Mechanical Engineering Education, Andong National University, Andong 36729, Republic of Korea.
Ocean System Engineering, Cheju National University, Jeju 63243, Republic of Korea.
Sensors (Basel). 2023 Jan 10;23(2):808. doi: 10.3390/s23020808.
In this study, two thin rectangular PVDFs were installed in the form of a cantilever on a FTEH (funnel-type energy harvester), and a CTEH (cymbal-type energy harvester) was fabricated in a form coupled to the upper part of the support. As a result of measuring the energy harvesting sensitivity according to the installation direction of the CTEH, a high voltage was measured in the structure installed on top of the support across all flow velocity conditions. A composite structure PVDF energy harvester combining CTEH and FTEH was fabricated and the amount of power generated was measured. As a result of measuring the open-circuit voltage of the PVDF energy harvester device with a composite structure to which the optimum resistance of CTEH of 241 kΩ and the optimum resistance of FTEH of 1474 kΩ were applied at a flow rate of 0.25 m/s, the output voltage compared to the RMS average value was 7 to 8.5 times higher for FTEH than for CTEH. When the flow rate was 0.5 m/s, the electrical energy charged for 500 s was measured as 2.0 μWs to 2.5 μWs, and when the flow speed was 0.75 m/s, it reached 2.5 μWs when charged for 300 s, generating the same amount when the flow rate increased by 50%. The time to do it was reduced by 66.7%.
在这项研究中，两个薄的矩形聚偏二氟乙烯（PVDF）以悬臂的形式安装在一个漏斗式能量收集器（FTEH）上，并制作了一个与支撑物上部耦合的杯式能量收集器（CTEH）。根据 CTEH 的安装方向测量能量收集灵敏度的结果是，在所有流速条件下，在支撑物顶部安装的结构中测量到了高压。制作了一个结合 CTEH 和 FTEH 的复合结构 PVDF 能量收集器，并测量了产生的功率。通过测量在流速为 0.25 m/s 时施加了 CTEH 的最佳电阻 241 kΩ 和 FTEH 的最佳电阻 1474 kΩ 的复合结构 PVDF 能量收集器装置的开路电压，与 RMS 平均值相比，FTEH 的输出电压比 CTEH 高 7 到 8.5 倍。当流速为 0.5 m/s 时，测量了在 500 s 内充电的电能为 2.0 μWs 到 2.5 μWs，当流速为 0.75 m/s 时，在 300 s 内充电达到 2.5 μWs，当流速增加 50%时产生相同的电量。完成它的时间减少了 66.7%。
