Investigation of counterflow microchannel heat exchanger with hybrid nanoparticles and pcm suspension as a coolant
Hasan M.I. Khafeef M.J. Mohammadi O. Bhattacharyya S. Issakhov A.
2021Hindawi Limited
Mathematical Problems in Engineering
2021#2021
The effect of the hybrid suspension on the intrinsic characteristics of microencapsulated phase change material (MEPCM) slurry used as a coolant in counterflow microchannel heat exchanger (CFMCHE) with different velocities is investigated numerically. The working fluid used in this paper is a hybrid suspension consisting of nanoparticles and MEPCM particles, in which the particles are suspended in pure water as a base fluid. Two types of hybrid suspension are used (Al2O3 +MEPCM and Cu + MEPCM), and the hydrodynamic and thermal characteristics of these suspensions flowing in a CFMCHE are numerically investigated. The results indicated that using hybrid suspension with high flow velocities improves the performance of the microchannel heat exchanger while resulting in a noticeable increase in pressure drop. Thereupon, it causes a decrease in the performance index. Moreover, it was found that the increment of the nanoparticles concentration can rise the low thermal conductivity of the MEPCM slurry, but it also leads to a noticeable increase in pressure drop. Furthermore, it was found that as the thermal conductivity of Cu is higher than that for Al2O3, the enhancement in heat transfer is higher in case of adding Cu particles compared with Al2O3 particles. Therefore, the effectiveness of these materials depends strongly on the application at which CFMCHE is employed.
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Mechanical Engineering Department, College of Engineering, University of Thi-Qar, Nasiriyah, Iraq
Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran
Center for Renewable Energy and Environment Development, Department of Mechanical Engineering, Birla Institute of Technology and Science, Pilani Campus, Vidya Vihar, Pilani, Rajasthan, 333 031, India
Faculty of Mechanics and Mathematics, Department of Mathematical and Computer Modelling, Al-Farabi Kazakh National University, Almaty, Kazakhstan
Mechanical Engineering Department
Department of Mechanical Engineering
Center for Renewable Energy and Environment Development
Faculty of Mechanics and Mathematics
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