Membrane-based enthalpy exchangers for coincident sensible and latent heat recovery

Asasian‐Kolur, Neda; Sharifian, Seyedmehdi; Haddadi, Bahram; Pourhosseinian, Mohammad; Shekarbaghani, Zahra Mousazadeh; Harasek, Michael

doi:10.1016/j.enconman.2021.115144

Cited by 22 publications

(7 citation statements)

References 191 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was applied without any modification as a reference membrane to compare the performance of two synthetic membranes. As mentioned earlier, paper membranes are the classic/traditional membranes used in air-to-air energy recovery systems due to their low cost, availability, and ease of use [ 7 , 8 ].…”

Section: Methodsmentioning

confidence: 99%

“…Various types of membranes with different materials and textures have been used as the core for enthalpy exchangers. An earlier study by the authors contains a comprehensive examination of the various types of membranes for this purpose [ 7 ]. Kraft papers are traditional membrane cores for dehumidifying air with relatively high efficiency.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Air-to-Air Heat and Moisture Recovery in a Plate-Frame Exchanger Using Composite and Asymmetric Membranes

et al. 2022

Self Cite

View full text Add to dashboard Cite

The present work studied an air-to-air exchanger comprising a flat plate module with a diagonal channel and a counterflow configuration for the air streams. The objective of this study was to remove moisture and sensible heat from an exhaust air stream by indirect contact with another air stream. The temperature and flow rate of the exhaust air was in the range of 40–80 °C and 1–5 L·min−1, respectively, and the fresh ambient air to exhaust air flow ratio was 1–5. An asymmetric porous membrane (P-MEM), a thin film composite membrane (C-MEM), and a kraft paper were used as the core for the heat exchange module. The most influential parameter was the humid air temperature, with a direct positive effect (50–60%) due to the increase in the kinetic energy of the water molecules. The other effective parameter was the flow rate of the humid gas with a reverse effect on the enthalpy exchanger performance (25–37%). The ratio of “fresh” air to “exhaust” air had the lowest positive effect (8–10%) on the total effectiveness. The sensible effectiveness of different membranes under the studied conditions was relatively the same, showing their similar heat conductivity. However, the kraft paper showed the best performance compared to the synthetic membranes due to having a porous/hydrophile texture. P-MEM with an asymmetric porous texture showed the closest performance to kraft paper. Furthermore, it was found that under limited conditions, such as higher temperatures (70 and 80 °C) and flow rates (5 L·min−1) for the humid air, the performance of P-MEM was a little better than the kraft paper. However, C-MEM with the lowest total effectiveness and overall heat transfer coefficient (150–210 W·m−2·K−1) showed that the hydrophile PEBAX layer could not contribute to moisture recovery due to its high thickness.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Air-to-Air Heat and Moisture Recovery in a Plate-Frame Exchanger Using Composite and Asymmetric Membranes

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…The membranes can be polymer membranes [2], hollow-fiber membranes [3], composite membranes [4], composite supported-liquid membranes [5], asymmetric membranes [6], etc. New membranes, geometry, flow configuration, performance improvement techniques, and design optimization efforts of MBEEs have been introduced comprehensively [7,8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Geometric Parameters on the Performance of a Membrane‐Based Enthalpy Exchanger

et al. 2023

View full text Add to dashboard Cite

A membrane‐based enthalpy exchanger (MBEE) with partial inlet is proposed. Numerical simulations were conducted to investigate the effect of Reynolds number (Re), the ratio of entrance area to channel cross‐sectional area Re−c, and channel length/width ratio Rl−w on the performance of the MBEE. Effectiveness, pressure loss, and flow patterns were evaluated for optimization. Moreover, the entransy theory was applied to analyze the mechanism of the heat transfer enhancement of the MBEE. The results indicate that the larger the Re–c, the higher the effectiveness and lesser pressure drop of the MBEE at the same volumetric flow rate. The total heat exchange rate per unit area and the pressure drop per unit length are reduced with the increasing of Rl–w .

show abstract

“…The CO 2 is then captured by physical interactions with the solvent or a chemical reaction, depending on the kind of solvent. The main advantages of membrane contactors are their known high surface area, compactness, simple operation and high energy efficiency (if heating/cooling is required, they can be very good heat exchangers) 15‐17 . In addition, membrane contactors can be easily scaled up and they also provide individual control over the liquid and gas flow rates, which facilitate the use of this technology in industry.…”

Section: Introductionmentioning

confidence: 99%

“…The main advantages of membrane contactors are their known high surface area, compactness, simple operation and high energy efficiency (if heating/cooling is required, they can be very good heat exchangers). [15][16][17] In addition, membrane contactors can be easily scaled up and they also provide individual control over the liquid and gas flow rates, which facilitate the use of this technology in industry. However, the use of a membrane separating the gas and liquid phases involves an extra mass transfer resistance (i.e.…”

Section: Introductionmentioning

confidence: 99%

Enhanced carbon dioxide membrane‐based absorption with amino acid solutions

Sefidi

Winand

Luis

2023

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BackgroundCurrent technologies for carbon dioxide (CO2) capture are based on a variety of physical and chemical processes using absorption towers. Overcoming the high energy consumption of conventional absorption is essential to develop a process that makes sense in terms of CO2 captured versus CO2 emitted. In this work, we propose the use of a membrane contactor that allows an efficient gas–liquid contact and an aqueous alkaline solution with several amino acids (i.e. arginine, methionine, valine, serine, 6‐aminohexanoic acid) as the absorption liquid.ResultsResults show clear differences in absorption performance among the studied amino acids, with arginine as the best choice. Using arginine does not only lead to the highest mass transfer coefficient (ca 0.004 m3 m−2 min−1) in the membrane contactor but also a remarkable CO2 absorption capacity without the need for an alkaline component that enhances the reaction and the mass transfer.ConclusionThe use of membrane contactors with a green solvent is a promising step that needs further studies. As the results demonstrate, arginine has shown a great performance; thus, it has been chosen for further investigation. © 2023 Society of Chemical Industry.

show abstract

Membrane-based enthalpy exchangers for coincident sensible and latent heat recovery

Cited by 22 publications

References 191 publications

Air-to-Air Heat and Moisture Recovery in a Plate-Frame Exchanger Using Composite and Asymmetric Membranes

Air-to-Air Heat and Moisture Recovery in a Plate-Frame Exchanger Using Composite and Asymmetric Membranes

Effect of Geometric Parameters on the Performance of a Membrane‐Based Enthalpy Exchanger

Enhanced carbon dioxide membrane‐based absorption with amino acid solutions

Contact Info

Product

Resources

About