Experimental study on enhanced heat transfer using TiO2–ethylene glycol–water nanofluid in a double-pipe heat exchanger.
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| Title: | Experimental study on enhanced heat transfer using TiO |
|---|---|
| Authors: | Song, Jinwei1 (AUTHOR), Li, Long1 (AUTHOR), Xu, Zuo1 (AUTHOR), Jiang, Weixue1,2,3 (AUTHOR) jiangweixue@yzu.edu.cn, Li, Yanjun1,4 (AUTHOR), Yuan, Qing2 (AUTHOR), Yang, Liu5 (AUTHOR), Li, Shuhong5 (AUTHOR), Jin, Xiansong6 (AUTHOR), Yuan, Jie6 (AUTHOR) |
| Source: | Journal of Thermal Analysis & Calorimetry. Jan2026, Vol. 151 Issue 1, p959-975. 17p. |
| Subjects: | Heat transfer, Heat exchangers, Empirical research, Colloidal stability, Channel flow, Nusselt number, Ethylene glycol, Nanofluids |
| Abstract: | Nanofluids demonstrate significant application potential in the energy and chemical engineering fields due to their unique heat transfer properties. This study employed a two-step method to prepare TiO2 nanofluids using an ethylene glycol–water mixture as the base fluid. The optimal concentration of 0.5 mass%, which exhibited the best dispersion stability as determined by absorbance measurements, was selected for experimental investigation of heat transfer performance in a hollow spiral double-tube heat exchanger. The heat transfer coefficient, heat transfer rate, and Nusselt number (Nu) were analyzed. Experimental results confirmed the reliability of the system, showing a deviation of less than 10% in the heat transfer rate between the water side and the nanofluid side. Within the temperature range of 303 K–328 K, the addition of TiO2 nanoparticles significantly enhanced the heat transfer coefficient. Conversely, a reduction in the heat transfer coefficient was observed in the lower temperature range of 263 K–283 K. Meanwhile, the incorporation of TiO2 nanoparticles led to an increase in the Nusselt number across the tested conditions. The motion and heat transport behavior of nanoparticles within the spiral flow channel were further examined from a microscopic perspective. This work provides experimental evidence and fundamental data supporting the engineering application of TiO2–ethylene glycol nanofluids in hollow spiral double-tube heat exchangers. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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