Development of a piezoelectric proton exchange membrane fuel cell stack (PZT-Stack)

A Novel Hybrid Actuator Driven Magnetically in the Bi-Cell PEM Fuel Cell Stack

“…As a result, the total volume and weight of the stack were reduced to 97.5 cm 3 and 553 g, respectively. Compared with a previous design [16], the total volume and weight were reduced by 68% and 76%, respectively. The results of this study can be summarized as follows: First, the PZT actuator (with a curing time of 30 min for the PDMS) produced the largest amplitude of 1602 µm at a frequency of 135 Hz and voltage of 40 V. The power consumption was 0.073 W. Second, the tension in the PDMS was higher when the bi-cell PZTmag-PEMFC stack was assembled by a greater locking force, which reduced the resonance frequency and the amplitude of the PZTmag actuator.…”

“…The comparison with previously proposed fuel cell stack designs is shown in Figure 11. The maximum net power flux output of the bi-cell PZTmag-PEMFC stack in the series was 0.1925 W·cm −2 , compared to 0.1608 W·cm −2 in the previous design [16]. The net power flux output of the stack hence approximately increased by 20%.…”

“…The highest r air,in of 1.55 was attained when the diffuser had an angle (θ) of 15 • , when the opening width of the channel was (D) 1.0 mm, and the channel path (L) was 13.13 mm. In a previous study [16], the air inflow obtained had been 8.51 × 10 −8 m 3 ·s −1 on the diffuser side in supply mode when the angles of both the diffuser and the nozzle had been maintained at 10 • . In this study, the obtained air inflow was 8.87 × 10 −8 m 3 ·s −1 on the diffuser side in supply mode.…”

“…The power consumption of the PZTmag actuator under a frequency of 70 Hz and voltage of 40 V was 0.03 W, while the power output of the bi-cell PZTmag-PEMFC stack wFas 4.65 W. Thus, the module of the bi-cell PZTmag-PEMFC stack delivered a net power output of 4.62 W (the output in [16] was 3.86 W). The comparison with previously proposed fuel cell stack designs is shown in Figure 11.…”

“…Ma et al [16] also showed that the performance of a PZT-PEMFC cell can be improved by using a PZT stack design consisting of three bi-cells with a total reaction area of 24 cm 2 , a diffuser angle (θ) of 10 • , a channel path length (L) of 5.63 mm, and a channel opening width (D) of 1.0 mm. Moreover, the PZT stack did not exhibit open-circuit behavior even if a component cell failed in the electrical cascade configuration.…”