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Thermal Performance Evaluation of Micro Pin–Fin Heat Exchangers: Part I—Geometrical Design Parameters Optimization

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Abstract

In this work, evaluation of thermal losses formulated on the “Entropy Generation Minimization” (EGM) approach is performed to design arrayed micro pin–fin (MPF) heat sinks. The thermodynamic approach primarily evaluates the effects of different thermal parameters: thermal resistance, pressure drop, Nusselt number, etc. The objective function in the EGM is formulated using the search-based Particle swarm optimization (PSO) algorithm on MATLAB® to optimize the dimensional parameters of the MPFs. The characteristic length, height, inter-MPF gaps, cross-sectional area, perimeter, and density of the MPFs are considered decisive design parameters for geometrical Optimization in inline and staggered patterns. The PSO code has run for 1000 iterations at optimal operating parameters. Eventually, the staggered pattern of the arrayed heat sink showed a prospective reduction in design parametric values over the inline pattern for constant heat sink volume and thermal loading conditions. The optimal design parameters are used to model various unconventional cross-sectional profiles, viz. elliptical, aerofoil, droplet, and piranha, of MPFs for numerical simulations. The manufacturing feasibility of the optimized profile of the MPFs heat sink is explored and verified for near-net-shape fabrication using a popular and novel microfabrication technology, presented in Part II of the work.

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  1. Hreetabh Kishore

    Present address: Tennessee Tech University, Cookeville, TN, USA

Authors and Affiliations

  1. Indian Institute of Technology Ropar, Rupnagar, Punjab, 140001, India

    Hreetabh Kishore, Mainak Pal, Chandrakant K. Nirala & Anupam Agrawal

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Correspondence to Chandrakant K. Nirala.

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Kishore, H., Pal, M., Nirala, C.K. et al. Thermal Performance Evaluation of Micro Pin–Fin Heat Exchangers: Part I—Geometrical Design Parameters Optimization. Int. J. Precis. Eng. Manuf. 25, 245–254 (2024). https://doi.org/10.1007/s12541-023-00925-1

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