Development of a Digital Workflow for Improving Hygrothermal Modelling of Heritage Structures

保护我们现有的建筑存量正在成为加拿大建筑和工程实践的一个更重要的部分。遗产砖石建筑无论是石头或砖，已被证明有beendurable在加拿大的气候生存超过100年或更长时间。这些墙的一个弱点是，与现代规范标准相比，它们被认为具有较差的能源性能。在考虑热舒适性和降低能耗的需求时，通常会考虑在改造/修复方案中沿墙壁的内表面沿着安装隔热材料。已知这对墙体的耐久性有负面影响，使其暴露在更冷、更湿的间隙条件下，并容易发生冻融和其他与水分相关的损坏[1]。接下来的问题是：在潮湿损坏的风险变得不可接受之前，砌体墙能推多远？你如何量化或确定这种风险？行业的问题是开发一个工作流程，有效地结合湿热和能量建模软件来分析墙体组件的湿热性能;同时考虑机械系统和内部条件作为一个系统的同时影响。这项工作将有助于了解目前的基线条件的墙壁，并帮助指导和证明他们的设计proposals.The潜在的挑战是开发一个混合工作流程的湿热和能源建模的遗产结构，有效地利用软件程序，如WUFI和EnergyPlus的功能。对于遗产结构，在理解和程序工作流程方面存在需要解决的具体差距。这种新的工作流程旨在建立在以前开发的工作流程的分析ofhygrothermal性能的墙壁隔离，并添加到它的考虑系统水平的变化，如机械系统，这将影响室内条件。

Conservation of our existing building stock is becoming a more significant portion of architecture andengineering practice in Canada. Heritage masonry buildings whether stone or brick, have proven to have beendurable in Canadian climates surviving over 100 years or more. A weak point of these walls is that they areconsidered to have poor energy performance compared to modern code standards. When considering thermalcomfort and the desire to reduce energy consumption, there is often consideration to installing thermalinsulation along interior face of walls during a retrofit/rehabilitation scenario. This is known to have a negativeeffect on the durability of the wall leaving exposed to colder and wetter interstitial conditions and prone tofreeze-thaw and other moisture-related damages [1]. The questions that follow are; how far can a masonry wallbe pushed before the risk of moisture damage becomes unacceptable? And how do you quantify or determinethis risk?The industry problem is to develop a workflow which effectively combines hygrothermal and energy modellingsoftware to analyze the hygrothermal performance of wall assemblies; while at the same time includingconsideration of the simultaneous effects of mechanical systems and interior conditions as a system. This workwill help with the understanding of the current baseline condition of the walls; and help guide and justify theirdesign proposals.The underlying challenge is to develop a hybrid workflow for hygrothermal and energy modelling of heritagestructures which effectively utilizes the capabilities of software programs such as WUFI and EnergyPlus. Forheritage structures, there are specific gaps in understanding and procedural workflow which need to beaddressed. This new workflow seeks to build off of previously developed workflows for the analysis ofhygrothermal performance of walls in isolation, and add to it consideration of system level changes such asmechanical systems which will affect interior conditions.