Thermal Performance Enhancement of Heat Exchangers Using Nanofluids Under Turbulent Flow Conditions

Power generating, chemical processing, and HVAC systems are just a few of the many industries that rely on heat exchangers. With the need for more efficient systems and rising energy prices, improving the thermal performance of engineering systems is a key engineering goal. Conventional heat transfer fluids include ethylene glycol, water, and oil. Having said that, their usefulness is limited because to their low thermal conductivity.  The solution to that dilemma was the creation of nanofluids. Nanofluids have liquids as their foundation fluids. Nanofluid heat exchangers with turbulent flow are the focus of this investigation into their thermal properties. The flow pattern, concentration, kind of nanoparticles, and Reynolds number are used to analyze the heat transfer and pressure drop properties. A comprehensive analysis is conducted to compare nanofluids with conventional fluids using numerical and experimental methods. The test computes the heat transfer coefficient, Nusselt number enhancement, and friction factor using computational fluid dynamics (CFD) simulations and empirical correlations. Research shows that at higher Reynolds numbers, convective heat transfer is enhanced by nanofluids because they cause more turbulent mixing of the fluid.  There is a need to optimize the improvement, but it comes at a cost—a bigger pressure drop. The results show that significant gains in thermal efficiency can be accomplished with little to no increase in energy consumption provided the right nanoparticle concentration and flow conditions are used. Researchers hope that a better understanding of nanofluids' characteristics will lead to more sophisticated thermal systems. Heat exchangers can be designed and operated more efficiently, which in turn reduces energy consumption, according to this article.