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Inferring the thermal resistance and effective thermal mass of a wall using frequent temperature and heat flux measurements

机译：使用频繁的温度和热通量测量来推断墙的热阻和有效热质量

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摘要

Evaluating how much heat is lost through external walls is a key requirement for building energy simulators and is necessary for quality assurance and successful decision making in policy making and building design, construction and refurbishment. Heat loss can be estimated using the temperature differences between the inside and outside air and an estimate of the thermal transmittance (U-value) of the wall. Unfortunately the actual U-value may be different from those values obtained using assumptions about the materials, their properties and the structure of the wall after a cursory visual inspection. In-situ monitoring using thermometers and heat flux plates enables more accurate characterisation of the thermal properties of walls in their context. However, standard practices require that the measurements are carried out in winter over a two-week period to significantly reduce the dynamic effects of the wall's thermal mass from the data. A novel combination of a lumped thermal mass model, together with Bayesian statistical analysis is presented to derive estimates of the U-value and effective thermal mass. The method needs only a few days of measurements, provides an estimate of the effective thermal mass and could potentially be used in summer.
机译：评估通过外墙散失的热量是建筑能耗模拟器的一项关键要求，对于政策制定，建筑设计，建造和翻新中的质量保证和成功的决策而言，这是必不可少的。可以使用内部和外部空气之间的温差和壁的热传递率（U值）估算热损失。不幸的是，实际的U值可能与通过粗略的目视检查后关于材料，其属性和墙的结构的假设所获得的值不同。使用温度计和热通量板进行原位监控可以更准确地表征墙体的热特性。但是，标准做法要求在冬季进行为期两周的测量，以显着降低数据中墙体热质量的动态影响。提出了集总热质量模型与贝叶斯统计分析的新颖组合，以得出U值和有效热质量的估计值。该方法仅需几天的测量，即可估算出有效的热质量，并可能在夏季使用。

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  • 来源
    《Energy and Buildings》 |2014年第8期|10-16|共7页
  • 作者

    Phillip Biddulph; Virginia Gori; Clifford A. Elwell; Cameron Scott; Caroline Rye; Robert Lowe; Tadj Oreszczyn;

  • 作者单位

    UCL Energy Institute, 14 Upper Woburn Place, London WC1H 0NN, UK;

    UCL Energy Institute, 14 Upper Woburn Place, London WC1H 0NN, UK;

    UCL Energy Institute, 14 Upper Woburn Place, London WC1H 0NN, UK;

    Archimetrics Ltd seconded to the Complex Built Environment Systems Group (CBES), The Bartlett School of Graduate Studies, UCL, 14 Upper Wobum Place, London WC1H 0NN,UK;

    Archimetrics Ltd seconded to the Complex Built Environment Systems Group (CBES), The Bartlett School of Graduate Studies, UCL, 14 Upper Wobum Place, London WC1H 0NN,UK;

    UCL Energy Institute, 14 Upper Woburn Place, London WC1H 0NN, UK;

    UCL Energy Institute, 14 Upper Woburn Place, London WC1H 0NN, UK;

  • 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

    External wall; U-Value; R-value; Thermal Mass; Bayesian Statistics; Heat Transfer; In-situ Measurements;

    机译：外墙;U值;R值热质量;贝叶斯统计;传播热量;原位测量;

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