液滴發電器的發電參數分析與模型建置

Abstract

為了解液滴發電器在不同條件下的發電效率，本研究比較了示波器在不同取樣頻率記錄到的電壓值、評估計算電功率的方法以及進行所有不同參數組合的實驗，並藉以建立液滴發電器的測量方式的標準流程。本研究製備多種不同介電層厚度的液滴發電器，透過不同濃度的液滴滑落液滴發電器以產生電力，且改變液滴墜落高度後，結果顯示液滴接觸面積與峰值電壓有正相關性。在固定液滴發電器傾斜角度的情況下，結果顯示當介電層厚度在100µm與液滴濃度為1mM的時，液滴發電器有最高的平均電功率，若是厚度與濃度持續上升，會導致功率下降。本研究亦串聯不同大小的電阻於示波器上作為負載，尋找液滴發電器的阻抗匹配結果。本研究基於液滴發電器的電壓訊號，代入不同實驗參數，建立一套簡易的發電模型，用以模擬液滴發電器的發電過程。

To understand the power generation efficiency of a droplet-based electricity generator (DEG) under various conditions, this study compared the voltage recorded by the oscilloscope at different sampling frequencies, evaluated different methods for calculating power, and conducted experiments across all parameters to establish a standardized measurement procedure for the DEG. Several droplet-based electricity generators with different dielectric layer thicknesses were fabricated. Electricity was generated by droplets of various concentrations sliding down the DEGs, and the results showed a positive correlation between the droplet’s contact area and the peak voltage when the droplet impacted the surface at different falling heights. Under a fixed tilt angle of the DEG, the results showed that we got the highest average power when the dielectric layer thickness was 100µm and the droplet concentration was 1mM. Further increases in dielectric layer thickness and droplet concentration led to a decrease in power. By connecting resistors of different sizes in series to the oscilloscope as a load, the impedance matching result of the DEG could be determined. Furthermore, based on the voltage signal of the DEG, a simple power generation model was established by substituting different experimental parameters to simulate the power generation process of the DEG.