Document Type : Original Article
Authors
Department of Physics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Abstract
In this study, functionalized carbon nanotubes decorated with silver and copper nanoparticles (fCNTs-Ag, fCNTs-Cu) with mass ratios of 2% and 4% have been used to prepare ethylene glycol (EG) based nanofluids with different concentrations (0.1, 0.25 and 0.5 wt.%). The main goal of this research is the investigation of the effect of passing time on the thermal conductivity and stability of EG-based nanofluids. The thermal conductivity of samples was measured by a Decagon KD2 Pro thermal analyzer device for 90 days. The results showed that in all samples, the thermal conductivity of nanofluids was increased with increasing the concentration of nanoadditives. In addition, it was surprisingly observed that the thermal conductivity of samples was exponentially increased by passing time. The stability of the samples was investigated using UV-vis spectroscopy for 60 days. It was observed that the stability of nanofluids containing fCNTs-Cu is higher than the stability of nanofluids containing fCNTs-Ag.
Keywords
- thermal conductivity
- hybrid nanofluids
- stability
- UV-vis spectroscopy
- KD2 Pro thermal analyzer device
Main Subjects
- H Adun, D Kavaz, and M Dagbasi, Journal of Cleaner Production 328 (2021) 129525.
- S Mukherjee, S Wciślik, P C Mishra, and P Chaudhuri, Particuology 87 (2024) 147.
- N Gupta, S M Gupta, and S K Sharma, Materials Today: Proceedings 36 (2021) 649.
- S Porgar, H F Oztop, and S Salehfekr, Journal of Molecular Liquids 386 (2023) 122213.
- K Y Leong, I Razali, K Z Ku Ahmad, H C Ong, M J Ghazali, and M R Abdul Rahman, International Communications in Heat and Mass Transfer 90 (2018) 23.
- H Younes, M Mao, S M S Murshed, D Lou, H Hong, and G P Peterson, Applied Thermal Engineering 207 (2022) 118202.
- A K Singh, B P Panda, S Mohanty, S K Nayak, and M K Gupta, Journal of Materials Science: Materials in Electronics 28 (2017) 8908.
- J E Gravesa, E Latvytė, A Greenwood, and N G Emekwuru, Ultrasonics Sonochemistry 55 (2019) 25.
- G Huminic, A Huminic, F Dumitrache, C Fleacă, and I Morjan, Powder Technology 367 (2020) 347.
- K Y Leong, K Z Ku Ahmad, H C Ong, M J Ghazali, and A Baharum, Renewable and Sustainable Energy Reviews 75 (2017) 868.
- H Babar and H M Ali, Journal of Molecular Liquids 281 (2019) 598.
- M V Bindu and G M Joselin Herbert, Synthetic Metals 287 (2022) 117058.
- N Jha and S Ramaprabhu, Journal of Physical Chemistry C 112 (2008) 9315.
- A Amiri, M Shanbedi, H Eshghi, S Zeinali Heris, and M Baniadam, Journal of Physical Chemistry C 116 (2012) 3369.
- N Jha and S Ramaprabhu, Journal of Nanofluids 1 (2012) 63.
- M Farbod and A Ahangarpour, Physics Letters A 380 (2016) 4044.
- Y Gu, S Xu, and X Wu, Heat and Mass Transfer 54 (2018) 1847.
- M Shanbedi, A Amiri, S Zeinali Heris, H Eshghi, and H Yarmand, Journal of Thermal Analysis and Calorimetry 131 (2018) 1089.
- A Ahangarpour and M Farbod, Physics and Chemistry of Liquids 56 (2018) 9.
- W Yu and S U S Choi, Journal of Nanoparticle Research 5 (2003) 167.
- M M Heyhat, A Rajabpour, M Abbasi, and S Arabha, Journal of Molecular Liquids 264 (2018) 699.
- W Fan and F Zhong, ACS Omega 5 (2020) 27972.
- Z Rao, R Bai, K Ye, and T Zhou, Case Studies in Thermal Engineering 35 (2022) 102087.
- X Jin, R Wang, L Huang, and C Shao, Powder Technology 429 (2023) 118945.
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