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Development and testing of PCM doped cool colored coatings to mitigate urban heat island and cool buildings

机译:PCM掺杂的冷色涂料的开发和测试,以减轻城市的热岛和凉爽的建筑物

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摘要

In this study the performance of organic PCMs used as latent heat storage materials, when incorporated in coatings for buildings and urban fabric, is investigated. Thirty six coatings of six colors containing different quantities of PCMs in different melting points were produced. Accordingly, infrared reflective (cool) and common coatings with the same binder system and of the same color were prepared for a comparative thermal evaluation. The samples were divided in six groups of different color and eight samples each: three PCM coatings of different melting temperatures (18 ℃, 24 ℃, 28 ℃) each one of two different PCM concentrations (20% w/w, 30% w/w), an infrared reflective and a common coating of matching color. Surface temperature of the samples was recorded at a 24 h basis during August 2008. The results demonstrate that all PCM coatings present lower surface temperatures than infrared reflective and common coatings. Analysis of the daily temperature differences showed that peak temperature differences occur between PCM and common or cool coatings from 7 am to 10 am. Investigating the temperature gradient revealed that for this time period the values for PCM coatings are lower compared to infrared reflective and common. From 10 am to 12 pm, temperature gradients for all coatings have similar values. Thus coatings containing PCMs store heat in a latent form maintaining constant surface temperatures and discharge with time delay. PCM doped cool colored coatings have the potential to enhance thermal inertia and achieve important energy savings in buildings maintaining a thermally comfortable indoor environment, while fighting urban heat island when applied on external surfaces.
机译:在这项研究中,研究了有机PCM作为潜热存储材料的性能,将其掺入建筑和城市织物的涂料中时的性能。制备了六种颜色的三十六种涂料,其中含有不同数量的不同熔点的PCM。因此,制备具有相同粘合剂体系和相同颜色的红外反射(冷)涂料和普通涂料,以进行比较热评估。将样品分为六组,每组分别具有不同的颜色和八个样品:三种不同熔化温度(18℃,24℃,28℃)的PCM涂层,两种不同的PCM浓度(20%w / w,30%w / w),红外反射和匹配颜色的普通涂层。在2008年8月的24小时内记录了样品的表面温度。结果表明,所有PCM涂层的表面温度均低于红外反射涂层和普通涂层。对每日温度差的分析表明,从早上7点到上午10点,PCM和普通或冷涂层之间会出现峰值温度差。研究温度梯度表明,在这段时间内,PCM涂层的值低于红外反射和普通涂层。从上午10点至下午12点,所有涂层的温度梯度具有相似的值。因此,含有PCM的涂料以潜在形式存储热量,从而保持恒定的表面温度并随时间延迟放电。 PCM掺杂的冷彩色涂料具有增强热惯性并在保持热舒适的室内环境的建筑物中实现重要节能的潜力,同时在外表面上使用时可抵御城市的热岛。

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  • 来源
    《Building and Environment》 |2011年第3期|p.570-576|共7页
  • 作者单位

    Croup Building Environmental Studies, National and Kapodistrian University of Athens, Section of Applied Physics, Physics Department, Building ofPhysics-5, University Campus, 157 84 Athens, Greece;

    Croup Building Environmental Studies, National and Kapodistrian University of Athens, Section of Applied Physics, Physics Department, Building ofPhysics-5, University Campus, 157 84 Athens, Greece;

    Croup Building Environmental Studies, National and Kapodistrian University of Athens, Section of Applied Physics, Physics Department, Building ofPhysics-5, University Campus, 157 84 Athens, Greece;

    Croup Building Environmental Studies, National and Kapodistrian University of Athens, Section of Applied Physics, Physics Department, Building ofPhysics-5, University Campus, 157 84 Athens, Greece;

    Croup Building Environmental Studies, National and Kapodistrian University of Athens, Section of Applied Physics, Physics Department, Building ofPhysics-5, University Campus, 157 84 Athens, Greece;

    Colors Chemical Industry, Athens, Greece;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    urban heat island; phase change material; latent heat storage; pcm doped cool colored coatings;

    机译:城市热岛;相变材料潜热存储pcm掺杂的冷色涂料;

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