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首页> 外文期刊>Building and Environment >Evaluation of the thermal performance of frame walls enhanced with paraffin and hydrated salt phase change materials using a dynamic wall simulator
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Evaluation of the thermal performance of frame walls enhanced with paraffin and hydrated salt phase change materials using a dynamic wall simulator

机译：使用动态墙模拟器评估用石蜡和水合盐相变材料增强的框架墙的热性能

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摘要

The incorporation of phase change materials (PCMs) in building materials for use as latent heat storage and for potential reduction of energy requirements is an on-going field of study. In this paper, the development and testing of PCM-enhanced cellulose insulation for use in frame walls is presented. Two types of PCMs, paraffin-based and hydrated salt-based, were mixed into loose-fill cellulose insulation at concentrations of 10% and 20% (by the weight of the wallboard) in a 1.22 m × 1.22 m (48 in. × 48 in.) frame wall cavity. The thermally-enhanced frame walls were heated and allowed to cool down in a dynamic wall simulator that replicated the sun's exposure in a wall of a building on a typical summer day. Peak heat fluxes, total "daily" heat flows, and surface and air temperatures were measured and recorded. Results show that the paraffin-based PCM-enhanced insulation reduced the average peak heat flux by up to 9.2% and reduced the average total "daily" heat flow up to 1.2%. Because of the hydroscopic behavior of un-encapsulated hydrated salt, the hydrated salt-based PCM-enhanced insulation did not provide any thermal storage benefit.
机译：将相变材料（PCM）掺入建筑材料中以用作潜热存储并潜在地降低能源需求是一个持续不断的研究领域。本文介绍了用于框架墙的PCM增强纤维素绝缘材料的开发和测试。将两种类型的PCM（基于石蜡和基于水合盐）以1.22 m×1.22 m（48英寸×）的浓度分别以10％和20％（以墙板的重量计）混合到松散的纤维素绝缘材料中。 48英寸）框架壁腔。将热增强的框架墙加热并在动态墙模拟器中冷却，该模拟器在典型的夏季将阳光的照射复制到建筑物的墙壁上。测量并记录峰值热通量，总“每日”热流量以及表面和空气温度。结果表明，基于石蜡的PCM增强绝热材料将平均峰值热通量减少了多达9.2％，并将平均“每日”总热流减少了多达1.2％。由于未封装的水合盐的吸湿性，基于水合盐的PCM增强隔热材料没有提供任何热存储优势。

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