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

建筑在能源消耗和温室气体排放方面都对环境产生了重大影响。加拿大联邦政府承诺到2020年将温室气体排放量在2005年的基础上减少17%。为了实现这些雄心勃勃的目标，目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**实现净零能源建筑的创新技术之一是实施多异氰尿酸酯绝缘护套作为**外部绝缘。虽然这种绝热材料的热性能是众所周知的，但**湿气耐久性能还需要进一步研究。拟议的研究项目旨在**表征其湿热性能，并在**不同的气候和施工实践下，对IKO的**透气性和密封性多异氰尿酸酯隔热护套作为建筑外部围护结构组件进行长期耐久性能研究。**Iko Enner-Air(透气性多异氰尿酸盐绝缘护套)在不同温度和相对**湿度下的热和水分传输和存储性能将使用位于建筑科学卓越中心的湿热性能测量实验室(HPML)提供的专门设施进行测量。使用先进的湿热模型HAMFit，将研究IKO的两种**类型的多异氰尿酸酯绝缘材料(透气式和双箔贴面)在温和和寒冷两种不同气候**区域的湿热性能。除了**室内和室外边界条件外，还将**调查接缝对透气性和箔面**多异氰尿酸酯的影响，这是一种常见的施工实践，对系统的湿热性能的影响。在这项研究中，将考虑具有不同厚度、覆层材料和内部**饰面的各种墙体设计。基于对模拟结果和实测材料性能**数据的分析，将建立并报告针对新材料的最优建筑围护结构设计。

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.