應用光學導納軌跡法提升太陽能選擇性吸收膜之光熱轉換效率研究

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姓名

陳煜升(Yu-sheng Chen) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

應用光學導納軌跡法提升太陽能選擇性吸收膜之光熱轉換效率研究
(Enhancing photo-thermal conversion efficiency of solar selective absorber by optical admittance loci)

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摘要(中)

在聚光型太陽熱能發電系統(concentrating solar power system, CSP)中，太陽能選擇性吸收膜是提升光熱轉換效率的關鍵，本實驗利用導納軌跡法的概念設計金屬-介電質堆疊的結構，形成在太陽能波段有廣波域的吸收以及紅外線波段低發射率的高效率的吸收膜。材料使用Nb2O5、SiO2、Mo，並搭配橢圓儀、穿透光譜對材料的光學常數進行分析。
膜層結構:Substrate/ Mo / Nb2O5/ Mo/ Nb2O5/ SiO2，設計在太陽能波段400~1200nm的吸收率有98%以上，在溫度300K~600K的發射率可以在10%以下。實際製作的結果在400~1200nm波段的吸收率也可達97%以上，在溫度300K~600K的發射率在8%~12%。在後續的熱穩定性測試中，膜層經過500℃的烘烤後吸收率提升0.24%。

摘要(英)

In concentrating solar power system, Solar selective absorber is the key of enhancing photo-thermal conversion efficiency. In this research, we design metal-dielectric stack structure base on optical admittance loci, and the structure has broadband absorption in solar energy region and low emissivity in infrared region. The metal layer is Mo, and the dielectric layers are Nb2O5 and SiO2. Also, we use ellipsometer and transmittance spectrum to analyze the optical constant of materials.
The structure Substrate/ Mo / Nb2O5/ Mo/ Nb2O5/ SiO2 is designed to have absorption higher than 98% in solar energy spectrum of 400~1200nm and emissivity lower than 10% in infrared region at the temperature of 300K~600K. The fabrication result also has absorption higher than 97% and emissivity about 8%~12%. Then, the solar selective absorber has also shown a good thermal stability up to the temperature of 500℃ and the absorption has risen 0.24%.

關鍵字(中)

★ 太陽能選擇性吸收膜
★ 光學導納軌跡法
★ 金屬-介電質堆疊

關鍵字(英)

★ Solar selective absorber
★ optical admittance loci
★ metal-dielectric stack

論文目次

摘要 I
Abstract II
致謝 III
目錄 IV
圖目錄 VI
表目錄 IX
第一章緒論 1
1-1 前言 1
1-2 論文架構 3
第二章太陽能選擇性吸收膜係與光學薄膜理論[18] 4
2-1 太陽能選擇性吸收膜表面原理 4
2-2 單層膜之反射與透射 8
2-3 導納軌跡法 11
2-3-1 單層膜之導納軌跡 11
2-3-2 金屬膜之導納軌跡 13
第三章實驗方法及設備 16
3-1 實驗流程 16
3-2 反應式直流(DC)脈衝磁控濺鍍 16
3-3 橢圓偏振儀 18
3-4 可見光-近紅外光譜儀 20
3-5 霍氏轉紅外光譜儀(Fourier-Transform Infrared Spectrometer, FTIR) 20
3-6 Macleod光學模擬軟體 20
第四章太陽能選擇性吸收膜設計與製作 22
4-1 太陽能選擇性吸收膜設計 22
4-2太陽能選擇性吸收膜製作與分析 34
4-2-1單層膜鍍製與光學常數分析 35
4-2-2太陽能選擇性吸收膜製作 43
4-2-3太陽能選擇性吸收膜的製程參數與結果 45
4-2-4 探討模擬與製作結果的差異性 47
4-3 吸收膜熱穩定性測試 49
第五章結論與未來展望 51
Reference 53

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指導教授

陳彥宏、郭倩丞(Yen-Hung Chen Chien-Cheng Kuo)

審核日期

2014-8-11

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