Abstract
Present work elaborates the effect of inlet velocity of air and solid particle feed rate on holdup mass and heat transfer characteristics in a cyclone heat exchanger. The RNG k-ɛ turbulence model was adopted for modeling high turbulence flow and Discrete phase model (DPM) to track solid particles in a cyclone heat exchanger by ANSYS FLUENT software. The effect of inlet air velocity (5 to 25 m/s) and inlet solid particle feed rate of (0.2 to 2.5 g/s) at different particle diameter (300 to 500 μm) on holdup mass and heat transfer rate in cyclone heat exchanger was studied at air inlet temperature of 473 K. Results show that holdup mass and heat transfer rate increase with increase in inlet air velocity and inlet solid particle feed rate. Influence of solid particle feed rate on holdup mass has more significance. Experimental setup was built for high efficiency cyclone. Good agreement was found between experimental and simulation pressure drop. Empirical correlation was derived for dimensionless holdup mass and Nusselt number based on CFD data by regression technique. Correlation predicts dimensional holdup mass with +5% to -8% errors of experimental data and Nusselt number with +9% to -3%.
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Recommended by Associate Editor Ji Hwan Jeong
T. Mothilal is an Associate professor in Mechanical Engineering at TJS Engineering College, affiliated to Anna University Chennai, approved by AICTE. Currently he is pursuing His Ph.D. as a part time research scholar from Anna University Chennai.
K. Pitchandi is a Professor and Head of Mechanical Engineering at Sri Venkateswara College of Engineering aflliated to Anna University. His Ph.D. is in energy conservation using thermodynamic optimization. He is currently executing an AICTE funded project worth of 16 lakhs in the area of Internal combustion Engineering.
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Mothilal, T., Pitchandi, K. Influence of inlet velocity of air and solid particle feed rate on holdup mass and heat transfer characteristics in cyclone heat exchanger. J Mech Sci Technol 29, 4509–4518 (2015). https://doi.org/10.1007/s12206-015-0950-z
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DOI: https://doi.org/10.1007/s12206-015-0950-z