Effect of inserting obstacles in flow field on a membrane humidifier performance for PEMFC application: A CFD model

Houreh, Nasser Baharlou; Shokouhmand, Hossein; Afshari, Ebrahim

doi:10.1016/j.ijhydene.2019.09.189

Cited by 37 publications

(9 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the basic principle of fluid dynamics and the application of PEMFCs, the following assumptions are made for the mathematical model: 23 , 24 All gases are assumed to be under ideal conditions. Reaction gases exhibit laminar flow in the channel and are incompressible.…”

Section: Models Developmentmentioning

confidence: 99%

“…A PEMFC is a complex system that is associated with multiple physical fields, such as the flow, mass concentration, and electrical fields. 23 Therefore, the governing equations include the mass conservation equation, momentum conservation equation, energy conservation equation, component conservation equation, charge conservation equation, and liquid water transport equation.…”

Section: Models Developmentmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of Ship Vibration Effects on the Gas Distribution and Output Voltage of a Proton Exchange Membrane Fuel Cell

et al. 2022

View full text Add to dashboard Cite

The effects of ship vibrations on the mass transfer and performance of proton exchange membrane fuel cells (PEMFCs) have many vague aspects. Hence, the method of loading ship vibrations with the sliding mesh is first proposed in this paper. Furthermore, this method is adopted to form the solution of the simulation study of PEMFC performance under ship vibrations. In the framework of computational fluid dynamics, the ship vibration is loaded into the three-dimensional PEMFC model and successfully solved. Then, a series of special cases are performed to explore the gas distribution and output features of PEMFCs in ship environments with different vibrations. Finally, the results show that the ship vibrations have vectorial effects on the gas transfer in the PEMFC. Additionally, vibrations perpendicular to the channel evidently affect the gas transfer. Moreover, while the vibrations are parallel to the channel, they remain nearly normal. Relatively, a more significant influence on the output voltage of the PEMFC will occur under smaller frequencies and/or greater amplitudes of ship vibrations.

show abstract

Section: Models Developmentmentioning

confidence: 99%

Section: Models Developmentmentioning

confidence: 99%

Investigation of Ship Vibration Effects on the Gas Distribution and Output Voltage of a Proton Exchange Membrane Fuel Cell

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Many macroscale studies have been carried out to investigate water transport within the PEMFC. − The apparent effect of the saturated state of liquid water on the performance of PEMFC was revealed by Zhang et al Peng et al developed a three-dimensional heat and mass transfer model of a PEMFC with dead-end anode channels and found that periodic purging was effective in improving water management. Houreh et al and Peng et al explored the effects of adding obstacles and porous media to the flow channel on water management in PEMFC, respectively. The effects of the designed novel flow fields on the removal of liquid water were simulated by Dang et al and Shen et al It is well known that water is generated in the catalyst layer and transported through the gas diffusion layer (GDL) to the gas channel (GC).…”

Section: Introductionmentioning

confidence: 99%

Pore-Scale Modeling of Mass Transport in Partially Saturated Cathode Gas Diffusion Layers of Proton Exchange Membrane Fuel Cell

Wang

Yang

et al. 2022

Energy Fuels

View full text Add to dashboard Cite

Proton exchange membrane fuel cells (PEMFCs) have the advantages of high specific power, good stability, and zero emissions, making them clean and efficient energy conversion devices. Water management is one of the technical challenges limiting the development of PEMFC, with liquid water blocking the pores and increasing the resistance to mass transport. In this paper, a two-dimensional (2D) multiphase lattice Boltzmann (LB) model is developed to obtain the liquid water morphology within the gas diffusion layer (GDL). A 2D multicomponent flow Lattice Boltzmann model considering electrochemical reactions is established to investigate the effects of water saturation, activation overpotential, and pressure difference between the inlet and outlet gas channels on mass transport. At high water saturation, the liquid water forms water films within the GDL preventing reactive gas transport and water vapor are blocked near the catalyst layer making it difficult to remove. The PEMFC can achieve higher current densities at high activation overpotentials, but oxygen starvation will be exacerbated. Increasing the pressure difference between the inlet and outlet gas passages effectively increases the oxygen concentration and reduces the water vapor concentration in the GDL. The present study improves the understanding of the effect of GDL microstructure on mass transport and performance of PEMFC from the mesoscopic scale.

show abstract

“…The design of a side-flow filtration module in a bioreactor was investigated in [ 45 ]. The influence of several obstacles on the flow field and mass transfer was studied in [ 46 ]. Oscillatory flow and enhanced slip velocity were investigated in [ 42 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Modifying the Membrane Surface with Microcapsules on the Flow Field for a Cross-Flow Membrane Setup: A CFD Study

et al. 2021

View full text Add to dashboard Cite

In this study, the attachment of microcapsules on the membrane surface and its influence on the flow field for a cross-flow membrane setup are investigated. The microcapsules were placed on the top layer of the membrane. The overall purpose of this modification was the prevention of membrane biofouling. Therefore, in a first step, the influence of such a combination on the fluid flow was investigated using computational fluid dynamics (CFD). Here, different properties, which are discussed as indicators for biofouling in the literature, were considered. In parallel, different fixation strategies for the microcapsules were experimentally tested. Two different methods to add the microcapsules were identified and further investigated. In the first method, the microcapsules are glued to the membrane surface, whereas in the second method, the microcapsules are added during the membrane fabrication. The different membrane modifications were studied and compared using CFD. Therefore, virtual geometries mimicking the real ones were created. An idealized virtual geometry was added to the comparison. Results from the simulation were fed back to the experiments to optimize the combined membrane. For the presented setup, it is shown that the glued configuration provides a lower transmembrane pressure than the configuration where microcapsules are added during fabrication.

show abstract

Effect of inserting obstacles in flow field on a membrane humidifier performance for PEMFC application: A CFD model

Cited by 37 publications

References 64 publications

Investigation of Ship Vibration Effects on the Gas Distribution and Output Voltage of a Proton Exchange Membrane Fuel Cell

Investigation of Ship Vibration Effects on the Gas Distribution and Output Voltage of a Proton Exchange Membrane Fuel Cell

Pore-Scale Modeling of Mass Transport in Partially Saturated Cathode Gas Diffusion Layers of Proton Exchange Membrane Fuel Cell

Effect of Modifying the Membrane Surface with Microcapsules on the Flow Field for a Cross-Flow Membrane Setup: A CFD Study

Contact Info

Product

Resources

About