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首页> 外文期刊>International journal of green energy >METHOD TO DIAGNOSE WINDOW FAILURES AND MEASURE U-FACTORS ON SITE
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METHOD TO DIAGNOSE WINDOW FAILURES AND MEASURE U-FACTORS ON SITE

机译：诊断窗口故障和测量现场U因子的方法

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摘要

Windows are an essential part of buildings due to the requirement for natural light, views, and fresh air. However, windows are thermally the weakest bridge in a building due to their high thermal conductivity. Therefore, window U-factor (thermal transmittance) information is indispensable in calculating the overall energy load of a building. V-factors of windows, however, are difficult to obtain on-site because the label mounted on a window exhibiting its U-factor is typically removed after its installation. Further, it is almost impossible to detect any of a variety of window failures, such as the loss of insulating gases, leaky or cracked windows, and localized air leakage, simply by visual inspection. In this study, a novel technique to measure window U-factor in the field by measuring four temperatures (interior and exterior air temperatures, and interior and exterior window surface temperatures) is presented. Experimental and field tests on various types of full-scale windows have been performed to obtain their field-measured U-factors. Experimental results show that the field-measured U-factors match within 8% of the rated U-factors of the windows. Several assemblies combining storm windows with single- or double-pane windows were tested and the combined U-factors of the assemblies were measured and the readings were compared with the U-factors estimated by ASHRAE. In another test, argon from a double-pane window was removed deliberately and results confirmed the leakage using the proposed method. In addition, field tests at five different buildings were performed and the comparison between measured and rated (or estimated) U-factors is presented.
机译：由于需要自然采光，景观和新鲜空气，窗户是建筑物的重要组成部分。但是，由于窗户的高导热性，窗户在建筑上是最薄弱的桥梁。因此，在计算建筑物的总能量负荷时，窗户U因数（热透射率）信息是必不可少的。但是，窗户的V因子很难在现场获得，因为安装在窗户上的具有U因子的标签通常在安装后会被移除。此外，仅通过肉眼检查几乎不可能检测到各种窗户故障中的任何一个，例如绝缘气体的损失，窗户漏气或破裂，以及局部漏气。在这项研究中，提出了一种通过测量四个温度（室内和室外空气温度以及室内和室外窗户表面温度）来测量野外窗户U因子的新技术。已经对各种类型的全尺寸窗口进行了实验和现场测试，以获取其现场测量的U因子。实验结果表明，现场测量的U因子与窗户的额定U因子相匹配8％。测试了几个将防风窗与单窗格窗或双窗格窗组合的组件，并测量了这些组件的组合U因子，并将读数与ASHRAE估算的U因子进行了比较。在另一项测试中，有意地从双窗格窗口中去除了氩气，结果使用所提出的方法证实了泄漏。此外，还对五座不同建筑物进行了现场测试，并比较了测量的和额定的（或估计的）U因子。

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