A novel opposite sinusoidal wave flow channel for performance enhancement of proton exchange membrane fuel cell

Simulation Research on the Performance of PEMEC with Single Channel Flow Field Established by Orthogonally Sinusoidal Function with Different Amplitudes and Angular Frequencies

“…Since the structure is designed on the horizontal plane, the effect of the horizontally sinusoidal amplitude on the performance of PEMEC can also be studied by the horizontal velocity at the ACH-AGDL interface, as shown in Figures 11(a Comparing the distribution of horizontal velocities in Group 3 and Group 6, the high-speed regions positively correlated to amplitude will be formed near both the trough of the horizontal sinusoid. This conclusion is the same as that obtained by Zhou et al [35]. However, this region is more prominent in the same frequency channel than the opposite one.…”

“…The researches on periodic fluctuations are mainly focused on the single horizontal [33,34] or vertical layout [35], while the orthogonal structures in both horizontal and vertical planes at the same time are rarely studied. Therefore, a periodic fluctuation structure can be introduced into the flow channel design of PEMEC.…”

Improvement of Blocked Long-Straight Flow Channels in Proton Exchange Membrane Fuel Cells Using CFD Modeling, Artificial Neural Network, and Genetic Algorithm

“…Therefore, the net power density was chosen to be optimized as the objective function of the trapezoidal baffles. The relationship is shown in Equations ( 21)- (23).…”

“…The parallel flow field shows worse distribution uniformity of reactive gases than the serpentine and the interdigital flow fields [22]. Methods in former research to improve the distribution uniformity of reactive gases, namely changing the cross-section flow channel or adding block structure, or baffles, in the flow channel, have been investigated [23][24][25][26][27]. Zhang et al built a fuel cell model with baffles in cathode flow channels to study the influence of the distribution and size of baffles on the performance of PEMFC, and found that the baffles in flow channels could improve the performance of PEMFC by enhancing the distribution uniformity of reactive gases [28].…”

Study of a proton exchange membrane fuel cell and metal hydride system based on double spiral structure coupling

“…Proton exchange membrane fuel cells, among the foremost potential energy-conversion devices, generate a large amount of low-grade waste heat during operation, which is equivalent to 45%–60% of the total hydrogen energy. 16,17 To ensure that fuel cells operate within the appropriate temperature range and avoid flooding 18,19 and overheating, effective water transport management 20,21 and thermal management 22 are essential. Using waste heat from the PEMFC in a combined cooling, heating and power generation (CCHP) system 23–25 can improve energy gradient utilisation; directing PEMFC waste heat to the MH tank to maintain H 2 desorption can ensure stable system operation.…”