Scholarlink

<p>The use of solid longitudinal fins to enhance the heat transfer rate within Latent Heat Thermal Energy Storage (LHTES) noticeably obstructs convection currents of the liquid Phase Change Material (PCM) during melting. This study investigates the impact of perforations on the melting and solidification characteristics of the PCM, considering different perforation shapes (circular, oval, and slit), sizes (2, 3, and 4&#xa0;mm), and locations (near the fin’s free end, at the center, and near the fin’s base). A comprehensive computational fluid dynamics model was developed using ANSYS and validated with experimental observations. Results showed that perforated fins with circular, oval, and slit holes improved the average fluid velocity by 18.20%, 21.65%, and 32.70%, respectively. Among all options, oval-shaped holes were recommended for achieving a 6.67% higher heat transfer coefficient. Parametric studies revealed that smaller holes reduced the complete cycle time, while larger holes provided higher energy storage/retrieval capacity. Overall, a 3&#xa0;mm hole size with holes positioned near the free end of the fins was recommended, considering both energy storage/retrieval density and cycle time. Further investigation revealed a novel hybrid fins design, combining perforated and solid fins, which reduced melting time by 23.40% and solidification time by 6.50%, adding substantial value to LHTES systems over traditional sensible heat storage systems.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Thermodynamic analysis of fin perforation in phase change material-based thermal energy storage systems: a numerical study

  • 期刊论文

  • 发表日期：

    2025年9月23日

查看全文
  • Nishant Modi,
  • Xiaolin Wang,
  • Michael Negnevitsky,
  • Dia Milani

摘要

The use of solid longitudinal fins to enhance the heat transfer rate within Latent Heat Thermal Energy Storage (LHTES) noticeably obstructs convection currents of the liquid Phase Change Material (PCM) during melting. This study investigates the impact of perforations on the melting and solidification characteristics of the PCM, considering different perforation shapes (circular, oval, and slit), sizes (2, 3, and 4 mm), and locations (near the fin’s free end, at the center, and near the fin’s base). A comprehensive computational fluid dynamics model was developed using ANSYS and validated with experimental observations. Results showed that perforated fins with circular, oval, and slit holes improved the average fluid velocity by 18.20%, 21.65%, and 32.70%, respectively. Among all options, oval-shaped holes were recommended for achieving a 6.67% higher heat transfer coefficient. Parametric studies revealed that smaller holes reduced the complete cycle time, while larger holes provided higher energy storage/retrieval capacity. Overall, a 3 mm hole size with holes positioned near the free end of the fins was recommended, considering both energy storage/retrieval density and cycle time. Further investigation revealed a novel hybrid fins design, combining perforated and solid fins, which reduced melting time by 23.40% and solidification time by 6.50%, adding substantial value to LHTES systems over traditional sensible heat storage systems.