Optimization of parameters for air dehumidification systems including multilayer fixed-bed binder-free desiccant dehumidifier

Yu, Lili; Shamim, Jubair A.; Hsu, Wei‐Yen; Daiguji, Hirofumi

doi:10.1016/j.ijheatmasstransfer.2021.121102

Cited by 19 publications

(3 citation statements)

References 34 publications

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“…However, the heat and mass transfer performance of the system was affected not only by the overall thermal resistance, but by the thermal resistance between the evaporator and vessel wall, so the device needed to be further optimized. Yu et al [31] reduced the impact of adsorption heat by adding water heating and cooling devices to the multi-layer fixed bed non binder dehumidifier to improve the dehumidification efficiency of the system, as shown in Figure 2e. Under the conditions of T=27 ℃, v=0.9 m/s and w 0 =10.01 g/kg and 14.88 g/kg respectively, the maximum dehumidification efficiency of the dehumidifier was 24% and 33% higher than that of the traditional fixed bed.…”

Section: Single Materials Packed Bedmentioning

confidence: 99%

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Research Progress of Fixed Bed Dehumidification System: A Mini Review

Xiao

Han

2022

J. Solar Eneg. Res. Updat.

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In recent years, the fixed bed dehumidification system has received extensive attention. Research shows that the fixed bed can be combined with the vapor compression refrigeration system to replace the traditional air conditioning (A/C) system, improve the dehumidification efficiency of the system and reduce energy consumption of A/C. In this study, the optimization and improvement methods of the fixed bed dehumidifier in recent years are introduced in detail firstly. It points out that adding heating/cooling devices to the fixed bed can greatly improve the dehumidification capacity and efficiency of the system, which is the main method to improve the fixed bed currently; Optimizing the structure of fixed bed is also an effective method, but the current research results have limited improvement on dehumidification performance; Optimizing the regeneration mode of fixed bed can improve the utilization rate of renewable energy and improving the overall dehumidification efficiency of the system, but the research in the direction is still insufficient; The parallel double packed bed structure can ensure the continuous operation of the fixed bed to improve the dehumidification efficiency of the system, but such systems are large in scale and high in cost. Then the dehumidification performances of various systems are summarized and comprehensively compared. Finally, the future optimization and improvement direction of the fixed bed is pointed out.

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Section: Single Materials Packed Bedmentioning

confidence: 99%

“…Figure 2: (a) Intercooling packed bed[17], (b) Cooling packed bed[28], (c) Internal cooling solid desiccant bed[29], (d) Schematic of the three HCOHPs integrated with the packed bed[30], (e) Schematic diagram of air dehumidification system[31], (f) Structure diagram of fixed bed with water pipes[32].…”

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confidence: 99%

Research Progress of Fixed Bed Dehumidification System: A Mini Review

Xiao

Han

2022

J. Solar Eneg. Res. Updat.

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“…Yu et al [27] proposed to add to the Shamim configuration [26] a water cooling and heating cycle. The authors performed digital simulation for this new proposed configuration for calculating any transient transfer of heat and mass, as well as optimizing all parameters.…”

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confidence: 99%

Study of adsorption and desorption kinetics of a silica gel/air couple

Hraiech,

Zallema,

Zili-Ghedira

2023

Preprint

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In the energy and environmental context and given the growing energy demand during industrial processes and thermal comfort, the interest of improving the performance of the involved systems and the optimization of their operations are essential. The present paper presents a comprehensive analysis of the adsorption and desorption isotherms of silica gels, a widely used desiccant material. Accurate characterization of adsorption and desorption behaviors is pivotal in assessing performance across various applications. In this study, we examine multiple isotherm equations pertaining to silica gel's interaction with water vapor. Our findings underscore the heightened significance of adsorption capacity, particularly at lower temperatures, as evidenced by our experimental results led with a climatic wind tunnel. Furthermore, we elucidate that adsorption and desorption isotherms follow distinct paths, emphasizing the gap with the hypothetical approaches. An empirical correlation that links water content to temperature and relative humidity is introduced and compared with different theoretical approaches. This research not only enhances our understanding of silica gel's adsorption properties but also lays the groundwork for its effective utilization in applications such as, atmospheric water generation, air conditioning systems and beyond.

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