Experimental Analysis on Heat Exchanger using Al2O3-CuO Hybrid Nano Coolant

V. Kranti Raj Sameer*, A. Swarna Kumari**
* CSIR-Central Mechanical Engineering Research Institute, Durgapur, West Bengal, India.
** Department of Mechanical Engineering, Jawaharlal Nehru Technological University, Kakinada, Andhra Pradesh, India.
Periodicity:February - April'2022
DOI : https://doi.org/10.26634/jme.12.2.18474

Abstract

This research work gives the insight on heat transfer performance of nano coolants using hybrid nanoparticles Al2O3-CuO in mixture ratio 20:80, 50:50, 80:20 respectively, at 0.1 vol% of 5 liter base fluid (mono ethylene glycol (MEG)+ deionized water (DW)) on a double pipe shell and tube heat exchanger. Nanoparticles were prepared using ball milling, magnetic stirring and ultra-sonication. The average diameter of crystallites of hybridized nanoparticles was in the range of 25 nm to 35 nm, determined using an X-ray diffractometer. Specific heat capacity, density and kinematic viscosity were determined using differential scanning calorimetry, Redwood viscometer and precision balance, respectively. Modifications were done on the cold side of the heat exchanger by installing a tank at the top for the nano coolant. The flow rates on cold fluid side was fixed to 1.2 L/min and hot fluid side varied from 0.6 L/min to 1.2 L/min operated on both, parallel flow and counter flow arrangement. Coolant sample 80:20 (Al2O3:CuO) amongst all the samples possessed highest rate of effectiveness with an increment of 35% when compared to traditional sample DW + MEG and also with water. Highest logarithmic mean temperature difference (LMTD) and overall heat transfer coefficient (OHTC) were observed for the above sample. Smidgen amount of agglomeration had been observed while conducting the experiment.

Keywords

Hybrid Nanoparticles, Heat Exchanger, Effectiveness, Logarithmic Mean Temperature Difference (LMTD), Overall Heat Transfer Coefficient (OHTC).

How to Cite this Article?

Sameer, V. K. R., and Kumari, A. S. (2022). Experimental Analysis on Heat Exchanger using Al2O3-CuO Hybrid Nano Coolant. i-manager’s Journal on Mechanical Engineering, 12(2), 10-21. https://doi.org/10.26634/jme.12.2.18474

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