A comprehensive experimental approach for the validation of quantitative infrared thermography in the evaluation of building thermal transmittance
A comprehensive experimental approach for the validation of quantitative infrared thermography in the evaluation of building thermal transmittance
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DOI：
10.1016/j.apenergy.2014.12.035
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发表时间：
2015-03-01
期刊：
影响因子：
11.2
通讯作者：
Chiogna, Michela
中科院分区：
文献类型：
--
作者：
Albatici, Rossano;Tonelli, Arnaldo M.;Chiogna, Michela
定量热成像是目前公认的一种可靠的方法来测量现有建筑的能源性能，特别是不透明元件的热透射率U值。在这一领域已经进行了一些研究，每一个提出了一个不同的程序，通过简单的案例研究的应用程序进行验证。无论如何，一个全面的方法，基于不同类型和暴露的墙壁的参数分析，但相同的边界条件，仍然是缺失的。这项研究提出了一个系统的方法来解决这个问题，基于三年的研究活动进行的实验建筑，木材（轻）和砖（重）结构进行了测试，同时与红外热成像技术（ITT），也配备了热流计（HFM）传感器和附近的气象站。给出了用ITT测量的U值的标准偏差以及与根据国际标准计算的值和用HFM方法测量的值的绝对偏差。与预期U值相比，对实现良好结果具有高度显著性的参数通过敏感性分析进行评估。同时考虑了气象条件的影响，建立了一套可重复的方法。研究结果表明，该方法对重型建筑物具有良好的效果，而对轻型和超级隔热墙仍需进一步研究。(C)2014爱思唯尔有限公司版权所有。
Quantitative thermography is now mostly accepted as a reliable method to measure energy performance of existing buildings, in particular the thermal transmittance U-values of opaque elements. Some researches have been conducted in this field, each presenting a different procedure verified by the application on simple case studies. Anyway, a comprehensive approach, based on a parametric analysis of walls with different typologies and exposure, but same boundary conditions, is still missing. This study proposes a systematic approach to the problem, based on a three years research activity carried on an experimental building where timber (light) and brick (heavy) structures were tested simultaneously with Infrared Thermovision Technique (ITT), also equipped with heat flow meter (HFM) sensors and a nearby meteo station. Standard deviation of U-values measured with ITT is given as well as absolute deviation against values calculated following international standards and measured with HFM method. Parameters having high significance for the achievement of good results compared to the expected U-values are assessed through a sensitivity analysis. Influence of weather conditions during the survey are also considered and a repeatable procedure is finally set up. The findings presented in the study show that the method gives good results for heavy constructions, while further studies are still needed for light and super-insulated walls. (C) 2014 Elsevier Ltd. All rights reserved.