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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/30006完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 郭景宗 | |
| dc.contributor.author | chang Yao-Chung | en |
| dc.contributor.author | 張耀中 | zh_TW |
| dc.date.accessioned | 2021-06-13T01:30:12Z | - |
| dc.date.available | 2009-07-18 | |
| dc.date.copyright | 2007-07-18 | |
| dc.date.issued | 2007 | |
| dc.date.submitted | 2007-07-13 | |
| dc.identifier.citation | [1]. Reed, T. B. et. (1983) A mathematical model for stratified downdraft gasifier. Solar energy research institute. pp. 410-420
[2]. Reed, T. B. and Markson, M. (1985) Biomass Gasification reaction velocity. Solar energy research institute. pp. 355-365 [3]. Barrio, M. et. (2001) Operational Characteristcs of a Small-Scale Stratified Downdraft Gasifier. Sixth international conference on Tchnologies and Combustion for a Clean Environment. vol. 3 pp.1269-1276 [4]. Di Blasi, C. et. (1999) Countercurrent Fixed-bed gasification of biomass at laboratory scale. Industrial and Engineering Chemistry Research. pp. 2571-2581 [5]. Kuo, J. T. (1998) Estimation of burning rate in solid waste combustion furnaces. Combust. Sci and Tech., Vol. 137, pp. 1-29 [6]. M. Dogru, C. R. Howarth, G. Akay, B. Keskinler, A. A. Malik (2002) Gasification of hazelnut shells in a downdraft gasifier. Energy. pp. 415-427 [7]. Lopamudra Devi, Krzysztof J. Ptasinski, Frans J. J. G. Janssen (2003) A review of the primary measures for tar elimination in biomass gasification processes. Biomass and Bioenergy. pp. 125-140 [8]. T.H.Jayah, Lu Aye,R.J.Fuller,D.F.Stewart (2003) Computer simulation of a downdraft wood gasifier for tea drying. Biomass and Bioenergy. pp. 459-469 [9]. Frand Fiedler (2004) The state of the art of small-scale pellet-based heating systems and relevant regulations in Sweden, Austria and Germany. Renewable and sustainable energy reviews. pp. 201-221 [10]. Z. A. Zainal, Ali Rifau, G. A. Quadir, K. N. Seetharamu (2002) Experimental investigation of a downdraft biomass gasifier. Biomass and Bioenergy. pp. 283-289 [11]. S.C. Bhattacharya et.(2001) A study on a multi-stage hybrid gasi er-engine system.Biomass and Bioenergy 445–460 [12]. R.C. Saxena et. (2007) Thermo-chemical routes for hydrogen rich gas from biomass: A review. Renewable and Sustainable Energy Reviews. pp.1-19 [13]. Y. B. Yang, (2004) Effect of air flow rate and fuel moisture on the burning behaviours of biomass and simulated municipal solid wastes in packed beds. fuel. pp.1553–1562 [14]. Welker,J.R.(1970) The Pyrolysis and Ignition of Cellulosic Materials：A Literature Review. Journal of fire and Flammability,1,12-29. [15]. 蔡尚貿，「下抽式木質燃料空氣氣化爐操作條件對產氣狀況之影響研究」,國立台灣大學，碩士論文，民國九十三年。 [16]. 劉秋豪，「向下氣流式木質燃料空氣氣化爐之空氣輸配及進料控制對產氣狀況之影響研究」,國立台灣大學，碩士論文，民國九十四年。 [17]. 李永文,「小型生質燃料氣化爐設計製造與性能測試」,國立台灣大學，碩士論文，民國九十一年 [18]. Hsi, C.L., Wang, T.Z., Liu, C.H., Chang, Y.C., and Kuo, J.T. (2007) Performance Analysis of a Fixed-bed Downdraft Biomass Gasifier. The 17th National Conference on Combustion, The Combustion Institute of R.O.C., March 31, Taipei, Taiwan | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/30006 | - |
| dc.description.abstract | 生質是一種重要永續能源，它的主要來源為廢竹木及收成後之農作物根莖與穀殼和水生植物等，使用生質當燃料來發電可減少地球溫室氣體的排放。本實驗之向下氣流式氣化爐可製造出低焦油量之乾淨產氣，適合可作為燃氣引擎與為渦輪機等之燃料。因此，本研究以向下氣流式式氣化爐（高度1000mm與直徑200mm）來探討操作條件對產氣狀況之影響研究。
本氣化爐針對空氣流量、進料方式、上噴空氣、燃料種類、燃料含水量等變因，探討其燃料消耗率、產氣成份與熱值，經由本實驗可得知最佳操作範圍，當燃料供給率之範圍為9.至9.5 Kg/hr時，其最佳空燃比之範圍為2 至2.2之間；此時可輸出最佳之產氣熱值範圍為4.5至4.7 MJ/Nm3，且其產氣率範圍為20-23 Nm3/h。根據歷代爐子的比較結果可以得知,燃料水分進料與進氣控制與爐體保溫對於單位面積燃燒速率與產氣熱値影響很重大。 | zh_TW |
| dc.description.abstract | Biomass is an important renewable energy resource produced from trees, agriculture crops and aduatic plants. Using biomass as fuel for power generation is carbon neutral and helps to lower the emission of global warming gases. Downdraft gasifier is suitable for gas engine and micro turbine due to the fact that its producer gas contains low tar and clean producer gas. Therefore this downdraft gasifier with 1000mm height and 200mm diameter is used in this study to investigate the relations between quality of producer gas and operation conditions.
