Experimental performance comparison of adiabatic and internally-cooled membrane dehumidifiers

Annadurai, Gurubalan; Tiwari, Shaligram; Maiya, M.P.

doi:10.1093/ijlct/cty020

Cited by 20 publications

(2 citation statements)

References 16 publications

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“…Therefore, the inlet temperature of desiccant in the A-LDEE is lower than that of I-LDEE for the dehumidification process. This operating condition was considered for the performance comparison of A-LAMEE and I-LAMEE by Gurubalan et al [144]. Even with a higher desiccant inlet temperature, I-LAMEE outperforms A-LAMEE.…”

Section: Fig34: Schematic Of A-ldee For (A) Dehumidification and (B) ...mentioning

confidence: 99%

A comprehensive review of dehumidifiers and regenerators for liquid desiccant air conditioning system

Gurubalan

Simonson

2021

Energy Conversion and Management

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Section: Fig34: Schematic Of A-ldee For (A) Dehumidification and (B) ...mentioning

confidence: 99%

A comprehensive review of dehumidifiers and regenerators for liquid desiccant air conditioning system

Gurubalan

Simonson

2021

Energy Conversion and Management

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“…To deal with this issue, Isetti et al [7] drawn attention to the performance improvement of LDCs by designing and developing the first prototype of a combined membrane contactor, which is internally cooled by a refrigerant flow directly derived by a vapor compression cycle. Since then, there has been a growing number of experimental and numerical studies on the performance of internally cooled membrane-based dehumidifiers [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Performance of a Compact Three-Fluid Combined Membrane Contactor for Dehumidification in Electric Vehicles

et al. 2019

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In this paper, the performance of a compact Three-Fluid Combined Membrane Contactor (3F-CMC) is investigated using Computational Fluid Dynamics (CFD), supported and validated with a good agreement by an experimental campaign made on a fully working prototype. This internally-cooled membrane contactor is the core component of a hybrid air conditioning system for electric vehicles (EVs) developed in a successful H2020 project called XERIC. In the adopted numerical approach, the conjugate heat and mass transfer inside the 3F-CMC is described by non-isothermal incompressible flows and vapor transport through a PTFE hydrophobic membrane. The sensitivity of the 3F-CMC performance to air/desiccant flow rates, temperature, humidity, and desiccant concentration is analyzed numerically through the validated CFD codes. According to this study, the moisture removal increases by the inlet humidity ratio, nearly linearly. Under the considered conditions (where the inlet air temperature is 26.2 °C), when the inlet relative humidity (RH) is 75% the moisture removal is about 450% higher than the case RH = 37%, while the absorption effectiveness declines about 45%. Furthermore, this study shows that the amount of absorbed vapor flux rises by increasing the airflow rate; on the other hand, the higher the airflow rate, the lower is the overall absorption efficiency of the 3F-CMC. This investigation gives important suggestions on how to properly operate a 3F-CMC in order to achieve the requested performance, especially in hot and humid climates.

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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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Experimental performance comparison of adiabatic and internally-cooled membrane dehumidifiers

Cited by 20 publications

References 16 publications

A comprehensive review of dehumidifiers and regenerators for liquid desiccant air conditioning system

A comprehensive review of dehumidifiers and regenerators for liquid desiccant air conditioning system

Investigation on the Performance of a Compact Three-Fluid Combined Membrane Contactor for Dehumidification in Electric Vehicles

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

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