Abstract
Moisture buffering describes the use of materials with high water-vapour sorption capacity to provide humidity control
in interior spaces. Established models of the moisture dynamics of buffering are derived from conventional Fickian vapour-diffusion equations. We describe an alternative analysis using a Sharp-Front formulation. This yields a similar expression for the moisture effusivity, several consistent scalings and a new definition of the moisture penetration depth. Features of the model are compared with some published experimental data. A new sorption buffer index is a measurable experimental property that describes the water-vapour buffer strength of the material.
in interior spaces. Established models of the moisture dynamics of buffering are derived from conventional Fickian vapour-diffusion equations. We describe an alternative analysis using a Sharp-Front formulation. This yields a similar expression for the moisture effusivity, several consistent scalings and a new definition of the moisture penetration depth. Features of the model are compared with some published experimental data. A new sorption buffer index is a measurable experimental property that describes the water-vapour buffer strength of the material.
| Original language | English |
|---|---|
| Pages (from-to) | 78-81 |
| Number of pages | 4 |
| Journal | RILEM Technical Letters |
| Volume | 6 |
| DOIs | |
| Publication status | Published - 22 Jul 2021 |
Keywords
- moisture buffering
- moisture emissivity
- penetration depth
- sharp-front model
- sorption
- vapour permeability
- sorption buffer index