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Development Of Ham Tool For Building Envelope Analysis

机译：用于建筑围护分析的火腿工具的开发

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摘要

Moisture-related building envelope failures have resulted in costly rehabilitation in various regions of North America. To advance building envelope design towards an engineering approach and reduce the occurrence of future failures, an advanced numerical tool was developed, in conjunction with an extensive full-scale experiment, to investigate hygrothermal performance of various wood-frame wall assemblies. Major features of the tool are multi-dimensional and transient coupling of heat and moisture transport; natural air convection integrated in hygrothermal simulation through Darcy-Boussinesq approximation; heat transfer by conduction and convection of sensible and latent heat; moisture transport by vapor diffusion, capillary suction and convection; material database of common building materials in North America; experimental settings or weather data as boundary conditions; and moisture added in the building envelope to simulate the wetting process. The numerical tool achieves good compliances to the benchmarking cases of the HAMSTAD project, and its predictions have shown good agreement with data from the full-scale wall experiment. The numerical tool employs the commercial finite-element software to solve the governing equations. This approach provides building science researchers the flexibility to modify, maintain and share their modeling work efficiently.
机译：与湿气有关的建筑物围护结构故障导致在北美各个地区进行昂贵的修复工作。为了将建筑围护结构设计推向工程方法并减少将来发生故障的可能性，开发了一种先进的数值工具，并进行了广泛的全面试验，以研究各种木结构墙组件的湿热性能。该工具的主要特征是热量和水分传输的多维和瞬态耦合。通过Darcy-Boussinesq逼近将自然空气对流集成到湿热模拟中；通过显热和潜热的传导和对流进行热传递；通过蒸汽扩散，毛细管抽吸和对流进行水分传输；北美常见建筑材料的材料数据库；实验设置或天气数据作为边界条件；并在建筑物围护结构中添加水分以模拟润湿过程。数值工具可以很好地符合HAMSTAD项目的基准测试情况，其预测结果与墙体全尺寸试验的数据具有很好的一致性。数值工具使用商业有限元软件来求解控制方程。这种方法使建筑科学研究人员可以灵活地高效修改，维护和共享其建模工作。

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