Material characterization and hygrothermal performance of breathable and vapour tight polyisocyanurate insulation

建筑物在能源消耗和温室气体排放方面对环境有重大影响。加拿大联邦政府致力于到2020年将温室气体排放量在2005年水平上减少17%。为了实现这些雄心勃勃的目标，当前的建筑设计和运营实践 ** 必须改变，高性能建筑必须采用创新的材料、设计和技术。通过显著减少建筑围护结构热损失，有助于实现净零能耗建筑的创新技术之一是将聚异氰脲酸酯绝缘护套作为外部绝缘材料。虽然这种隔热材料的热性能是众所周知的，但 ** 耐湿性性能需要进一步研究。拟议的研究项目旨在 ** 表征IKO的 ** 透气和气密聚异氰脲酸酯绝缘护套的湿热性能，并进行长期耐久性性能研究，作为外部建筑围护结构组件，在 ** 不同的气候和施工实践下。将使用建筑科学卓越中心湿热性能测量 ** 实验室（HPML）提供的专用设施，测量 **IKO Enner-Air（透气聚异氰脲酸酯绝缘护套）在不同温度和相对 ** 湿度下的热湿传输和储存性能。将使用先进的湿热模型HAMFit研究IKO的两种 ** 类型的聚异氰脲酸酯绝缘材料（透气和双面箔）在两个不同气候 ** 区（温和和寒冷）的湿热性能。除了 ** 室内和室外边界条件外，还将研究接缝对透气性和箔面 ** 聚异氰脲酸酯（一种常见的施工实践）对系统湿热性能的影响。在研究中，将考虑不同厚度、覆层材料和内部饰面的各种墙壁设计。基于对模拟结果和实测材料性能 ** 数据的分析，将建立并报告新材料的最佳建筑围护结构设计。

Buildings have a significant impact on the environment both in energy consumption and greenhouse gas**emissions. The Canadian federal government is committed to reducing greenhouse gas emissions by 17% by**2020 from the 2005 levels. To achieve these ambitious targets current building design and operation practices**must change and high-performance buildings must incorporate innovative materials, designs and technologies.**One of the innovative technologies that can be instrumental in achieving net-zero energy building through**significant reduction of building envelope heat loss is implementing polyisocyanurate insulation sheathing as**an exterior insulation. Although the thermal performance of this insulation material is well known, the**moisture durability performance needs to be investigated further. The proposed research project aims to**characterize the hygrothermal properties and conduct a long-term durability performance study of IKO's**breathable and airtight polyisocyanurate insulation sheathing, as an exterior building envelope assembly, under**different climates and construction practices. The thermal and moisture transport and storage properties of the**IKO Enner-Air (breathable polyisocyanurate insulation sheathing) at different temperature and relative**humidity will be measured using the specialized facilities available at the Hygrothermal Property Measurement**Laboratory (HPML) at the Building Science Centre of Excellence. The hygrothermal performance of the two**types of IKO's polyisocyanurate insulation materials (breathable and double foil faced) in two different climate**zones, mild and cold, will be investigated using an advanced hygrothermal model, HAMFit. In addition to the**indoor and outdoor boundary conditions, the impact of a seam on both breathable and the foil-faced**polyisocyanurate, a common construction practice, on the hygrothermal performance of the system will also be**investigated. In the study, various wall designs with different thicknesses, cladding materials and interior**finishes will be considered. Based on analysis of the simulation results and the measured material property**data, the optimal building envelope design for the new material will be established and reported.