Experimental and CFD Analysis of GW70 based Cu Nanofluids in a Parallel Flow Heat Exchanger 
M. L.R. Chaitanya Lahari1, P.H.V. Sesha Talpa Sai P.2, K.V. Sharma3, K.S. Narayanaswamy4, Haseena Bee5, S. Devaraj6
1M.L.R. Chaitanya Lahari, Research Scholar, School of Mechanical Engineering, Reva University, Bangalore, India.
2P.H.V. Sesha Talpa Sai, Professor & Director-R&D, Department of Mechanical Engineering, Malla Reddy College of Engineering and Technology, Hyderabad, India.
3K.V. Sharma, Emeritus Professor, Centre for Energy Studies, Jawaharlal Nehru Technological University, Hyderabad, India.
4K.S. Narayanaswamy, Professor & Director, School of Mechanical Engineering, Reva University, Bangalore, India.
5P. Haseena Bee, Research Scholar, School of Mechanical Engineering, Reva University, Bangalore, India.
6S. Devaraj, Professor, School of Mechanical Engineering, Reva University, Bangalore, India.
Manuscript received on October 04, 2021. | Revised Manuscript received on October 18, 2021. | Manuscript published on November 30, 2021. | PP: 106-110 | Volume-10 Issue-4, November 2021. | Retrieval Number: 100.1/ijrte.D65871110421| DOI: 10.35940/ijrte.D6587.1110421
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: The Nusselt number, overall heat transfer, and convective heat transfer coefficients of glycerol-water-based Cu nanofluids flowing in a parallel flow double pipe heat exchanger are estimated using CFD analysis. Single-phase fluid approach technique is used in the analysis. Ansys 19.0 workbench was used to create the heat exchanger model. Heat transfer tests with nanofluids at three flow rates (680<Re<1900) are carried out in a laminar developing flow zone. For testing, a 500 mm long concentric double pipe heat exchanger with tube dimensions of ID=10.2 mm, OD= 12.7 mm, and annulus dimensions of ID=17.0 mm, OD= 19.5 mm is employed. Copper is utilized for the tube and annulus material. This study employed three-particle volume concentrations of 0.2 percent, 0.6 percent, and 1.0 percent. The mass flow rates of hot water in the tube are 0.2, 0.017, and 0.0085 kg/s, while the mass flow rates of nanofluids in the annulus are 0.03, 0.0255, and 0.017 kg/s. The average temperature of nanofluids is 36°C, whereas hot water is 58°C. In comparison to base liquid, the overall heat transfer coefficient and convective HTC of 1.0 percent copper nanofluids at 0.03 kg/s are raised by 26.2 and 46.2 percent, respectively. The experimental findings are compared to CFD values, and they are in close agreement.
Keywords: Glycerol-water mixture, CFD analysis, double pipe heat exchanger, convective heat transfer, overall heat transfer, Cu nanofluids.