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首页> 外文会议>International symposium on heating, ventilating and air conditioning >TRENDS IN PHYSICS OF BUILDING ENCLOSURES: INTEGRATION OF TESTING AND MODELLING FOR A REAL TIME HYGROTHERMAL PERFORMANCE ANALYSIS
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TRENDS IN PHYSICS OF BUILDING ENCLOSURES: INTEGRATION OF TESTING AND MODELLING FOR A REAL TIME HYGROTHERMAL PERFORMANCE ANALYSIS

机译：建筑围护结构的趋势：实时热工性能分析的测试和建模集成

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In contrast to the structural engineering where time-dependent variables are infrequent, most of environmental concerns involve heat, air and moisture transports and requires hourly input of climatic data into the computerized model of calculations. Therefore, to determine hygrothermal performance of building envelope under given climate and service conditions one needs to use advanced hygrothermal (HT, also called HAM) model with input of hourly weather data and material characteristics expressed as a function of the material’s moisture content. While we are in the middle of developing an integrated testing and modelling approach for heat transfer though a moist material, engineering problems related to thermal upgrade of the existing buildings forces us to expand the models to include air flows into such modelling. Air flows, particularly those cause by wind pressure, may have significant effect on energy but small effect on moisture balance in the enclosure if the air flow path is short (nearly across the wall) but those related to convective movement of air can displace large amounts of moisture and create mold or durability problems. The testing needed for model verification must now include assessment of air flow path and methodology for field testing. The next step in the project complexity is introduced by coupling of the flows in the air cavity with HVAC devices to create ventilated, thermal upgrade system. To overcome some of these difficulties 8 research institutes from five counties are starting a collaborative research program.
机译：与不经常发生随时间变化的变量的结构工程相反，大多数环境问题涉及热量，空气和水分的传输，并且需要每小时将气候数据输入到计算机化的计算模型中。因此，要确定建筑围护结构在给定的气候和服务条件下的湿热性能，需要使用高级湿热（HT，也称为HAM）模型，并输入每小时天气数据和材料特性（取决于材料的水分含量）。虽然我们正在开发一种综合测试和建模方法，以通过潮湿的材料进行传热，但与现有建筑物的热升级有关的工程问题迫使我们扩展模型，以将空气流包括在这种建模中。如果空气流路径短（几乎穿过墙壁），则空气流（尤其是由风压引起的空气流）可能会对能量产生重大影响，但对机壳中的水分平衡影响很小，但是与空气对流运动有关的空气流可能会大量移动水分并造成霉菌或耐久性问题。模型验证所需的测试现在必须包括气流路径的评估和现场测试的方法。通过将空气腔中的气流与HVAC设备耦合以创建通风的热力升级系统，可以引入项目复杂性的下一步。为了克服其中的一些困难，来自五个县的8个研究机构正在启动一项合作研究计划。

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