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首页> 外文期刊>Journal of Energy Storage >Palm oil for seasonal thermal energy storage applications in buildings: The potential of multiple melting ranges in blends of bio-based fatty acids
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Palm oil for seasonal thermal energy storage applications in buildings: The potential of multiple melting ranges in blends of bio-based fatty acids

机译：棕榈油用于建筑物中的季节性热能储存应用：生物基脂肪酸混合物中多重熔化范围的潜力

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Thermal energy storage using phase change materials (PCMs) plays a significant role in maintaining thermal comfort and reducing energy consumption in buildings because of its property to absorb/release heat within specific temperatures. However, the relatively sharp transition range of the most common high-performance components only allows designing case-and seasonal-specific envelope solutions. In this view, the use of nonspecialized bio-based solutions such as vegetable oils, which exhibit two different and broader phase transitions might be an opportunity for long-term passive building applications. In this work, an innovative PCM macrocapsule filled with bio-based phase change material (palm oil) is developed and tested under real atmospheric conditions. An additional macro-capsule is produced using two commercially available high-performance products (Rubitherm RT5 and RT31) characterized by similar peak transition temperatures, for bench-marking purpose. Results show that the relatively wider transition range of the bio-based material could represent a relatively cheaper win-win solution for both winter and summer applications. In summer conditions, in particular, a maximum time lag of about 1 h and 15 min is registered at the inner surface of a representative roof stratigraphy, while in winter conditions, the minimum temperature value at the inner layer raises from-2.5 degrees C to about 1.5 degrees C with a time lag of about 2 h. Globally, the non-specialized bio-based product demonstrated a good potential for seasonal building applications, together with the need for further investigation and optimization processes.
机译：使用相变材料（PCM）的热能存储在维持在建筑物中的热舒适度并降低建筑物中的能量消耗方面起着重要作用，因为其特性在特定温度内吸收/释放热量。然而，最常见的高性能组件的相对清晰的过渡范围仅允许设计案例和季节性的信封解决方案。在这种观点中，使用非专科化的生物基溶液如植物油，展示了两种不同和更广泛的相变，这可能是长期无源建筑应用的机会。在这项工作中，在真正的大气条件下开发和测试了一种填充有基于生物的相变材料（棕榈油）的创新的PCM宏观胶囊。使用两个可商购的高性能产品（Rubitherm RT5和RT31）制造另外的宏胶囊，其特征在于具有类似的峰值过渡温度，用于基准标记目的。结果表明，对冬季和夏季应用的生物基材料的相对更广泛的转换范围可以代表相对更便宜的双赢解决方案。特别地，在夏季条件下，在代表性屋顶地层的内表面上注册了大约1小时和15分钟的最大时间滞后，而在冬季条件下，内层的最小温度值从-2.5摄氏度升高到大约1.5度C的时间滞后约为2小时。在全球范围内，非专业化的生物基产品展示了季节性建筑应用的良好潜力，以及需要进一步调查和优化过程。

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