Spacer enhanced heat and mass transfer in membrane-based enthalpy exchangers

Koester, Steven J.; Klasen, A.; Lölsberg, Jonas; Weßling, Matthias

doi:10.1016/j.memsci.2016.06.002

Cited by 24 publications

(2 citation statements)

References 28 publications

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“…This can be achieved by mirroring the permeate withdrawal to the other side of the envelope. These additional ports to the envelope, and hence to the module, could be employed to supply a sweep gas for increasing driving force , , for contacting two gas streams as, e.g., in an enthalpy exchanger or to allow for membrane contactor operation .…”

Section: Discussionmentioning

confidence: 99%

Characterization of a New Flat Sheet Membrane Module Type for Gas Permeation

Brinkmann¹,

Notzke²,

Wolff³

et al. 2018

Chemie Ingenieur Technik

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Modern high‐performance flat sheet gas separation membranes exhibit high permeances as well as high selectivities, e.g., for CO2 separation. Novel membrane modules are desirable to transfer the intrinsic membrane performance to the process. The introduced module implements countercurrent flow, which allows for the best utilization of the required driving force, provided concentration polarization and pressure drops can be kept at bay. As such, it is different from established flat sheet modules for gas separation. The design features allow for straightforward scaling and easy adjustment to other operating conditions. During module development equation‐oriented modeling, computer‐aided engineering design and application of computational fluid dynamics for flow optimization were integrated. The prototype was investigated in a pilot plant. The experimental results reflected the simulation predictions and proved the validity of the module concept.

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Section: Discussionmentioning

confidence: 99%

Characterization of a New Flat Sheet Membrane Module Type for Gas Permeation

Brinkmann¹,

Notzke²,

Wolff³

et al. 2018

Chemie Ingenieur Technik

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“…Certain variations to the flow passage shape can promote mixing and reduce the heterogeneity of the temperature and moisture distributions. Other researchers have demonstrated significant performance boosts through such variations . One promising variation is adding angled ribs to the channel walls, which has been studied by many in the turbulent regime and, to a lesser extent, in the laminar regime .…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental analysis of forced convection in rib‐roughened channels with moisture‐permeable walls

et al. 2019

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Ribbed features can promote mixing and improve convective heat and mass transfer in channels. This can be beneficial in certain exchangers, such as Energy Recovery Ventilators (ERVs), which employ moisture-permeable membranes to transfer both latent and sensible heat. In this work, a computational fluid dynamics model with experimental validation was used to study angled rib mixing features in compact channels. Results show that, relative to a smooth channel, the ribs increase the channel Sherwood and Nusselt numbers by a larger fraction than the corresponding increase in friction factor. For a typical commercial grade ERV, total effectiveness can be improved by over 10% for an equal pressure drop by adding ribs and slightly increasing the channel height. A custom test stand and rib-forming technique were developed to validate the simulation predictions. The experiments confirm the net benefit of ribbed channels and agree with the simulation results within experimental uncertainty.

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