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A new test method to determine the relative drying capacity of building envelope panels of various configurations

机译：一种新的测试方法，可以确定各种配置的建筑围护板的相对干燥能力

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摘要

In the context of a collaborative research project with industry and government, a two-story test hut, consisting of thirty-one 2438 mm (8 ft) high and 762 mm (21/2 ft) wide wall assemblies and installed with 25 gravimetric samples in each assembly to monitor the moisture content change, was designed and erected within a large-scale test chamber to investigate the drying capacity of different envelope configurations. The test was performed under steady-state climatic loadings representing wet seasons. Uniform moisture loading was achieved by the use of water trays on load cells placed on the bottom plate within the stud cavities of the wall assemblies. This method submits the different wall configurations to wetting by evaporation and drying by evacuating moisture out of the stud cavity. In search for an indicator or yardstick of the relative drying capacity of different wall configurations, a new calculation method by mapping was developed. The method estimates the amounts of moisture absorbed by components surrounding the stud cavity. The moisture transported out of the cavity is the difference between the total water evaporated from the tray and the water absorbed by the wall components. The ratio between the water evaporated and the vapor evacuated is an indicator of the drying capacity of a given wall configuration in relation to others subjected to a predetermined set of conditions.
机译：在与行业和政府的合作研究项目的背景下，一个两层楼的测试小屋由31个高2438毫米（8英尺）和762毫米（21/2英尺）的壁组件组成，并安装了25个重量分析样品在每个组件中监测水分含量的变化，被设计并架设在一个大型测试室内，以研究不同信封结构的干燥能力。该测试是在代表潮湿季节的稳态气候负荷下进行的。通过在壁组件双头螺栓孔内的底板上放置的称重传感器上使用水盘，可实现均匀的水分装载。该方法通过蒸发将湿气从壁钉腔中抽出而使不同的壁构造通过蒸发润湿和干燥。为了寻找不同墙面配置的相对干燥能力的指标或标准，开发了一种通过映射的新计算方法。该方法估算了螺柱腔周围组件吸收的水分量。从腔中运出的水分是从托盘蒸发的总水与壁组件吸收的水之间的差。蒸发的水与排出的蒸气之间的比率是给定壁构造相对于经受预定条件的其他构造的干燥能力的指标。

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