Experimental study of a membrane-based dehumidification cooling system

Chen, Ziwei; Zhu, Jun; Bai, Hongyu; Yan, Yuying; Zhang, Li‐Zhi

doi:10.1016/j.applthermaleng.2016.10.153

Cited by 39 publications

(8 citation statements)

References 12 publications

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“…35 Other regular halide salt solution desiccants investigated in the literature are magnesium chloride (MgCl 2 ), 36 potassium formate (KCOOH), 48 and triethylene glycol (TEG). 18 The properties of these desiccants are summarized and included in Table 1. TEG and KCOOH desiccants are found to have negative melting temperature (Tm).…”

Section: Conventional Liquid Desiccantmentioning

confidence: 99%

“…Various researches have investigated diverse aqueous solutions as liquid desiccant in a dehumidification system for cooling application 34 . Common liquid desiccant solutions reported in the literature utilized lithium chloride (LiCl), 21 calcium chloride (CaCl 2 ), 35 magnesium chloride (MgCl 2 ), 36 lithium bromide (LiBr), 2 and tri‐ethylene glycol (TEG) as solutes 18 . Furthermore, Jradi and Rifatt 37 investigated dehumidification performance of potassium formate (KCOOH), which has a negative crystallization temperature, good chemical stability, less‐caustic effect, and low cost.…”

Section: Liquid Desiccant Dehumidification Systemmentioning

confidence: 99%

“…Having established hygroscopic capability of calcium chloride (CaCl 2 ), though lower than that of LiCl, the salient benefit of this desiccant is based on its low cost and availability 35 . Other regular halide salt solution desiccants investigated in the literature are magnesium chloride (MgCl 2 ), 36 potassium formate (KCOOH), 48 and triethylene glycol (TEG) 18 . The properties of these desiccants are summarized and included in Table 1.…”

Section: Liquid Desiccants Trend In Air Cooling Systemsmentioning

confidence: 99%

“…Therefore, the overall performance of LDAC equipment is predominantly associated with regenerator unit efficiency. 18 Despite the attractive energy-saving capability of LDACs, conventional desiccant solutions are corrosive to air-cooling equipment. The ionic liquids (ILs) with non-corrosive properties were found to be non-biodegradable, non-biocompatible, and their toxicity profile pose concerns being contrary to green solvent requirements.…”

Section: Introductionmentioning

confidence: 99%

“…Desiccant regenerator as an integral unit of LDACs claims a double portion of the total energy required by all other units in LDACs. Therefore, the overall performance of LDAC equipment is predominantly associated with regenerator unit efficiency 18 . Despite the attractive energy‐saving capability of LDACs, conventional desiccant solutions are corrosive to air‐cooling equipment.…”

Section: Introductionmentioning

confidence: 99%

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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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