06.2020.94.105

Experimental Enhancement of Helical Coil Tube Heat Exchanger Using CuFe2O4/Water Nanofluids

Author(s):
Ahmed H. Mola†*, Ali Habeeb Askar‡, Ghaed k. salman‡†

Affiliation(s):

† University of Technology, Baghdad-Iraq

‡ Mechanical Engineering Department, University of Technology, Baghdad-Iraq

‡† Nanotechnology and Advanced Materials Research Center

Corresponding Author Email: 20189@uotechnology.edu.iq, 20156@uotechnology.edu.iq,11633@uotechnology.edu.iq

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

One of the mainly common ways used to heat transfer is by using different types of heat exchangers. New studies have shown that nanofluids suspended in conventional heat transfer fluid groups higher heat transfer capabilities due to its elevated thermal conductivity. In this paper, nanofluids are suspended metallic or non-metallic nanopowder from 1nm to 100 nm in base fluid water and are synthesized to provide considerable preferences over conventional heat transfer fluids. By improving the thermos physical properties of nanofluid, heat transfer characteristics can be increased. In this research, we have prepared nanomaterial’s and tests were carried out and expected to get good results in improving the heat transfer from them. The test rig used for is two types of helical coil heat exchangers A and B. A change in coil temperature, heat transfer rate, and heat transfer coefficients in order to change the concentration of the size of the nanoparticles. The consequences indicate that the attendance an enhancement in Nusselt number of the nanofluid with respect to the water reached the maximum value (15, 18 , 22) % for nanofluid volume concentrations (0.02, 0.05, 0.1) %, respectively for coil A and the maximum value of 14%, 17%, and 20% for ferrofluid volume concentrations (0.02, 0.05, 0.1) %, respectively for coil B. of 0.01%, 0.05%. The results: It is designated that in relation to the mass flow rate and the rate of heat transfer for the nano, it specifies that it enhance noticeably compared to water. Where the increase is 10%, 20% and 30% for each concentration. It specifies to vast ranges working and geometrical parameters.