Extensive analysis of PCM-based heat sink with different fin arrangements under varying load conditions and variable aspect ratio
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2023-09-12 |
| Journal | Journal of Energy Storage |
| Authors | Muthamil Selvan Nedumaran, Nagarajan Gnanasekaran, Kamel Hooman |
| Institutions | Delft University of Technology, National Institute of Technology Karnataka |
| Citations | 21 |
Abstract
Section titled āAbstractā<p>The present study compares a modified variable height fin heat sink with the conventional constant height fin heat sink. The two heat sinks are filled with an equal volume of PCM (n-eicosane) and a fin volume fraction of 8 %. The experiments are performed for constant loads and also different power surge conditions. The pulsed heat loads are applied for two scenarios: 1. Constant load 4 W - power surge and constant load 4 W - power surge - 1800 s no-load condition, and 2. Power surge (50 s, 100 s, and 150 s) - no-load conditions of 1800 s. During experiments, the proposed variable height fin heat sinks possess better thermal performance for all load scenarios. Further, a 3D computational model is developed using ANSYS Fluent 19 to assess not only the effect of fin arrangement for different aspect ratios but also the impact of fin shape. The enclosure aspect ratio employed for the given study ranges from 0.3 to 0.8 for both the heat sinks. Regarding the fin structure in a heat sink, four types of fin shapes are adopted: square, circular, diamond, and triangular. The contour images of temperature and the liquid fraction are shown for the charging process. For the discharging process, the time required for the heat sinks to completely solidify the PCM is discussed. From the outcomes, variable height fin heat sinks provide enhanced melting/solidification for all the aspect ratios and fin shapes considered. As the aspect ratio increases, the time difference between the heat sink for the completion of the discharging cycle is reduced. Moreover, the triangular shaped fin shows a higher enhancement percentage of 2.29 % and 1.43 % during melting and 6.25 % and 12.5 % during solidification for both the heat sinks, respectively.</p>
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2020 - Numerical investigation of natural convection behavior of molten PCM in an enclosure having rectangular and tree-like branching fins [Crossref]
- 2021 - Numerical investigation of PCM melting using different tube configurations in a shell and tube latent heat thermal storage unit
- 2022 - Numerical analysis of multiple phase change materials based heat sink with angled thermal conductivity enhancer
- 2011 - Three-dimensional transient cooling simulations of a portable electronic device using PCM (phase change materials) in multi-fin heat sink [Crossref]
- 2022 - Unveiling the role of filler surface energy in enhancing thermal conductivity and mechanical properties of thermal interface materials [Crossref]
- 2023 - Multi-objective optimization of hybrid heat sinks with phase change materials
- 2021 - Investigation of the effect of thermal resistance on the performance of phase change materials [Crossref]
- 2018 - Transient performance of a PCM-based heat sink with a partially filled metal foam: effects of the filling height ratio [Crossref]
- 2018 - Thermal performance of copper foam/paraffin composite phase change material [Crossref]
- 2020 - Effect of phase change and ambient temperatures on the thermal performance of a solid-liquid phase change material based heat sinks [Crossref]