Enhancement of performance of open liquid desiccant system with surface additive

Cihan, Ertuğrul; Kavasoğullari, Barış; Demir, Hasan

doi:10.1016/j.renene.2017.08.002

Cited by 13 publications

(4 citation statements)

References 27 publications

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“…For packed-bed absorber, the effective interfacial area is increased for the positive Marangoni effect. Absorption of water by LiCl solution [14] found that the surface area was larger for a 30° channel angle and 6 mm thickness packing material. Therefore, the maximum heat and mass transfer performance were 0.4 for COP and 85% for dehumidification efficiency.…”

Section: Discussion For Mass Transfer 31 Mass Transfer Results Formentioning

confidence: 98%

“…In addition to adding surface additives, the Marangoni instability could also be produced by the temperature dependence of the surface tension, such as nonlinear model of the instability in gas absorption was developed [13] to discuss the performance for carbon dioxide absorbed by water. Recently, the structured packings with different thickness and channel angles were designed [14] to study effect of packings and surface additives on the performance of water vapor absorbed by LiCl film. Based on the concept of Marangoni effect acting on the thin liquid film, the system n-heptane/ methylcyclohexane was used [15] to discuss the effect of positive and negative driving force on different packings.…”

Section: Solution Film In the Mass Transfer Equipmentmentioning

confidence: 99%

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Discussions of Effects of Surface Tension on Water Vapor Absorbed by Triethylene Glycol Solution Films

Wu¹,

Chung²

2018

Heat and Mass Transfer - Advances in Modelling and Experimental Study for Industrial Applications

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The surface tension gradient can result from releasing a surfactant from the liquid film or feeding a vapor into the liquid film, and the interfacial disturbance will be induced by them. The flowing phenomena were termed "Marangoni effect," and the mass transfer performance was enhanced by the effect. The objective of this study was to apply the Marangoni effect, such as water vapors absorbed by the liquid film of triethylene glycol (TEG) solution, and to analysze mass transfer behaviors with and without surfactants' addition in the liquid film. The interfacial disturbance resulted from the surface tension gradient was considered in this study, and the mass transfer behaviors for packed-bed absorbers were discussed to elucidate the influence of the Marangoni effect on the absorbers. It was observed that the trends of mass transfer rates could be increased significantly as the surfactant is added into the absorption system. Experimental results showed that feeding a vapor or adding a surfactant with lower surface tension and/or higher volatility in the liquid will result in the surface tension gradient on the gas-liquid interface. The induced flowing disturbance will lead to an increment of mass transfer rate for a gas-liquid contact system.

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Section: Discussion For Mass Transfer 31 Mass Transfer Results Formentioning

confidence: 98%

Section: Solution Film In the Mass Transfer Equipmentmentioning

confidence: 99%

Discussions of Effects of Surface Tension on Water Vapor Absorbed by Triethylene Glycol Solution Films

Wu¹,

Chung²

2018

Heat and Mass Transfer - Advances in Modelling and Experimental Study for Industrial Applications

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“…Surfactant-based additives also enhance the performance of the LDEE by improving the wettability of desiccants on its contact surface [30]. The most used surfactants are polyether-modified siloxane [37], triton X-100 [38], 1-octanol [39] and 2-ethyl-1-hexanol [40]. However, these surfactants are poisonous and odorous.…”

Section: Propertiesmentioning

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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“…Although liquid desiccant dehumidification systems have a low coefficient of performance, they are more interesting for general daily usage due to temperature independent humidity control and better indoor air quality [1][2][3][4]. In addition, the dilute liquid solution after dehumidification in the system can be regenerated using medium and low-temperature heat sources such as industrial waste heat, solar energy and geothermal energy.…”

Section: Introductionmentioning

confidence: 99%

Energy and Exergy Analysis of LiBr-aq and LiCl-aq Liquid Desiccant Dehumidification System

Kavasoğullari

Cihan

Demir

2020

Teh. glas. (Online)

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In this study, energy and exergy analysis of experimental results obtained from a dehumidification system using LiBr-aq (lithium bromide-water) and LiCl-aq (lithium chloridewater) as desiccant was made. In dehumidifier and regenerator columns polycarbonate sheets, which have not been used before, were used as packing material to increase contact area in purposed liquid desiccant dehumidification system. In the analysis, variation of electrical coefficient of performance and exergy efficiency with airflow rate for different solution mass flow rates were investigated. Because of investigation, maximum values of electrical coefficient of performance and exergy efficiency were calculated approximately as 2.8 and 18%, respectively.

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Enhancement of performance of open liquid desiccant system with surface additive

Cited by 13 publications

References 27 publications

Discussions of Effects of Surface Tension on Water Vapor Absorbed by Triethylene Glycol Solution Films

Discussions of Effects of Surface Tension on Water Vapor Absorbed by Triethylene Glycol Solution Films

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

Energy and Exergy Analysis of LiBr-aq and LiCl-aq Liquid Desiccant Dehumidification System

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