[PDF] Top 20 A numerical study on liquid water behaviours in PEM fuel cell cathode.

... liquid water flow across the GDL to the gas flow channels, and formation o f water droplets during this process are both unavoidable and important for practical operations o f PEM fuel ... See full document

... on water flooding, a figure that shows the accumulating liquid water at the cathode catalyst layer as function of current density is generated; see ...air-breathing fuel cell is ... See full document

... PEMFCs, liquid water management is attracting great efforts from many scientists and engineers ...and water transport in PEMFCs. A three-dimensional numerical model of straight gas-flow ... See full document

... the PEM fuel cell so the result in significant drop on potential and power ...to study the influence of various flow field designs by computational fluid dynamics ...this study, we ... See full document

... two-dimensional water and heat management model has been developed to simulate the energy, fluid and mass transfer processes inside a PEM fuel cell ...is water transport across the ... See full document

... of liquid water present at the bend of the flow ...the fuel cell performance as the operating conditions of flow rates, operating pressure and relative humidity ...by liquid ... See full document

... the PEM fuel cell as a potential power source for portable electronic devices, automotive systems, and power plant ...of PEM fuel cells are high operating efficiency, near-zero greenhouse ... See full document

... and numerical [20-25] studies have considered various techniques to improve the water management in ...of fuel cells, ...and water- removal designs [14, 15] while others concentrated on the ... See full document

... of water and reactants distribution, generated power density and lost power density due to pressure drop which are important parameters representing the cell operation ...membrane fuel cell ... See full document

... of fuel cell ...another study, they found that because PTFE decomposition results in a critical water imbalance and partial loss of electrochemical performance, it can be determined by x-ray ... See full document

... the water concentration in the ...segmented cell with 49 segments to measure the local current density distribution and high frequency ...and cathode relative humidity on the resulting water ... See full document

... membrane fuel cells (PEMFCs) convert hydrogen to electricity efficiently, with water as their main waste ...a fuel cell ...normal fuel cell operating conditions, it has been ... See full document

... The numerical investigation of the performance of PEMFC with various flow field designs, namely, the single parallel, serpentine, interdigitated and the pin flow field have been considered by Lee et ...the ... See full document

... in PEM fuel cell cathode channels, fi nding that fl ooding mostly occurs downstream in the serpentine inter-digitated structures and typically at the corners of the chan- ...a PEM ... See full document

... necessitated water for adding or omitting from the cathode side to keep the membrane fully ...the water phases (liquid + vapor) equilibrium in ...both water and thermal ...different ... See full document

... the water emerges into the channel area, the water has a certain trend of movement within the porous layer as ...the water appears in the porous layer of a fuel cell, there is a ... See full document

... a PEM fuel cell has been ...the water droplet, its size as well as the wettability of the gas diffusion layer (GDL) are investigated under different operating ...small water droplet in ... See full document

... the liquid water and temperature within PEM fuel cell, a parametric experimental study has been ...this study, the air flow rate has been changed to investigate its effect ... See full document

... membrane fuel cells (PEMFC) is studied numerically in the present ...nitrogen, liquid water and water ...mixture, liquid mass conservation, and the whole mixture mass ...this ... See full document

... a PEM fuel cell cathode electrode is presented, taking into account the electrochemical reaction in the catalyst layer and the microstructure of the ...this study also show the ... See full document