整合太陽及風能進行焦電元件獵能之設計

焦電元件受時間相依之溫度變化導致產生輸出電性，太陽輻射和廢熱為豐富之熱能源。焦電層之時變溫度率經熱輻射轉化為電能，提供一種能源轉換技術。此外，焦電儲能的巨大挑戰在於不同熱源溫度及升降溫週期之條件下，探討焦電獵能元件效率之最佳頻率。因此，本研究設計一新穎整合太陽能與風力雙能源之焦電獵能系統。以太陽之輻射為熱源，風為動能。盤型發電機為主要風力獵能元件，以盤形發電機之轉動及旋轉能量驅動遮板，並藉由行星齒輪系統使焦電元件產生時變溫度率。焦電元件其最佳週期為35秒，其儲存能量達70 μJ，而盤型發電機轉速為31RPM和風速為1m/s。於此狀態下，焦電與盤型發電機儲能之差佔盤型發電機之75％。盤型發電機於較小風速下，不存在相輔相成之作用，雖焦電元件之儲能比盤型發電機較少，焦電元件與盤型發電機形成互補之作用，已產生輸出電性。

關鍵字

綠色能源；鋯鈦酸鉛；風力；太陽能；時變溫度率；焦電元件

並列摘要

Pyroelectric harvesters use temperature fluctuations to generate electrical outputs. Solar radiation and waste heat are rich energy sources that can be harvested. Pyroelectric energy converters offer a novel and direct energy-conversion technology by transforming time-dependent temperatures directly into electricity. Moreover, the great challenge for pyroelectric energy harvesting lies in finding promising temperature variations or an alternating thermal loading in real situations. Hence, in this article, a novel pyroelectric harvester integrating solar radiation with wind power by the pyroelectric effect is proposed. Solar radiation is a thermal source, and wind is a dynamic potential. A disk generator is used for harvesting wind power. A mechanism is considered to convert the rotary energy of the disk generator to drive a shutter for generating temperature variations in pyroelectric cells using a planetary gear system. The optimal period of the pyroelectric cells is 35 s to harvest the stored energy, about 70 μJ, while the rotary velocity of the disk generator is about 31 RPM and the wind speed is about 1 m/s. In this state, the stored energy acquired from the pyroelectric harvester is about 75% more than that from the disk generator. The pyroelectric harvester plays a complementary role when the disk generator is inactive in situations of low wind speed. Although the generated energy of the proposed pyroelectric harvester is less than that of the disk generator, the pyroelectric harvester plays a complementary role, cooperating with the disk generator to generate the electrical output.

並列關鍵字

Green energy ； Lead Zirconate Titanate ； Wind ； Solar ； Time change rate of temperature ； Pyroelectric element

參考文獻

[48] 簡榮富著，2014，COMSOL Multiphysics 有限元素分析快易通，皮托科技股份有限公司。

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整合太陽及風能進行焦電元件獵能之設計

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