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<p>In thermal energy storage devices, phase change materials are preferred because of their slightly different temperatures and better storage densities. Numerous challenges must be addressed in the process of developing PCM and implementing it in storage systems. Through experimental research and numerical simulations, this work assessed the charging times of three PCM materials. As part of the experimental setup, a storage tank was built for testing and randomly placed capsules containing paraffin, stearic, and myristic were then combined with a water tank kept at a consistent temperature for additional evaluation. Furthermore a numerical study was developed to see how the phase change material affects the charging time with the same surface area. ANSYS FLUENT Software was used to investigate a spherical capsule with three PCMs: paraffin wax, stearic acid, and myristic acid with flow rates of 2 lit/min, 4 lit/min, and 6 lit/min. The findings show that higher flow rates (6 lit/min) cause a significantly faster increase in temperature than lower flow rates (2, 4 lit/min). And also myristic acid reduces melting time by 6.25 % compared to paraffin wax, while stearic acid reduces melting time by 12.5 % compared to paraffin wax.</p>

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Experimental and numerical investigation of three phase change materials (PCM) in spherical capsules

  • 期刊论文

  • 发表日期：

    2025年9月2日

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  • E. Siva Reddy,
  • R. Meenakshi Reddy,
  • K. Hemachandra Reddy

摘要

In thermal energy storage devices, phase change materials are preferred because of their slightly different temperatures and better storage densities. Numerous challenges must be addressed in the process of developing PCM and implementing it in storage systems. Through experimental research and numerical simulations, this work assessed the charging times of three PCM materials. As part of the experimental setup, a storage tank was built for testing and randomly placed capsules containing paraffin, stearic, and myristic were then combined with a water tank kept at a consistent temperature for additional evaluation. Furthermore a numerical study was developed to see how the phase change material affects the charging time with the same surface area. ANSYS FLUENT Software was used to investigate a spherical capsule with three PCMs: paraffin wax, stearic acid, and myristic acid with flow rates of 2 lit/min, 4 lit/min, and 6 lit/min. The findings show that higher flow rates (6 lit/min) cause a significantly faster increase in temperature than lower flow rates (2, 4 lit/min). And also myristic acid reduces melting time by 6.25 % compared to paraffin wax, while stearic acid reduces melting time by 12.5 % compared to paraffin wax.