancement in the performance by using nano-water as a working fluid. The maximum heat exchanger effectiveness obtained when using nano - water is 31%, for a volume flow rate of 7 Liter/min.

Keywords:

Double tube heat exchanger, nano-water, overall heat transfer coefficient, the effectiveness of heat exchanger.

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