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首页> 外文期刊>Energy and Buildings >The evaluation of the thermal behaviour of a mortar based brick masonry wall coated with TiO_2 nanoparticles: An experimental assessment towards energy efficient buildings
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The evaluation of the thermal behaviour of a mortar based brick masonry wall coated with TiO_2 nanoparticles: An experimental assessment towards energy efficient buildings

机译：涂有TiO_2纳米颗粒的砂浆砖砌体墙的热性能评估：对节能建筑的实验评估

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摘要

The transfer of energy (in the form of heat) between the building and its surroundings affects its thermal performance. When a given building system is thermally inefficient it will require that the HVAC equipment will be in permanent activity, increasing the underlying energy costs. This work evaluates the influence of using a TiO_2-coated plastering mortar in the thermal performance of a building wall model. The TiO_2 aqueous solution was sprayed onto the mortar surface, in its fresh state, by using an atmospheric air compressor at a distance of about 20 cm, during 30 s and the speed of the aqueous solution jet set at 100mL/min, thus leading to a coverage rate of about 12mg/cm~2.For the first time, as far as the authors' knowledge, this research work allowed to test the previously speculated hypothesis and verify its feasibility in the building industry context. It has been observed that the application of a TiO_2-coated mortar worsens the thermal behaviour of the wall model, in 10% and 13% for the conduction thermal resistance and for thermal transmission coefficient, respectively. Furthermore, the deposition of TiO_2 nanoparticles on the exterior wall surface enhances the water evaporation rate in 136%.
机译：建筑物及其周围环境之间的能量（以热能形式）传递会影响其热性能。当给定的建筑系统热效率低下时，将要求HVAC设备处于永久活动状态，从而增加了潜在的能源成本。这项工作评估了使用TiO_2涂层的抹灰砂浆对建筑墙体模型的热性能的影响。在30秒钟内，通过使用大气压缩机以大约20 cm的距离将TiO_2水溶液以新鲜状态喷涂到砂浆表面上，持续30 s，并将水溶液喷射速度设定为100mL / min，从而据作者所知，这项研究工作首次证明了先前推测的假设，并验证了其在建筑行业环境中的可行性，首次覆盖率约为12mg / cm〜2。已经观察到，涂覆TiO_2的砂浆会使壁模型的热性能恶化，传导热阻和传热系数分别降低10％和13％。此外，TiO 2纳米颗粒在外壁表面上的沉积提高了136％的水蒸发速率。

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  • 来源
    《Energy and Buildings》 |2014年第10期|1-8|共8页
  • 作者

    Joaquim O. Carneiro; Graca Vasconcelos; Sofia Azevedo; Carlos Jesus; Carlos Palha; Nuno Gomes; Vasco Teixeira;

  • 作者单位

    Department of Physics, University of Minho, Azurem Campus, 4800-058 Guimaraes, Portugal;

    ISISE, Civil Engineering Department, University of Minho, Azurem Campus, 4800-058 Guimaraes, Portugal;

    Department of Physics, University of Minho, Azurem Campus, 4800-058 Guimaraes, Portugal;

    Civil Engineering Department, University of Minho, Azurem Campus, 4800-058 Guimaraes, Portugal;

    Civil Engineering Department, University of Minho, Azurem Campus, 4800-058 Guimaraes, Portugal;

    Civil Engineering Department, University of Minho, Azurem Campus, 4800-058 Guimaraes, Portugal;

    Department of Physics, University of Minho, Azurem Campus, 4800-058 Guimaraes, Portugal;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    TiO_2 nanoparticles; Coated mortar wall thermal behaviour; Energy efficient buildings;

    机译：TiO_2纳米粒子涂层砂浆墙的热性能;节能建筑;

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