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Abstract - This paper describes the synthesis of alumina nanoparticles using sol-gel method. As Nanofluids have unique features different from conventional solid-liquid mixtures. Due to their excellent characteristics, nanofluids find wide applications in enhancing heat transfer. Therefore, a synthesized alumina nanoparticles was used as a nanofluid in double pipe heat exchanger to study and compare the heat transfer enhancement between base fluid (water) and nanofluid.
Key Words - Alumina, nanoparticles, nanofluid, heat transfer, heat enhancement.
I. INTRODUCTION
Metal oxide nano-particales have been extensively developed in the last decades (ten years). Nano-Particles are the Particles in size range 10-9 m are known as nanoparticles or sub-micron particles. They are also known as quantum dots due to quantum property possess by them. OR Nano-particles have been described as 'novel materials whose size of elemental structure has been engineered at the nanometre scale'.Nano-particles have been used as filler in both polymeric nano-composites to improve the mechanical, electrical and optical properties and metallic nanocomposites to control the electrodeposition.
The oxides of aluminium materials are widely used in ceramics, refractories and abrasives due to their hardness, chemical inertness, high melting point, non-volatility and resistance to oxidation and corrosion. Ceramics based on alumina are widely used by modern industry as a construction material with several unique properties such as high mechanical strength and hardness, heat resistance, chemical inertness, and insulation characteristics. Another important application of materials based on alumina is the creation of various catalytically active complexes for the oil industry and cleaning of industrial emissions.
Recently many researchers are showing interest on the preparation and application of nano-sized alumina or alumina composites considering their diverse properties. It is generally believed that the properties of such alumina particles are largely governed by the particle size, morphology, surface and phase homogeneity and these can be controlled by selecting a proper synthetic route. Alumina with desirable surface properties such as high surface area and mesoporous properties is most commonly used as a high-temperature catalyst or catalytic support and as a membrane. Synthesis of nano sized alumina has attracted great attention due to their wide spectrum of application in catalysis, molecular separation, membranes, structural material and adsorbents catalyst. Alumina is one of the inert biomaterials used in implants. It is therefore a biodegradable...