製備藻類衍生物碳點與 Mxene複合材料並應用高效超級電容
本研究運用綠藻、螺旋藻、卡拉膠(k,i,λ)進行製備碳點並應用高效超級電容。本實驗已完成綠藻、螺旋藻、卡拉膠( k,i,λ)在不同的pH值中的溶解度測試,並找出綠藻、螺旋藻、卡拉膠(k,i,λ)各自適合溶解的溫度及溶液。此外,中途也已透過文獻中的實驗證實我們實驗中所運用的電化學實驗設計及裝置可以成功製備出碳點。而在電化學製備碳點的部分目前完成單獨藻類、藻類加histidne的電擊實驗以及測其吸收光譜,也運用先前製備出較穩定的碳點加入MXene進行電化學分析,透過碳點擴大MXene分層,以達到增加MXene電化學效能的效果。最後,預計之後將進行更多的電化學分析,進一步地確認碳點結合MXene能在超級電容的應用。
Development and Comparison of a Small-Scale Toroidal Horizontal-Axis Wind Turbine to a Conventional HAWT Design
Wind energy is one of the most promising and rapidly growing sources of renewable energy, although maximizing its efficiency while minimizing noise remains a challenge and limits its widespread adoption. The emergence of toroidal propellers, which have gained popularity for producing comparable thrust levels to traditional drone propellers while producing less noise, could mitigate this. This study aimed to develop a small-scale toroidal HAWT and compare its power and noise output to a conventional rotor design under similar wind velocity conditions. 15-centimeter diameter models of the toroidal and conventional rotors were created in Fusion 360 and simulated using Ansys Fluent to identify the significant aerodynamic characteristics that positively affect the blades’ power coefficient. The toroidal design with the greatest simulated power output at low tip speed ratios (TSRs) was then 3D printed and physically tested in a wind tunnel against the control rotor. The experimental results confirmed that the toroidal design had greater power coefficients at lower TSRs compared to the control rotor. The toroidal rotor started operating at a wind velocity of 3 m/s compared to the control rotor’s 6 m/s, which indicates superior start-up characteristics. While the toroidal rotor produced half the power output of the control at the highest tested wind speed of 7 m/s, it emitted 18 decibels less noise and showed a reduction in discernible noise between frequencies of two to five kilohertz. The results from this study show its potential in low-noise wind turbines within low-wind velocity environments.