Abstract
<p class="first" id="d3082085e61">ASHRAE recommends that the appropriate indoor relative humidity range for a healthy and comfortable indoor environment is between 40% and 65% RH. In order to meet the requirement, the vapour-compression air-conditioning system is the most commonly used method for dehumidification. However, this approach is energy-consuming. In this paper, a novel precise humidity control material (PHCM) based on Metal-Organic Frameworks (MOFs) is synthesized. This material has an S-shape isotherm, high porosity, and very high water vapor uptake of 1.62 g/g at 80% RH. MOF-PHCM can autonomously control indoor relative humidity within the desired comfort range at room temperature. Hygrothermal properties of the new material are measured. Numerical simulations have been carried out to study the effect of MOF-PHCM on indoor hygrothermal conditions and building energy consumption in different climates. The results show that MOF-PHCM can effectively control indoor relative humidity fluctuations and reduce building energy consumption in most climates without any additional energy input.
Highlights
ASHRAE recommends that the appropriate indoor relative humidity range for a healthy and comfortable indoor environment is between 40% and 65% RH
The adsorption isotherm must have a steep rise around 65% RH, and the desorption isotherm must have a steep decrease around 40% RH; (2) High water vapor uptake within the operating vapour pressure window; (3) Low regeneration temperature and high reproducible cycling performance; (4) High hygrothermal stability, non-toxicity and noncorrosion
This paper aims to first develop a new Metal-Organic Frameworks (MOFs)-based precise humidity control material (PHCM) that can realize the autonomous control of indoor moisture, and study the performance of the new MOF-PHCM for the indoor moisture control in different climates
Summary
ASHRAE recommends that the appropriate indoor relative humidity range for a healthy and comfortable indoor environment is between 40% and 65% RH. Indoor relative humidity is an important parameter to determine indoor air quality, occupants’ thermal comfort and building energy consumption. The adsorption isotherm must have a steep rise around 65% RH, and the desorption isotherm must have a steep decrease around 40% RH (see Fig. 1); (2) High water vapor uptake within the operating vapour pressure window; (3) Low regeneration temperature and high reproducible cycling performance; (4) High hygrothermal stability, non-toxicity and noncorrosion.
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