Hygrothermal simulations of thermally insulated basement envelopes - Importance of boundary conditions below grade
| Autor: | Tore Kvande, Silje Kathrin Asphaug, Berit Time |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Moisture content
Environmental Engineering Geography Planning and Development 0211 other engineering and technologies 02 engineering and technology Soil surface Boundary condition 010501 environmental sciences Numerical method 01 natural sciences Teknologi: 500 [VDP] Structure below grade Geotechnical engineering 021108 energy Boundary value problem Moisture damage 0105 earth and related environmental sciences Civil and Structural Engineering Hygrothermal performance Moisture Building and Construction Durability Basement Environmental science Moisture Damage Efficient energy use |
| Zdroj: | Building and Environment |
| Popis: | Hygrothermal simulations are widely used to predict and optimise the hygrothermal performances of building envelopes. For the walls and floors in basements, however, determining the variation of the exterior hygrothermal boundary conditions below grade are challenging due to the various and complex heat and moisture loads and the large area needed to simulate the surrounding ground. A scoping literature review is conducted to provide an overview of current state-of-the-art methods for the addressing of these boundaries. Ten of the most comprehensive studies are selected and scrutinised. The review shows that there is a lack of thorough validation for hygrothermal simulations of basements using full-scale physical measurements. The most valuable experiences from studies with somewhat different perspectives are identified. Key uncertainties include the soil's varying composition and moisture content, liquid uptake at the soil surface and transfer of precipitation, and computational costs. Finally, the review highlights the need for a recognised method/procedure to determine the exterior boundary conditions for hygrothermal simulations of basement envelopes, which can account for the varying influencing factors of the ground. Not only can a better understanding and prediction of heat and moisture performance of basement envelopes contribute to improving building durability and energy efficiency; it can also potentially result in significant economic savings, as expensive repairs below grade can be avoided or delayed. This is an open access article distributed under the terms of the Creative Commons CC-BY license, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
| Databáze: | OpenAIRE |
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