Investigation on the liquid contact angle and its influence for liquid desiccant dehumidification system

Qi, Ronghui; Jiang, Yu-Qiang

doi:10.1016/j.ijheatmasstransfer.2015.04.080

Cited by 19 publications

(4 citation statements)

References 22 publications

(27 reference statements)

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“…Then the minimum flow rates were calculated by employing the Hartley's empirical formula. The properties of viscosity, density, and surface tension coefficient were obtained by referring to the literature (Conde 2004), and the contact angle by the literature (Qi et al 2015). The comparison between the results of the present experiment and Hartley's empirical formula was demonstrated in Fig.…”

Section: Minimum Wetting Ratementioning

confidence: 78%

“…It was easy to find the viscosity variation was much bigger, that is, nearly 30% within the temperature range. In addition, it was reported that the increase of the solution temperature would result in lower contact angle (Qi et al 2015). In fact, in the early work (Hartley and Murgatroyd 1964), the equation of the minimum wetting rate for laminar isothermal flow had been developed, as follows,…”

Section: Minimum Wetting Ratementioning

confidence: 99%

See 1 more Smart Citation

Experimental study of the flow characteristics in a falling film liquid desiccant dehumidifier

Luo¹,

Chen

Zhong³

et al. 2016

Science and Technology for the Built Environment

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The flow characteristics play great role in determining the heat and mass transfer performance of a falling film liquid desiccant dehumidifier. Even though there have been lots of studies reporting the flow behaviors in different devices and fields, the fundamental researches of the film flow characteristics in a liquid desiccant dehumidifier were still very limited, especially for experiment. Therefore, in present work, a simple single channel test rig was established for observing and describing the flow characteristics in the dehumidifier. The impacts of various variables on the flow morphology, coverage ratio, and minimum wetting rate have been analyzed in detail. A correlation was developed to predict the minimum wetting rate of the solution flow. The research results can further verify the correctness of our previous simulation work as well.

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Section: Minimum Wetting Ratementioning

confidence: 78%

Section: Minimum Wetting Ratementioning

confidence: 99%

Experimental study of the flow characteristics in a falling film liquid desiccant dehumidifier

Luo¹,

Chen

Zhong³

et al. 2016

Science and Technology for the Built Environment

View full text Add to dashboard Cite

show abstract

“…The LDD packing arrangement is another critical factor influencing the dehumidification performance [16]. The available packing types are namely, wetted wall, spray tower, packed column and membrane-based, which provide the solution and air flow in different patterns including parallel, counter and cross flows.…”

Section: Introductionmentioning

confidence: 99%

Performance assessment of a membrane liquid desiccant dehumidification cooling system based on experimental investigations

Chen

Zhu

Bai

2017

Energy and Buildings

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A membrane-based liquid desiccant dehumidification cooling system is studied in this paper for energy efficient air conditioning with independent temperature and humidity controls. The system mainly consists of a dehumidifier, a regenerator, an evaporative cooler and an air-to-air heat exchanger. Its feasibility in the hot and humid region is assessed with calcium chloride solution, and the influences of operating variables on the dehumidifier, regenerator, evaporative cooler and overall system performances are investigated through experimental work. The experimental results indicate that the inlet air condition greatly affects the dehumidification and regeneration performances. The system regeneration temperature should be controlled appropriately for a high energy efficiency based on the operative solution concentration ratio. It is worth noting that the solution concentration ratio plays a considerable role in the system performance. The higher the solution concentration ratio, the better the dehumidification performance. However simultaneously more thermal input power is required for the solution regeneration, and a crystallization risk in the normal operating temperature range should be noted as well. The system mass balance between the dehumidifier and regenerator is crucial for the system steady operation. Under the investigated steady operating condition, the supply air temperature of 20.4°C and system COP of 0.70 are achieved at a solution concentration ratio of 36%.

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“…Among them, CaCl 2 is the cheapest and most readily available desiccant 5 . There are various packing types of the liquid desiccant system, such as wetted wall, spray tower, packed column and membrane-based 6 . The membrane-based system using an indirect contact for dehumidification has been more attractive with elimination of solution carryover problem.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of a membrane-based dehumidification cooling system

Chen

Zhu

Bai

et al. 2017

Applied Thermal Engineering

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Investigation on the liquid contact angle and its influence for liquid desiccant dehumidification system

Cited by 19 publications

References 22 publications

Experimental study of the flow characteristics in a falling film liquid desiccant dehumidifier

Experimental study of the flow characteristics in a falling film liquid desiccant dehumidifier

Performance assessment of a membrane liquid desiccant dehumidification cooling system based on experimental investigations

Experimental study of a membrane-based dehumidification cooling system

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