Experimental and numerical simulation study on hygrothermal migration of damaged envelope walls during wind-driven rain

Yu, Shui; Liu, Xueyan; Li, Yinzong; Shen, He; Yao, Yufeng; Sun, Song

doi:10.1016/j.buildenv.2023.110653

Cited by 3 publications

(1 citation statement)

References 38 publications

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“…In the absence of wind-driven rain, the same assumption holds true for the outer boundary surface. However, when wind-driven rain is present, it can lead to rainwater accumulation on the exterior wall, ultimately resulting in surface saturation [76,95,96].…”

Section: Boundary Conditionmentioning

confidence: 99%

A Review on Numerical Modeling of the Hygrothermal Behavior of Building Envelopes Incorporating Phase Change Materials

Sawadogo,

Godin,

Duquesne

et al. 2023

Buildings

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Buildings are submitted to various external and internal solicitations that could affect its energy performance. Among these solicitations, temperature and moisture play a crucial role and could irrevocably affect the comfort of the occupants and the indoor air quality of the living environment. To assess the impact of the solicitation on building performance, a precise modeling of the heat, air, and moisture transfer phenomenon is necessary. This work proposes an extensive review of the hygrothermal models for building envelopes. The different models are divided into nodal and HAM techniques for heat, air, and moisture (HAM) transfer models. The HAM approach has been classified based on four driving potentials: moisture content, relative humidity, capillary pressure, and vapor pressure. Phase change materials (PCMs), alongside hygroscopic materials, enhance building thermal capacity and energy efficiency. There are various approaches to studying phase changes, with enthalpy-based and heat capacity approaches being the most popular. Building performance can be improved by combining PCM thermal inertia with hygroscopic moisture management. This review has exhibited the need for numerical models that address phase change and moisture behavior in these hybrid materials, capable of controlling temperature and humidity.

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Section: Boundary Conditionmentioning

confidence: 99%

A Review on Numerical Modeling of the Hygrothermal Behavior of Building Envelopes Incorporating Phase Change Materials

Sawadogo,

Godin,

Duquesne

et al. 2023

Buildings

View full text Add to dashboard Cite

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Simultaneous estimation of hygrothermal properties of a prefabricated lightweight wall using one-year on-site measurements to solve inverse problems

Pinheiro Ramos,

Delgadillo Buenrostro,

Metrevelle Marcondes de Lima e Silva

et al. 2024

Building and Environment

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A Comprehensive Approach to Facade Design for Preventing Rainwater Penetration: Implementation in Spanish Regions

Pérez-Bella,

Domínguez-Hernández,

Orna-Carmona

et al. 2024

Buildings

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Rainwater penetration into building facades results in multiple issues, including material and structural degradation, reduced energy efficiency, and health-related concerns among occupants. Currently, the watertightness performance of building facades is assessed based on standardized tests, which simulate generic water supplies and pressure differentials that do not reflect the specific exposure conditions of each facade. Consequently, practitioners’ decisions regarding facade design often rely on qualitative and imprecise criteria that do not align with the actual climatic loads. In this article, a comprehensive approach to facade design for preventing rainwater penetration is described, incorporating specific methodological refinements for reliable and practical implementation across various Spanish regions. In this approach, the parameters surpassed during any watertightness test (defined by the magnitude and duration of the water supplies and pressure differentials) are correlated with the recurrence of equivalent climatic exposures at the facade (determined by the climatic conditions of the site, facade height, and surrounding environment), thereby quantitatively characterizing the facade watertightness performance. The findings used to refine this method for implementation in Spain are illustrated and validated using selected case studies, and a comprehensive database is provided to enable its application at 360 locations distributed across various regions of the country.

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Experimental and numerical simulation study on hygrothermal migration of damaged envelope walls during wind-driven rain

Cited by 3 publications

References 38 publications

A Review on Numerical Modeling of the Hygrothermal Behavior of Building Envelopes Incorporating Phase Change Materials

A Review on Numerical Modeling of the Hygrothermal Behavior of Building Envelopes Incorporating Phase Change Materials

Simultaneous estimation of hygrothermal properties of a prefabricated lightweight wall using one-year on-site measurements to solve inverse problems

A Comprehensive Approach to Facade Design for Preventing Rainwater Penetration: Implementation in Spanish Regions

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