Air dehumidification by triethylene glycol desiccant in a packed column

Zurigat, Yousef H.; Abu-Arabi, Mousa; Abdul‐Wahab, Sabah A.

doi:10.1016/s0196-8904(03)00109-2

Cited by 103 publications

(34 citation statements)

References 19 publications

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“…Comparisons were made between the predicted values calculated by the analytical solution and experimental values available in the literature. Reliable sets of experimental data using triethylene glycol (TEG) as the liquid desiccant were reported by Zurigat et al (2004). Their tower had a total height of 0.6 m with a structured type packing consisting of eight decks with seven plates per deck, resulting in a packing Desiccant at the required temperature and flow rate was pumped into the top of the tower via the rotameter.…”

Section: Resultsmentioning

confidence: 99%

Analytical approach based on a mathematical model of an air dehumidification process

Babakhani

2013

Braz. J. Chem. Eng.

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-In this paper we developed an analytical solution for a mathematical model of an air dehumidification process. This solution has good accuracy when compared with reliable experimental data available in the literature. The present study was confined to the cases with the mass flow rate of desiccant solution being much greater than the minimum required by the equilibrium calculation, so that the changes in the concentration and the flow rate are relatively small. Validation of this assumption has been performed by HYSYS software version 3.2. The influence of the Lewis number (Le) on the analytical results was considered. As shown in the current study, we obtain better results with Le=1.1 compared with Le=1. The benefits of the present solution are its simplicity and easy application for the simulation of air dehumidification.

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Section: Resultsmentioning

confidence: 99%

Analytical approach based on a mathematical model of an air dehumidification process

Babakhani

2013

Braz. J. Chem. Eng.

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“…Therefore, different desiccants have different optimum operating concentration levels, e.g. 55-60% for lithium bromide, 30-45% for lithium chloride, 35-45% for CaCl 2 , < 35% for MgCl 2 , and 95-97% for TEG [18,19].…”

Section: Liquid Desiccant Materialsmentioning

confidence: 99%

“…The performance of the dehumidifier can be expressed in terms of the dehumidifier effectiveness/efficiency, moisture removal rate, or mass transfer coefficient [18,[42][43][44]. The dehumidifier effectiveness is the ratio of the achieved change in the humidity level of the air exiting the dehumidifier, to the maximum theoretical change.…”

Section: Dehumidifiersmentioning

confidence: 99%

Solar pond powered liquid desiccant evaporative cooling

Elsarrag

Igobo

Alhorr

et al. 2016

Renewable and Sustainable Energy Reviews

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Liquid desiccant cooling systems (LDCS) are energy efficient means of providing cooling, especially when powered by low-grade thermal sources. In this paper, the underlying principles of operation of desiccant cooling systems are examined, and the main components (dehumidifier, evaporative cooler and regenerator) of the LDCS are reviewed. The evaporative cooler can take the form of direct, indirect or semi-indirect. Relative to the direct type, the indirect type is generally less effective. Nonetheless, a certain variant of the indirect type -namely dew-point evaporative cooler -is found to be the most effective amongst all. The dehumidifier and the regenerator can be of the same type of equipment: packed tower and falling film are popular choices, especially when fitted with an internal heat exchanger. The energy requirement of the regenerator can be supplied from solar thermal collectors, of which a solar pond is an interesting option especially when a large scale or storage capability is desired.

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“…The mass transfer performance of a cross-flow dehumidifier/ regenerator was evaluated in terms of the moisture removal rate and the dehumidifier effectiveness [15][16][17][18]. The moisture removal rate (m w ) for the dehumidifier and the regenerator was calculated by Eqs.…”

Section: Moisture Removal Ratementioning

confidence: 99%

Heat and Mass Transfer between Air and Liquid Desiccant in Cross‐flow Contact Systems

2010

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In this paper, an analytical solution of the coupled heat and mass transfer process in a cross-flow liquid-desiccant dehumidifier/regenerator is developed. By the use of reliable assumptions, the government equations for the system are solved by an analytical method. The results of the present analytical solution are compared with experimental data from the literature, and they show good agreement. The maximum error produced by the presented analytical solution is less than 12 %. The effect of the operating parameters is considered using the presented analytical solution. The results show that air inlet humidity, air flow rate, desiccant inlet temperature, and desiccant inlet concentration have more influence on the moisture removal rate in the cross-flow dehumidifier. Also, air inlet humidity, desiccant inlet temperature, desiccant inlet concentration and desiccant flow rate have more effect on the moisture removal rate in the cross-flow regenerator. The effect of the Lewis number on the performance of the dehumidifier/regenerator is investigated. As the results show, by the use of Le = 1.08 in the dehumidification process and Le = 0.96 in the regeneration process, instead of the value of unity, better results are obtained. The benefit of the present study is a simplified application for the evaluation of the outlet parameters of the cross-flow air dehumidifier/regenerator.

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Air dehumidification by triethylene glycol desiccant in a packed column

Cited by 103 publications

References 19 publications

Analytical approach based on a mathematical model of an air dehumidification process

Analytical approach based on a mathematical model of an air dehumidification process

Solar pond powered liquid desiccant evaporative cooling

Heat and Mass Transfer between Air and Liquid Desiccant in Cross‐flow Contact Systems

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