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Experimental testing of cool colored thin layer asphalt and estimation of its potential to improve the urban microclimate

机译：冷色薄层沥青的试验测试及其改善城市微气候的潜力估算

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摘要

Urban Heat Island refers to the temperature increase in urban areas compared to rural settings, exac-erbating the energy consumption of buildings for cooling. The use of highly reflective materials in buildings and urban structures reduces the absorbed solar radiation and contributes to mitigate heat island. This paper presents the results of a study aiming to measure and analyze the solar spectral properties and the thermal performance of 5 color thin layer asphalt samples in comparison to a sample of conventional black asphalt. Computational fluid dynamics (CFD) simulation is used for evaluating the thermal and energy impact of applying the samples in outdoor spaces (roads). The spectrophotometric measurements showed that the colored thin layer asphalt samples are characterized by higher values of solar reflectance compared to the conventional asphalt, which is mainly due to their high near infrared solar reflectance. From the statistical analysis of the surface temperatures it was found that all the colored thin layer asphalt samples demonstrate lower surface temperatures compared to conventional asphalt. The maximum temperature difference recorded was for the off-white sample and was equal to 12℃. The CFD simulation results show that surface and air temperatures are decreased when applying the color thin layer sample.
机译：城市热岛是指与农村地区相比，城市地区的温度升高，加剧了建筑物制冷的能耗。在建筑物和城市结构中使用高反射率的材料可减少吸收的太阳辐射并有助于减轻热岛效应。本文介绍了一项旨在测量和分析5种彩色薄层沥青样品与常规黑沥青样品相比的太阳光谱特性和热性能的研究结果。计算流体动力学（CFD）模拟用于评估在室外空间（道路）中施加样品的热和能量影响。分光光度法的测量结果表明，与常规沥青相比，彩色薄层沥青样品具有较高的太阳反射率值，这主要是由于它们的高近红外太阳反射率。从表面温度的统计分析发现，与常规沥青相比，所有有色薄层沥青样品均具有较低的表面温度。记录的最大温差为灰白色样品，等于12℃。 CFD仿真结果表明，当施加彩色薄层样品时，表面和空气温度会降低。

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  • 来源
    《Building and Environment》 |2011年第1期|p.38-44|共7页
  • 作者

    Afroditi Synnefa; Theoni Karlessi; Niki Gaitani; Mat Santamouris; D.N. Assimakopoulos; C. Papakatsikas;

  • 作者单位

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

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

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

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

    rnNational and Kapodistrian University of Athens, Department of Applied Physics, Physics Department, Building of Physics - 5, University, Campus 157 84 Athens, Greece;

    rnAktis SA. Odysseos 13, Thessaloniki 54629, Greece;

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

    cool paving materials; colored thin layer asphalt; solar reflectance; near infrared reflectance; thermal performance; heat island mitigation;

    机译：凉爽的铺路材料;有色薄层沥青;太阳反射率近红外反射率热性能缓解热岛;

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