Study on impact of various nanofluid types on heat exchanger cooling performance

Hassan, Muhammad Ariff Imran (2022) Study on impact of various nanofluid types on heat exchanger cooling performance. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Nanofluids containing scattered nanoparticles have been demonstrated to be a viable option for heat removal applications. Nanofluid nanostructures might be utilized to cool electrical devices in novel ways. The microchannel heat sink is more effective in dissipating heat. As a result, the electrical equipment is more excellent than if the microchannel heat sink was not used. In this study, the impact of various types of nanofluid in straight microchannel heat sink is, to determine the impact of various nanofluid by using simulation on heat exchanger cooling performance and to analyze the effect of flow characteristic with various types of nanofluid. Examined respectively, by using TiO₂ and ZnO nanofluid in the simulation by using ANSYS Fluent software. Overall, the dimension of the test piece is 4mm(W) × 4mm(L) × 2mm(H) and consists of 11 channels. The dimension of channel is 0.1mm(W) × 0.2mm(H) Meanwhile for the nanofluid is using concentration (1%, 2%, and 8%) for both nanofluid and the velocity is applied 2m/s. The heat flux generated at the bottom surface of the microchannel used was 160000 W/m². The result show the output velocity and velocity vector when the viscosity of nanofluid is higher, the heat transfer coefficient becomes lower because the flow of nanofluid becomes slower. It shows that all various types of nanofluid be the same result because of the viscosity of nanofluid. The comparison is being made between nanofluid TiO₂/water and ZnO/water with different concentrations. The best for cooling performance is TiO₂/water. The temperature is 297.11 K because it can absorb more thermal conductivity at the same velocity of 3.34 m/s. The nanofluid ZnO/water has the same velocity; the temperature is 296.95 K. Using ANSYS Fluent software, an analysis has been made to determine the impact of various nanofluids and analyze the effect of flow characteristics with various types of nanofluid. Based on the result, both nanofluids with different concentrations have different outcomes for velocity and temperature. They both have the same characteristic flow, laminar flow because there is no obstacle in the channel nanofluid.

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