A review of liquid desiccant air dehumidification: From system to material manipulations

Qi, Ronghui; Dong, Chuanshuai; Zhang, Lizhi

doi:10.1016/j.enbuild.2020.109897

Cited by 136 publications

(40 citation statements)

References 109 publications

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“…The test results show that when the outdoor temperature is 25~32 ℃ and the outdoor dew point is 23.24~25.72 ℃, the unit can achieve the air supply temperature of 3.2~4.0 ℃ and the dew point temperature of -1.25~-0.57 ℃. At present, there are few engineering applications of liquid desiccant dehumidification in low-humidity industries, which is related to the corrosiveness of liquid desiccant and the tendency to produce liquid droplets, leading to the research on liquid dehumidification mostly remaining in numerical simulation or laboratory-scale experiments [41,42] . But now these disadvantages can be eliminated by some means, so in the future liquid desiccant dehumidification is expected to be more widely used in low-humidity industries.…”

Section: Application Status Of Dehumidification Technology In Low-hum...mentioning

confidence: 99%

Current status and development trend of dehumidification technology in low-humidity industries

Yin

2022

IOP Conf. Ser.: Earth Environ. Sci.

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There are few studies on dehumidification of low-humidity industries which are closely related to production, especially emerging industries. In this paper, the dehumidification demands of low-humidity industries are investigated and analyzed, and the necessity of maintaining low humidity of each industry was emphasized. It introduces the common dehumidification technologies and their applicability in different applications, and on this basis summarizes the application scope division diagram of dehumidification system for low-humidity industries, which can be used as a reference for the initial scheme selection. In the future, the research direction of humidity control technology in low-humidity industries should focus on the development of new desiccant materials, the integration of multiple dehumidification technologies and the complementarity of their advantages and disadvantages, and the development of pilot projects to determine the potential for system transformation. Finally, the existing problems are introduced to ensure that the dehumidification work of the low-humidity industries can be carried out effectively in the future.

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Section: Application Status Of Dehumidification Technology In Low-hum...mentioning

confidence: 99%

Current status and development trend of dehumidification technology in low-humidity industries

Yin

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…Achieving the required thermal comfort in the building is essential for meeting the needs of occupants and the satisfaction level of indoor environmental quality. Although the greater emphasis is placed on achieving a satisfactory air temperature [64], it is equally important to achieve a satisfactory indoor humidity level, which consumes about 10-15% of the total energy consumed by the building [65]. Low or high levels of humidity in the building are associated with various sick building symptoms, bacteria, fungi, and virus risk.…”

Section: Comparison Of Scenariosmentioning

confidence: 99%

The Synergy of Living and Water Wall in Indoor Environment—Case Study in City of Brno, Czech Republic

et al. 2021

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The indoor environment that surrounds us and the elements in it affect not only our mood but also the air quality. Vegetation elements are currently more popular, especially for their aesthetic value but also because of the fact that they affect the physical parameters of the indoor environment such as temperature and humidity. Water elements are a similar example. The presented paper combines these two elements to achieve the best possible level of thermal comfort. Experimental verification of the influence of the living wall on air temperature and humidity took place during the heating season in the city of Brno in the space of the university, while three scenarios were created: the effect of the living wall in a semi-open space, an enclosed space, and a space with a water wall with regulated water temperature. The potential of the water wall is determined based on experimental verification in laboratory conditions. The results show that the synergy of the living and water wall in the indoor space may eliminate the risk of too-low humidity during the heating season.

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“…Liquid desiccant physiochemical properties, 20 membrane optimization, 21 absorber and regenerator improvement, and the control systems for LDACs performance enhancement 22 have been investigated in the literature. Fekadu et al, 23 Rongui et al, 24 and Chen et al 2 independently reviewed LDACs, which emphasized liquid desiccant materials and LDACs units improvement for energy optimization. These authors mainly investigated hybrid halide salt solutions for LDACs performance enhancement, while Chen et al 2 included ILs in their investigations.…”

Section: Introductionmentioning

confidence: 99%

Desiccant solutions, membrane technologies, and regeneration techniques in liquid desiccant air conditioning system

2021

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Liquid desiccant air dehumidification has gained substantial attention recently due to its attractive energy-saving capability, high moisture retention, and low regeneration temperature. However, there are still unresolved limitations in liquid desiccant air conditioning systems (LDACs). Among on-going studies are the search for greener desiccant solvents, high-performance membrane, and regeneration techniques hybridization. This review discusses up-to-date development of the performance influential components of LDACs, such as desiccant properties, regeneration techniques, membranes, energy sources, and hybrid system configurations. The corrosive nature of conventional halide salt solutions, non-biodegradability and high viscosity property of most ionic liquids necessitate the search for alternative solvents in LDACs. Deep eutectic solvents (DES) properties, such as non-corrosive, hygroscopic, biodegradable, and low viscosity idealize promising alternative desiccant solutions. Therefore, DES may be usefully explored and further investigated in LDACs to establish the degree of their capacities in replacing conventional desiccants. Non-thermal regeneration techniques and nanoparticle enhanced membranes were also found to improve the overall energy performance of the LDAC system. Nonthermal regeneration techniques can operate below 40 C and reduce energy utilization between 10% and 50% in indoor space cooling. The coefficient of performance (COP) of this regeneration category is capable of being as high as 6, which is an indication of its promising energy-saving propensity. Highlights• Review on liquid desiccant materials and the potential of deep eutectic solvents as bio-desiccants for air dehumidification.

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A review of liquid desiccant air dehumidification: From system to material manipulations

Cited by 136 publications

References 109 publications

Current status and development trend of dehumidification technology in low-humidity industries

Current status and development trend of dehumidification technology in low-humidity industries

The Synergy of Living and Water Wall in Indoor Environment—Case Study in City of Brno, Czech Republic

Desiccant solutions, membrane technologies, and regeneration techniques in liquid desiccant air conditioning system

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