Performance characterization of membrane dehumidifier with desiccants in flat-plate arrangement

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

doi:10.1016/j.enbuild.2017.09.040

Cited by 23 publications

(14 citation statements)

References 23 publications

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“…The membrane allows the water vapor to cross while other gases are stopped from crossing. 25 Gurubalan et al 38 have formulated a numerical model to analyze membranebased dehumidifier performance at different air and desiccant operating parameters, using CaCl 2, LiCl, and LiBr as an LD. It is found that a membrane-based dehumidifier provides a better moisture removal rate at a high flow rate using LiCl as a desiccant.…”

Section: Falling Filmmentioning

confidence: 99%

Developments in liquid desiccant dehumidification system integrated with evaporative cooling technology

Kalpana

Subudhi

2021

Intl J of Energy Research

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The vapor compression air conditioning (VCAC) is the most widely used method for space cooling. However, it has some disadvantages, such as the fact that it consumes more electricity, depletes the ozone layer, and contributes to global warming. The liquid desiccant system using an evaporative cooler is a better replacement for a VCAC because it is cost-effective and environmentally sustainable. This paper initially introduces the fundamental principles of desiccant cooling and different types of liquid desiccant systems. Then, the desiccant systems using evaporative coolers are comprehensively reviewed. Finally, the assessment of system performances by different researcher's works is evaluated. It is observed from the review work that the liquid desiccant cooling system (LDCS) using an evaporative cooler could save energy consumption compared to VCAC. Highlights• Liquid desiccant dehumidifiers integrated with evaporative coolers are discussed.• LD dehumidifier integrated with evaporative cooler is an energy-efficient alternative in hot and humid areas.• DEVap system saves 2% to 3% of the annual energy.• The use of an LD dehumidifier in conjunction with an M-cycle IEC increases dehumidification.

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Section: Falling Filmmentioning

confidence: 99%

Developments in liquid desiccant dehumidification system integrated with evaporative cooling technology

Kalpana

Subudhi

2021

Intl J of Energy Research

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“…It is the measure of the amount of water vapor that passes from one medium to another through a material of a given thickness and surface area and at a defined unit of time. The water vapor transmission is induced by the difference in vapor pressure between the two different media caused by the difference in temperature and concentration [16], [17]. If the membrane is not permeable or has a very low permeability, water vapor would be trapped within the material causing condensation to occur if its temperature reaches the saturation one.…”

Section: Introductionmentioning

confidence: 99%

Modified upright cup method for testing water vapor permeability in porous membranes

Mustapha

Zoughaib

Ghaddar

et al. 2020

Energy

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“…Gurubalan et al. 25 numerically analyzed the membrane-based dehumidifier performance with three liquid desiccants LiCl, LiBr, and CaCl 2 . Their results indicated that the moisture transfer performance of LiCl desiccant is superior to other two desiccants for same inlet temperature and concentration.…”

Section: Introductionmentioning

confidence: 99%

“…Abdel-Salam et al 24 numerically studied the sensitivity of the steady state performance of a flat-plate LAMEE and found that the optimum nominal air channel width and solution channel widths may be 5-6 mm and 1-2 mm, respectively. Gurubalan et al 25 numerically analyzed the membrane-based dehumidifier performance with three liquid desiccants LiCl, LiBr, and CaCl 2 . Their results indicated that the moisture transfer performance of LiCl desiccant is superior to other two desiccants for same inlet temperature and concentration.…”

Section: Introductionmentioning

confidence: 99%

“…The literature survey shows that studies so far are focused on the effect of various operating parameters on the membrane energy exchanger performance (dehumidifier or regenerator). 9,10,18,19,22,[23][24][25][26] Little work has addressed the effect of above-mentioned operating parameters on the whole system (LDAS) performance. 12,20,21 In their studies also, the influence of operating parameters on required solution cooling and heating loads of LDAS has not been addressed.…”

Section: Introductionmentioning

confidence: 99%

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Thermal energy analysis on liquid desiccant air conditioning system at different desiccant solution parameters

Reddy

Balasubramanian

Chandramohan

2019

Proceedings of the Institution of Mechanical Engineers, Part E:

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Selection of suitable liquid desiccant operating parameters plays a significant role in the design of energy efficient liquid desiccant air conditioning system. To achieve same dehumidification rate from ambient air, different combinations of solution parameters (heat capacity ratio, concentration, and vapor pressure) could be employed in the system. Considering dehumidifier air inlet condition and dehumidification rates are fixed, an analytical study is carried out on the thermal energy analysis of the system at different solution operating parameters. Operating parameters considered in this study are solution concentrations ( Cs = 0.25, 0.3, 0.35 and 0.40) and heat capacity ratios ([Formula: see text] = 2.5, 3, 4 and 5). Control volume which includes a pair of air and solution channels (half width channels) of full scale liquid-to-air membrane energy exchangers (LAMEE) has been chosen to analyze the energy transfer between air and solution. The results indicate system requires lesser chiller load ( Qchiller) at high concentration and low heat capacity ratio ( Cs = 0.40 and [Formula: see text] = 2.5) which is 0.29 kW to achieve 0.61 kW cooling load. This is 99% lesser than the Qchiller at high concentration and high heat capacity ratio ( Cs = 0.40 and [Formula: see text] = 5) and 30% lesser than the Qchiller at low concentration and low heat capacity ratio ( Cs = 0.25 and [Formula: see text] = 2.5). Solution heat addition rate ( Qadd) per kW cooling capacity ( Qcc) at this solution condition is found as 0.85 kW.

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Performance characterization of membrane dehumidifier with desiccants in flat-plate arrangement

Cited by 23 publications

References 23 publications

Developments in liquid desiccant dehumidification system integrated with evaporative cooling technology

Developments in liquid desiccant dehumidification system integrated with evaporative cooling technology

Modified upright cup method for testing water vapor permeability in porous membranes

Thermal energy analysis on liquid desiccant air conditioning system at different desiccant solution parameters

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