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Evaluation of the solidification process in a double‐tube latent heat storage unit equipped with circular fins with optimum fin spacing
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Evaluation of the solidification process in a double‐tube latent heat storage unit equipped with circular fins with optimum fin spacing
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Journal Article
Evaluation of the solidification process in a double‐tube latent heat storage unit equipped with circular fins with optimum fin spacing
2023
Overview
In this study, the effect of fin number and size on the solidification output of a double‐tube container filled with phase change material (PCM) was analyzed numerically. By altering the fins' dimensions, the PCM's heat transfer performance is examined and compared to finless scenarios. To attain optimal performance, multiple inline configurations are explored. In addition, the initial conditions of the heat transfer fluid (HTF), including temperature and Reynolds number, are considered in the analysis. The research results show a significant impact of longer fins with higher numbers on improving the solidification rate of PCM. The solidification rate increases by 67%, 170%, 308%, and 370% for cases with 4, 9, 15, and 19 fins, respectively, all with the same fin length and initial HTF boundary condition. The best case results in a solidification time that is 4.45 times shorter compared to other fin number and dimension scenarios. The study also found that moving from Reynolds numbers 500 to 1000 and 2000 reduced discharging times by 12.9% and 22%, respectively, and increased heat recovery rates by 14.4% and 27.9%. When the HTF entrance temperature was 10°C and 15°C, the coolant temperature showed that the entire discharging time decreased by 37.5% and 23.1% relative to the solidification time when the initial temperature was 20°C. Generally, this work highlights that increasing the length and number of fins enhances thermal efficiency and the phase change process. This research investigates the impact of the number and size of circular fins on the solidification output of a double‐tube container using phase change material. By optimizing the arrangement of the fins using 19 circular fins, the discharge rate improves by 370% compared with the no‐fin heat exchanger change from 38 to 10.2 W.
