A comprehensive material and experimental investigation of a packed bed latent heat storage system based on waste foundry sand
A comprehensive material and experimental investigation of a packed bed latent heat storage system based on waste foundry sand
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DOI：
10.1016/j.energy.2024.130920
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发表时间：
2024-05
期刊：
影响因子：
9
通讯作者：
Abdalqader Ahmad;A. Anagnostopoulos;M. Navarro;Yelaman Maksum;Shivangi Sharma;Yulong Ding
中科院分区：
文献类型：
--
作者：
Abdalqader Ahmad;A. Anagnostopoulos;M. Navarro;Yelaman Maksum;Shivangi Sharma;Yulong Ding
欧盟的工业部门丢弃了约18.9%的能源作为废热，其中大部分有回收的潜力。本研究通过专注于相变材料（PCM）封装在工业废铸造砂（WFS）中的潜热热能储存（LHTES）的进步来解决这一挑战。WFS，一个有问题的副产品，被重新用作NaNO 3和太阳能盐PCM的支持性基质，为有效集成到高温工业过程中而量身定制。本文提供了一个彻底的机械和热检查的WFS-salt相变材料，突出其改进的热稳定性，性能，和兼容性与直接热能系统。复合PCM的熔点非常适合工业废热应用，NaNO 3的能量密度为542.0 ± 8.3 kJ/kg，太阳能盐的能量密度为516.0 ± 4.5 kJ/kg，基于这些CPCM的实验级联PBLHS容量为262兆焦，旨在模拟450 °C的工业热源，进行了系统的测试，以评估其在重复充电/放电和自然冷却循环中的能量密度和效率。其整体系统效率为68.5%。这些发现将WFS-salt PCM定位为一种有前途的和对环境有益的方法，以提高工业能源效率和利用率。
The EU's industrial sector discards about 18.9% of its energy as waste heat, much of which has the potential for recovery. This study addresses the challenge by focusing on the advancement of latent heat thermal energy storage (LHTES) using phase change materials (PCMs) encapsulated within industrial waste foundry sand (WFS). WFS, a problematic by-product, is repurposed as a supportive matrix for NaNO3and solar salt PCMs, tailored for effective integration into high-temperature industrial processes. The paper provides a thorough mechanical and thermal examination of the WFS-salt PCMs, highlighting their improved thermal stability, performance, and compatibility with direct thermal energy systems. The composite PCMs demonstrated melting points well-suited for industrial waste heat applications and achieved an energy density of 542.0 ± 8.3 kJ/kg for NaNO3and 516.0 ± 4.5 kJ/kg for solar salt, An experimental cascade PBLHS, based on these CPCMs, with a capacity of 262 MJ, designed to mimic an industrial heat source at 450 °C, was systematically tested to assess its energy density and efficiency over repeated charging/discharging and free cooling cycles. Its overall system efficiency is found to be 68.5%. These findings position WFS-salt PCMs as a promising and environmentally beneficial approach to enhance industrial energy efficiency and utilisation.