不同LED光源在圓柱槽內之光強度實驗量測

Light Intensity Measurement of Different LED Lights in Cylindrical Tank

李品賢(Pin-Hsien Lee)

指導教授 ： 周榮源

共同指導教授 ： 徐烱勛

國立虎尾科技大學/工程學院/機械與機電工程研究所/碩士(2013年)

摘要

光合菌是最有效率之氫氣生產者，其亦可將二氧化碳當做培養之碳源。為了瞭解不同介質 (空氣、水及具氣液混合) 對光合菌產氫效能的影響，本文分別以3種發光二極體（LED）紅光、白光、藍光，來模擬不同LED光源對圓柱槽體內部光合菌照光的影響。並選用業界常用之圓柱槽，在槽體內注入不同模式，來探討LED光強度的分布。本研究發現光源在水介質的照度及光量子為本文探討之三種介質中最強，其次為氣液混合及空氣介質。三種光源之照度由大至小分別為:白光、藍光、紅光，此外三種光源之光量子由大至小分別為:紅光、白光、藍光。除照度光衰之紅光部分情況較為不同，其餘光衰皆會隨著規律的趨勢下降，並不會隨著瓦數增加而隨之波動。本論文實驗結果顯示，氣液混合介質光強度略低於水介質光強度，但兩者差距甚小，故本研究建議後續進行類似產氫實驗時，可以考慮使用氣液混合介質，其氣泡不僅提高氧氣產生，更達到產氫目的及涵養水中藻類，對藻類生長有益，必定能使產氫技術更上一層樓。

關鍵字

光強度 ； LED光源 ； 圓柱槽 ； 實驗量測

並列摘要

Photosynthetic bacteria are the most efficient producers of hydrogen, which can be cultured as carbon dioxide. In order to understand the effects of photosynthetic bacteria in different media (air, water, and a gas-liquid mixture) for hydrogen production, three kinds of light-emitting diode lights, red, white, and blue, respectively, are used to simulate light intensity in the space of cylindrical tank where photosynthetic bacteria are cultured inside. And different flow rates of air are injected to explore the LED light intensity distribution in the tank space. In this study, for the three media, the illumination and light photon flux in the aqueous medium are the highest, followed by in the gas-liquid mixture, then in the air medium. If light sources of red, white, and blue are altered sequentially, the illumination values from large to small are in the sequence of white, blue, red, respectively; in additionally, light photon fluxes from large to small are in the sequence of red, white, blue, respectively. Considering the illumination problem, red light fades situation is more different from the rest of the light fades will increase with the downward trend in the law, and does not change with the increase in wattage. In this thesis, illumination experimental results show that the values in gas-liquid mixing medium are slightly lower than in the aqueous medium, but the difference is not significant. Therefore, it is conclued that, for subsequent experiment for hydrogen production, using the gas-liquid mixed media is proper because the bubble will not cause great light fades to light and will increase the mixing effects in the cultivation container, hence, it will be beneficial for the growth of algae and to improve the efficiency of hydrogen production purposes.

並列關鍵字

light intensity ； LED lights ； cylindrical tank ； experimental measurement

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