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Novel MOF-based autonomous humidity control materials for energy-efficient indoor moisture regulation

Qin, Menghao LU ; Rasmussen, Oliver S. ; Chen, Jun and Wadsö, Lars LU (2024) In Building and Environment 261.
Abstract

The concept of autonomous humidity control material (AHCM) is inspired by phase change material. AHCM is a new type of functional sorbent material. It can adsorb/release sufficient water vapor at the target relative humidity level and autonomously maintain the indoor relative humidity at a set value/range without external intervention, which cannot be achieved by conventional sorbents (e.g., zeolite, silica gel, etc.). In this study, a novel metal-organic framework (MOF) based AHCM is prepared, and its application for energy-efficient indoor moisture control has been investigated. The new MOF-AHCM has an S-shaped water vapor isotherm, large porosity, and high moisture adsorption capacity. The trigger points for adsorption and desorption... (More)

The concept of autonomous humidity control material (AHCM) is inspired by phase change material. AHCM is a new type of functional sorbent material. It can adsorb/release sufficient water vapor at the target relative humidity level and autonomously maintain the indoor relative humidity at a set value/range without external intervention, which cannot be achieved by conventional sorbents (e.g., zeolite, silica gel, etc.). In this study, a novel metal-organic framework (MOF) based AHCM is prepared, and its application for energy-efficient indoor moisture control has been investigated. The new MOF-AHCM has an S-shaped water vapor isotherm, large porosity, and high moisture adsorption capacity. The trigger points for adsorption and desorption occur at 60 % and 40 % RH, respectively. It means MOF-AHCM can autonomously regulate the indoor relative humidity to fall within 40%–60 % RH, which fits the thermal comfort range recommended by ASHRAE well. The physicochemical and hygrothermal characteristics of the synthesized MOF-ACHM have been assessed. Full-scale chamber tests were carried out to verify the humidity control ability of the new material. The experimental results show that MOF-AHCM can significantly mitigate indoor humidity fluctuation and regulate the humidity level within the target range autonomously. Furthermore, numerical simulation has been performed to investigate the impact of MOF-AHCM on building energy consumption in different moisture regions globally, namely, arid, semiarid, dry, moist, and wet areas. The results reveal that MOF-AHCM has an excellent humidity control capacity and can reduce the latent cooling demand of HVAC systems in most climates, especially in arid, semiarid, dry, and moist areas.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Autonomous humidity control material, Building energy saving, Metal-organic framework, Moisture control
in
Building and Environment
volume
261
article number
111757
publisher
Elsevier
external identifiers
  • scopus:85196552636
ISSN
0360-1323
DOI
10.1016/j.buildenv.2024.111757
language
English
LU publication?
yes
id
e7ebffba-43c7-4dd5-abed-c1e277640872
date added to LUP
2024-07-05 14:05:46
date last changed
2024-07-05 14:06:40
@article{e7ebffba-43c7-4dd5-abed-c1e277640872,
  abstract     = {{<p>The concept of autonomous humidity control material (AHCM) is inspired by phase change material. AHCM is a new type of functional sorbent material. It can adsorb/release sufficient water vapor at the target relative humidity level and autonomously maintain the indoor relative humidity at a set value/range without external intervention, which cannot be achieved by conventional sorbents (e.g., zeolite, silica gel, etc.). In this study, a novel metal-organic framework (MOF) based AHCM is prepared, and its application for energy-efficient indoor moisture control has been investigated. The new MOF-AHCM has an S-shaped water vapor isotherm, large porosity, and high moisture adsorption capacity. The trigger points for adsorption and desorption occur at 60 % and 40 % RH, respectively. It means MOF-AHCM can autonomously regulate the indoor relative humidity to fall within 40%–60 % RH, which fits the thermal comfort range recommended by ASHRAE well. The physicochemical and hygrothermal characteristics of the synthesized MOF-ACHM have been assessed. Full-scale chamber tests were carried out to verify the humidity control ability of the new material. The experimental results show that MOF-AHCM can significantly mitigate indoor humidity fluctuation and regulate the humidity level within the target range autonomously. Furthermore, numerical simulation has been performed to investigate the impact of MOF-AHCM on building energy consumption in different moisture regions globally, namely, arid, semiarid, dry, moist, and wet areas. The results reveal that MOF-AHCM has an excellent humidity control capacity and can reduce the latent cooling demand of HVAC systems in most climates, especially in arid, semiarid, dry, and moist areas.</p>}},
  author       = {{Qin, Menghao and Rasmussen, Oliver S. and Chen, Jun and Wadsö, Lars}},
  issn         = {{0360-1323}},
  keywords     = {{Autonomous humidity control material; Building energy saving; Metal-organic framework; Moisture control}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Building and Environment}},
  title        = {{Novel MOF-based autonomous humidity control materials for energy-efficient indoor moisture regulation}},
  url          = {{http://dx.doi.org/10.1016/j.buildenv.2024.111757}},
  doi          = {{10.1016/j.buildenv.2024.111757}},
  volume       = {{261}},
  year         = {{2024}},
}