An investigation of heat transfer in heat exchange devices with spirally-coiled twisted-ducts using nanofluid

Functionalized graphene nanoplatelet nanofluids based on a commercial industrial antifreeze for the thermal performance enhancement of wind turbines

“…Thermal characterization is an essential step for determining heat transfer performance in real applications and gives a hint of the potential of nanofluids [22,23]. Based on these studies, diverse experimental and numerical tests have been carried out for analysing the thermal performance of nanofluids in real applications, reporting heat transfer enhancements [23][24][25][26][27]. In the literature, there are multiple experimental works, which prove that thermal conductivity, main indicator of heat transfer performance, is significantly risen by the addition of nanoparticles to a base fluid.…”

An enhanced hybrid model for batch sugar crystallization based on the pattern recognition for overall heat transfer coefficient using a machine learning approach

“…These configurations resulted in an increase in the performance index of the heat exchanger by up to 3.21 for a Reynolds number of approximately 1800. Additionally, other geometrically modified heat exchangers, such as spirally coiled twisted configurations (Khoshvaght‐Aliabadi et al, 2018) and corrugated channels (Khoshvaght‐Aliabadi et al, 2019), were investigated to enhance heat exchanger performance. Moreover, researchers have explored methods such as artificially inducing vortex generation to enhance heat transfer rates around the heat exchanger tubes (Chokphoemphun et al, 2015; Khoshvaght‐Aliabadi et al, 2016).…”

Numerical investigation of laminar heat transfer and fluid flow characteristics of Al2O3nanofluid in a double tube heat exchanger

“…Passive methods use different types of extended surfaces, and elements are used instead of external power (Bhattacharyya et al , 2022; Thapa et al , 2021). Some of the main techniques in passive method are turbulator insertion (Wijayanta et al , 2019; Khoshvaght-Aliabadi et al , 2016b), using nanofluids (Duangthongsuk and Wongwises, 2010), geometry changes (Wang et al , 2019; Farnam et al , 2018), extended surface area (fins) (Ravikumar and Raj, 2021; Tavousi et al , 2023) and a combination of these techniques, such as a combination of vortex-generator and geometry change with nanofluids (Khoshvaght-Aliabadi et al , 2018b; Khoshvaght-Aliabadi et al , 2016a; Khoshvaght-Aliabadi et al , 2018a). The combined method uses the effects of the active and passive methods in combination (Alam and Kim, 2018).…”