Performance Analysis of Heat Sinks With Phase-Change Materials Subjected to Transient and Cyclic Heating |
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Authors: | Sandip Kumar Saha Pradip Dutta |
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Affiliation: | 1. Department of Mechanical Engineering, Indian Institute of Technology, Bombay, Mumbai, Indiasandip.saha@iitb.ac.in;3. Department of Mechanical Engineering, Indian Institute of Science, Bangalore, India |
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Abstract: | Phase-change cooling technique is a suitable method for thermal management of electronic equipment subjected to transient or cyclic heat loads. The thermal performance of a phase-change based heat sink under cyclic heat load depends on several design parameters, namely, applied heat flux, cooling heat transfer coefficient, thermophysical properties of phase-change materials (PCMs), and physical dimensions of phase-change storage system during melting and freezing processes. A one-dimensional conduction heat transfer model is formulated to evaluate the effectiveness of preliminary design of practical PCM-based energy storage units. In this model, the phase-change process of the PCM is divided into melting and solidification subprocesses, for which separate equations are written. The equations are solved sequentially and an explicit closed-form solution is obtained. The efficacy of analytical model is estimated by comparing with a finite-volume-based numerical solution for both transient and cyclic heat loads. |
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