Studying the characteristics and energy performance of a composite hollow membrane for air dehumidification

Bui, Tammy; Vivekh, P.; Islam, M.R.; Chua, Kian Jon

doi:10.1016/j.apenergy.2021.118161

Cited by 27 publications

(5 citation statements)

References 30 publications

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“…In fact, as the membrane's selectivity in DHU increases, the rate of air permeation decreases, and the vacuum pump consumes less energy. Therefore, a membrane with low selectivity improves the system performance in terms of temperature reduction; however, it does not necessarily improve energy consumption 40,41 . In addition to membrane selectivity, membrane surface area is a crucial design parameter in the system's power consumption.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, a membrane with low selectivity improves the system performance in terms of temperature reduction; however, it does not necessarily improve energy consumption. 40,41 In addition to membrane selectivity, membrane surface area is a crucial design parameter in the system's power consumption. Using a membrane with a lower surface area can provide a lower permeation rate and consequently lower power consumption of the vacuum pump.…”

Section: Gray Relational Analysismentioning

confidence: 99%

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An insight into hybrid membrane‐based air conditioning system performance using gray relational analysis methods: Structural versus operational parameters

Hashemifard

Abdollahi

Khosravi

et al. 2022

Env Prog and Sustain Energy

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Various parameters have an impact on the fresh air temperature and input power of a hybrid membrane-based air conditioning (HMBAC) system, such as pressure ratio, membrane selectivity, membrane permeance, membrane area, air flowrate of the dehumidification unit, and module length, number of fibers, and fiber outer diameter of the humidification unit, which comprise both operational and structural parameters. Therefore, in this study, the effects of these parameters on the system performance are examined separately based on a statistical approach. The importance order of each parameter and its contribution ratio are determined by using Taguchi method and ANOVA analysis. The optimum level for each input parameter is determined using statistical analysis for the fresh air temperature and input power. Then, for the simultaneous minimization of fresh air temperature and input power Taguchigray relational grade (GRG) is used. GRG revealed that membrane selectivity, pressure ratio, and membrane permeance with the contribution ratio of 37.87%, 32.51%, and 10.55%, respectively, are the most critical parameters of the multiperformance of an HMBAC system. Interestingly dehumidification from a humid airflow can be more effective when membranes with low selectivity and high permeability are used.In conclusion, the optimization outputs disclosed that both structural and operational parameters have significant effects on the performance of the HMBAC system and this optimization can be a helpful tool for designing a HMBAC systems to cover the optimal conditions to develop a sustainable membrane-based air conditioning system.

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Section: Resultsmentioning

confidence: 99%

Section: Gray Relational Analysismentioning

confidence: 99%

An insight into hybrid membrane‐based air conditioning system performance using gray relational analysis methods: Structural versus operational parameters

Hashemifard

Abdollahi

Khosravi

et al. 2022

Env Prog and Sustain Energy

View full text Add to dashboard Cite

show abstract

“…Also, in the facilities department in the gas industry, the presence of water in gas pipelines can cause two main problems; the presence of small amounts of water along with the presence of some sour gases causes widespread acid corrosion in gas transmission pipelines. This issue would cause the imposition of costs and the possibility of risks due to gas leakage (11,12). Also, water is one of the main bases for the formation of gas hydrates (13), and formation of solid methane hydrates in pipes containing gas in different parts of the facility can change the flow pattern, pressure changes and also, with its rapid growth, it can stop the gas transmission operation due to the blockage of the pipe and the possibility of its bursting (14).…”

Section: Introductionmentioning

confidence: 99%

Effect of SiO2 Concentration and Time on Stability of TiO2 Zeolite Nanocomposite Membrane in Light Gas Dehumidification

Fouladi,

Mazaheri,

Marjani

2024

IJE

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The main goal of this research is to use zeolite TiO2 nanocomposite membranes in order to remove moisture from gas. For this reason, a certain TiZ-V membrane was selected and manufactured as a standard membrane, which was the result of the initial assessment of a suitable membrane for gas dehumidification, and this membrane was used as a standard to measure the effect of manufacturing parameters. The findings showed that increasing the concentration of SiO2 had greatest effect on increasing the water flux of the membrane due to the effect of increasing the reaction time of the vapor phase carrier and reducing the selectivity drop at higher pressures. Also, the experiments of changing the relative humidity of the feed have shown the improving efficiency of the membrane in relative humidities lower than 80%, so that under the conditions of lower relative humidity, the selectivity of the membrane has increased. Another positive point found is a slight change in the selectivity efficiency of the membrane with respect to different relative humidities. This case showed the stability of membrane performance under the different conditions of humidity of the feed gas. Next, in order to increase the performance of membrane as much as possible, the sweeper gas was added from the inside of membrane. Increase in the sweeper gas, which increases the water concentration gradient and decreases the gas concentration gradient on the sides of membrane wall, increases the selectivity of membrane to the highest level of 543.

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“…However, challenges persist with polymeric UF membranes such as fouling, aging, and a tradeoff between selectivity and permeability [ 1 , 2 ]. In parallel, air cooling based on membrane air-dehumidification has emerged as an alternative to conventional mechanical vapor-compression cooling, offering benefits in energy savings, environmental sustainability, and economic feasibility [ 11 , 12 , 13 , 14 , 15 ]. This approach involves hydrophilic membranes for isothermal water vapor separation from ambient air, allowing for efficient dehumidification and a comfortable humidity level [ 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Thermally Reduced Graphene on the Characteristics and Performance of Polysulfone Mixed Matrix Ultrafiltration Membranes

Abdala,

Nabeeh,

Rehman

et al. 2023

Membranes

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Ultrafiltration (UF) polymeric membranes are widely used in water treatment and support desalination and gas separation membranes. In this article, we enhance the performance of Polysulfone (PSF) mixed matrix membranes (MMMs) by dispersing different concentrations of thermally reduced graphene (TRG) nanofillers. The UF PSF-TRG MMMs were fabricated via the phase inversion process, and the impact of TRG loading on the characteristics of the membrane, including hydrophilicity, porosity, roughness, and morphology, were analyzed using a contact angle measurement, atomic force microscopy (AFM), scanning electron microscopy (SEM), and dynamic mechanical analysis. Incorporating TRG into the PSF matrix led to favorable effects in the instantaneous de-mixing during phase inversion, increasing the porosity and hydrophilicity of MMMs and improving the mechanical properties of the membranes. Moreover, membrane performance was examined to remove dispersed oil from oil–water emulsion and support air-dehumidification membranes. MMM performance in terms of flux and oil rejection was superior to the control PSF membrane. Incorporating 0.25% TRG into PSF resulted in a 70% water flux increase and higher oil rejection compared to the control PSF membrane. As a support for air-dehumidification membranes, the MMM also demonstrated enhanced humidity reduction and an over 20% increase in water vapor permeance over the control PSF membrane. These results indicate that the PSF-TRG MMMs are an excellent candidate for reliable oil–water separation and as a support for air-dehumidification membranes.

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Studying the characteristics and energy performance of a composite hollow membrane for air dehumidification

Cited by 27 publications

References 30 publications

An insight into hybrid membrane‐based air conditioning system performance using gray relational analysis methods: Structural versus operational parameters

An insight into hybrid membrane‐based air conditioning system performance using gray relational analysis methods: Structural versus operational parameters

Effect of SiO2 Concentration and Time on Stability of TiO2 Zeolite Nanocomposite Membrane in Light Gas Dehumidification

Effect of Thermally Reduced Graphene on the Characteristics and Performance of Polysulfone Mixed Matrix Ultrafiltration Membranes

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