The effect of air flow rate, feeding manner, upper air feeding system, fuel kind and moisture content on the fuel comsuption rate, gas composition and calorific value is presented. The optimum operation of this gasifier is in the range of 9 to 9.5 Kg/h at air to fuel ratio between 2 and 2.2.The best range HHV of producer gas is 4.5 to 4.7 at producer gas flow rate between 20 and 22 Nm3/h. Comprehensive comparison on the performance of gasifier with the previous studies of our laboratory has been performed in this work. Results indicate that the moisture content of fuel, the feeding of fuel and air, as well as the insulation of the gasifier reactor are significant to the fuel conversion rate and producer gas heating value. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-13T01:30:12Z (GMT). No. of bitstreams: 1 ntu-96-R94522312-1.pdf: 2775010 bytes, checksum: c1329b0ca97af78b0d351436349295b3 (MD5) Previous issue date: 2007 | en |
| dc.description.tableofcontents | 口試委員審定書
誌謝 摘要 英文摘要 目錄 表目錄 圖目錄 符號說明 第一章 緒論 1 1-1 前言 1 1-2 研究動機 2 1-3 研究目的 2 1-4 文獻回顧 3 第二章 氣化爐理論基礎 7 2-1 氣化爐基本原理 7 2-1.1 乾燥區 8 2-1.2 熱解過程 9 2-1.3 燃燒區 9 2-1.4 氣化區 10 2-2 燃燒過程之理論分析 10 第三章 氣化爐設備與實驗步驟 13 3-1 氣化爐本體及週邊設備 13 3-1.1 氣化爐本體 14 3-1.2 進氣裝置 16 3-1.3 自動點火裝置 16 3-1.4 進料裝置 16 3-1.5 煙霧阻隔裝置 17 3-1.6 排灰裝置 18 3-1.7 冷卻裝置 18 3-1.8 燃料前處理設備 19 3-2 量測與分析設備 20 3-2.1 溫度量測系統 20 3-2.2 氣體採樣裝置 21 3-2.3 重量量測設備 21 3-2.4 氣體分析設備 21 3-3 進料步驟 23 3-4 實驗步驟 23 第四章 實驗結果與討論 25 4-1 實驗操作結果 25 4-1.1 風量實驗之操作結果 26 4-1.2 燃料尺寸實驗之操作結果 31 4-1.3 上噴空氣實驗之操作結果 32 4-1.4 燃料種類實驗之操作結果 34 4-1.5 燃料含水量實驗之操作結果 35 4-2 歷代氣化爐之結果比較與分析討論： 37 4-2.1 燃燒消耗率的結果討論 38 4-2.2 產氣成份與熱値的結果討論 39 4-3 其他爐子之結果討論 41 第五章 結論與建議 43 5-1 結論 43 5-1.1 風量實驗之結論： 43 5-1.2 上噴實驗之結論： 43 5-1.3 燃料尺寸實驗之結論： 44 5-1.4 燃料種類實驗之結論： 44 5-1.5 燃料含水量實驗之結論： 44 5-1.6 各種爐子比較之結論： 44 5-2 建議 45 參考文獻 86 | |
| dc.language.iso | zh-TW | |
| dc.title | 下抽式氣化爐之空氣進氣及投料系統改良設計對產氣狀況之影響研究 | zh_TW |
| dc.title | Effect of Air and Fuel Feeding System Improvement on Quality of Producer Gas of Downdraft Wood Gasifier | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 95-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 蔡建雄,許智倫 | |
| dc.subject.keyword | 生質,向下氣流式氣化爐, | zh_TW |
| dc.subject.keyword | biomass,downdraft gasifier, | en |
| dc.relation.page | 87 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2007-07-17 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
| 顯示於系所單位： | 機械工程學系 | |
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