International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 06 | Jun 2025
p-ISSN: 2395-0072
www.irjet.net
OPTIMIZATION OF HEAT EXCHANGER EFFECTIVENESS AND EXERGY PERFORMANCE USING ALUMINUM OXIDE NANOFLUIDS Mohd Faizal Ansari1, Shiv Kumar2 1M.Tech. (ME) Scholar, Department of Mechanical Engineering, Goel Institute of Technology and Management
Lucknow, Uttar Pradesh, India
2Assistant Professor, Department of Mechanical Engineering, Goel Institute of Technology and Management
Lucknow, Uttar Pradesh, India ----------------------------------------------------------------------***--------------------------------------------------------------------incorporation of solid particles into a fluid may Abstract: This study investigates a parallel flow
substantially enhance its thermal conductivity. Numerous experimental studies have been conducted in recent decades to examine the potential effects and mechanisms underlying the enhanced thermal conductivity in heat transfer resulting from the incorporation of solid particles into various base fluids.
configuration in a three-channel, single-pass corrugated plate heat exchanger. Heat exchangers are engineered to transmit energy effectively from a hot fluid to a cold fluid while reducing expenses.
In the experiment, the heated fluid traverses the middle channel with inlet temperatures between 40°C and 70°C, while cold water circulates through the upper and lower channels at varying temperatures. Al2O3 nanoparticles are incorporated into the cold fluid in various quantities to improve performance. The findings demonstrate a 68% enhancement in heat exchanger performance attributable to the use of Al2O3 nanoparticles. The maximal heat transfer rate rises with an increase in the weight percentage of Al2O3 nanoparticles in the cold fluid and the inlet temperature of the hot water.
The resulting fluids demonstrate enhanced heat transfer properties, including elevated convective heat transfer coefficients and thermal conductivity, without significantly altering their physical and chemical features when solid particles are suspended inside them. This significant improvement in heat transmission may result in lower energy and material input, smaller equipment, lower prices, and increased system efficiency under ideal operating conditions. Because of its strong ionic interatomic connections, alumina, sometimes called aluminum oxide, is a mineral with many beneficial qualities. It can exist in severa l crystalline phases at high temperatures, all of which return to the stable hexagonal alpha phase. Being the hardest and most rigid oxide ceramic, this phase is extremely beneficial for a wide range of applications. It is also renowned for having outstanding thermal, refractory, and dielectric qualities. Furthermore, up to 19–25°C, alumina provides protection in oxidizing and reducing conditions. At temperatures between 1700°C and 2000°C, it can also maintain its integrity in a vacuum, with a weight loss range of 10-7 to 10-6 cm2/sec. With the exception of wet fluorine and hydrofluoric acid, it is resistant to all common chemicals and gases. However, especially at lower purity levels, alkali metal vapors might result in hightemperature attack. It is feasible to improve a variety of desired material qualities by altering the composition of the ceramic body. Solid particles like alumina have demonstrated promise in enhancing heat transfer characteristics in fluids, which could lead to higher efficiency and lower costs in a variety of applications. Additional study and advancement in this area may result in creative approaches to energy conservation and improved heat transmission mechanisms
The research illustrates the capability of Al 2O3 nanoparticles to improve the efficacy of a corrugated plate heat exchanger configured in a parallel flow arrangement. The incorporation of these nanoparticles into the cold fluid enhances both the efficiency of the heat exchanger and the peak heat transfer rate. Moreover, the exergy loss is markedly diminished, leading to a more effective heat exchange mechanism. These findings indicate that the incorporation of nanoparticles in heat exchangers may result in significant energy savings and cost reductions across multiple applications.
Keywords: Corrugated plate heat exchanger, aluminum oxide nanoparticles, parallel flow, heat transfer enhancement, exergy loss reduction, nanofluid optimization
1.
INTRODUCTION
It is well established that solids generally possess greater thermal conductivity than fluids at standard temperatures. At normal temperature, aluminum's thermal conductivity is 400 times superior to that of water. Consequently, it is anticipated that the
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