Evaluation of the performance of different internal insulation systems in real-life conditions ‐ A case study

IF 7.1 1区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Panagiota Pagoni , Eva Birgit Møller , Ruut Hannele Peuhkuri , Nickolaj Feldt Jensen
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Abstract

Thermal retrofitting of historic buildings is essential to reducing heat loss in all buildings. Although exterior insulation often is hygrothermally a better solution, internal insulation is the only option in facades worthy of preservation (e.g., solid masonry external walls). However, mold growth has frequently been discovered in buildings with internal insulation at the interface between the insulation and the original wall, while simulations and lab tests show minimum risk, and vice versa. Therefore, real-life testing is required so that the building owners are more likely to accept these measures.
This paper presents a case study of an 1837-built typical historic building. The study focuses on the building's top floor, a residential area (commune). Eight different rooms have four different types of internal insulation installed. The performance of the insulation systems was determined by monitoring the interior and exterior climate and the temperature and relative humidity at the intersection of the insulation and the existing wall for 20 months. The risk of mold growth was estimated based on the measurements. In the wall interfaces, the Mold Index indicated that the risk for mold growth is not severe. Hygrothermal simulations for the measured period and ten years were also performed. To increase simulation accuracy, the original exterior masonry bricks underwent laboratory testing to determine their precise material properties. The main outcome from the simulations was that the three vapor-open systems were more susceptible to indoor moisture load changes and had an elevated risk of mold growth, whereas the vapor-tight system was more robust to variation in insulation thickness and internal moisture level changes, and in this case, demonstrated the best performance in respect to moisture safety.
评估不同内部隔热系统在实际条件下的性能 - 案例研究
历史建筑的保温改造对于减少所有建筑的热损失至关重要。虽然外墙隔热通常是一种更好的湿热解决方案,但对于值得保护的外墙(如实心砌体外墙)来说,内墙隔热是唯一的选择。然而,在采用内保温层的建筑中,经常会在保温层与原墙的交接处发现霉菌生长,而模拟和实验室测试显示风险最小,反之亦然。因此,需要进行实际测试,这样建筑物业主才更有可能接受这些措施。本文介绍了对一栋建于 1837 年的典型历史建筑的案例研究。研究重点是该建筑的顶层,即住宅区(公社)。八个不同的房间安装了四种不同类型的内部隔热材料。隔热系统的性能是通过对室内外气候以及隔热层与现有墙壁交接处的温度和相对湿度进行 20 个月的监测来确定的。根据测量结果估算霉菌生长的风险。墙体交接处的霉菌指数表明,霉菌生长的风险并不严重。此外,还进行了测量期间和十年的湿热模拟。为了提高模拟的准确性,对原有的外墙砌砖进行了实验室测试,以确定其精确的材料特性。模拟的主要结果是,三种蒸汽开放式系统更容易受到室内湿度负荷变化的影响,霉菌生长的风险也更高,而蒸汽密闭式系统对隔热层厚度变化和内部湿度变化的抵抗力更强,在这种情况下,在防潮安全方面表现最佳。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Building and Environment
Building and Environment 工程技术-工程:环境
CiteScore
12.50
自引率
23.00%
发文量
1130
审稿时长
27 days
期刊介绍: Building and Environment, an international journal, is dedicated to publishing original research papers, comprehensive review articles, editorials, and short communications in the fields of building science, urban physics, and human interaction with the indoor and outdoor built environment. The journal emphasizes innovative technologies and knowledge verified through measurement and analysis. It covers environmental performance across various spatial scales, from cities and communities to buildings and systems, fostering collaborative, multi-disciplinary research with broader significance.
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