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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 陳佳堃 | zh_TW |
| dc.contributor.advisor | Jia-Kun Chen | en |
| dc.contributor.author | 楊哲睿 | zh_TW |
| dc.contributor.author | Jhe-Ruei Yang | en |
| dc.date.accessioned | 2025-09-19T16:16:07Z | - |
| dc.date.available | 2025-09-20 | - |
| dc.date.copyright | 2025-09-19 | - |
| dc.date.issued | 2025 | - |
| dc.date.submitted | 2025-08-05 | - |
| dc.identifier.citation | 參考文獻
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/99909 | - |
| dc.description.abstract | 隨著氣候變遷與禽流感的頻繁發生，現行畜牧政策推動將風險較高之傳統開放式雞舍改為水簾密閉式設計，雖有助於提升雞舍內部生物安全，卻可能因外部風場干擾導致污染物回流至雞舍內部，威脅工作者之職業健康與禽隻健康。因此本研究旨在探討密閉式水簾雞舍在環境風向與雞舍排氣方向相反時，污染粒子於雞舍外之流場結構與粒子分布行為，並分析不同排氣改善設計與水簾開啟條件對於粒子再進入（re-entry）風險與職業健康風險之影響。本研究採用計算流體力學模擬技術，建構三種不同排氣設計（水平排氣、水平排氣有擋風牆、向上排氣）與兩種進氣水簾配置（只開啟正面水簾與三面水簾全開），共六組模擬模型。模擬中設定三種粒徑（2.5 μm、10 μm 及 100 μm）進行粒子研究，並觀察粒子之分布熱區評估再進入風險及雞舍外暴露風險。研究結果顯示，粒子受流場影響容易集中沉積於排氣口、水簾表面、建築兩側地面與屋頂等沉積熱區，增加牧場區內之粒子暴露風險，而在綜合評估下最理想之設計改善為水平排氣加擋風牆設計，不僅較符合現行法規，也較達到實際使用情況與污染控制的實務需求間之平衡。此外，針對粒子沉積熱區，應實施定期清消作業，並配合個人防護以降低粒子濃度與健康風險。綜合研究結果顯示，排氣設計、水簾開啟條件與環境風場三者交互影響粒子行為與再進入風險。未來禽舍設計應整合考量污染控制、設施維護與職業健康，以實現更安全、永續之畜禽養殖場域管理策略。 | zh_TW |
| dc.description.abstract | With the rising frequency of climate change and avian influenza outbreaks, current livestock policies are promoting the transition from traditional poultry houses to enclosed water-pad poultry houses While improving internal biosecurity, these designs may also increase the risk of pollutant re-entry due to interference from atmospheric wind, posing health risks to both workers and poultry. This study uses Computational Fluid Dynamics simulations to examine particle behavior around enclosed water-pad poultry houses when external wind opposes exhaust flow. Six models were constructed by combining three exhaust configurations (horizontal, horizontal with windbreak wall, and upward) with two water pad setups (front-only and fully open). Particles of 2.5 μm, 10 μm, and 100 μm were analyzed for adhesion hotspots and re-entry risk. Results showed that airflow interference leads to particle accumulation at key locations such as the exhaust outlet, water pad surfaces, building sides, and rooftops, increasing external exposure risks. Among all designs, the horizontal exhaust with windbreak wall offered the most balanced solution. Regular disinfection and use of personal protective measures to reduce health hazards, alongside additional dust control devices. In conclusion, exhaust configuration, inlet conditions, and wind direction collectively influence particle dispersion and re-entry risks. Future poultry house design should integrate pollution control, maintenance, and occupational health strategies to achieve safer and more sustainable livestock operations. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2025-09-19T16:16:07Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2025-09-19T16:16:07Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | 誌謝 i
摘要 ii Abstract iii 目次 iv 圖次 vii 表次 x 縮寫說明 xi 符號說明 xii 第一章 前言 1 1.1 研究動機與目的 1 1.2 文獻回顧 2 1.2.1 禽舍排出之汙染物 2 1.2.2 粒徑特性 3 1.2.3 不同形式之雞舍 3 1.2.4 橫風噴流 4 1.2.5 再進入 4 第二章 研究方法與材料 5 2.1 現場量測 6 2.1.1 幾何尺寸 6 2.1.2 風扇風速量測 7 2.1.3 水簾風速量測 8 2.1.4 現場環境風速 13 2.2 統御方程式 15 2.2.1 質量守恆定律 15 2.2.2 動量守恆定律 15 2.2.3 粒子軌跡方程式 16 2.3 模型設計 17 2.3.1 排氣設計 17 2.3.2 網格獨立 18 2.3.3 計算域 19 2.4 初始條件與邊界條件 20 2.4.1 環境風速設定 20 2.4.2 風扇排氣速度及水簾進氣速度設定 21 2.4.3 壁面條件 22 2.4.4 各模型邊界條件設置 22 2.4.5 微粒設定 24 第三章 結果 25 3.1 不同瞬間下流場差異 25 3.1.1 Model-SHW流場差異 25 3.1.2 Model-SH流場差異 27 3.1.3 Model-SV流場差異 29 3.2 牧場區內不同條件之粒子分布區域 31 3.2.1 只開啟正面水簾 31 3.2.2 水簾全開 33 3.3 牧場區外不同條件之粒子數比較 36 3.4 主要沉積區域粒子分布與速度分布 37 3.4.1 只開正面水簾之比較 37 3.4.2 水簾全開之比較 51 第四章 討論 65 4.1 環境風與雞舍排氣方向所造成之汙染物分布 65 4.2 不同排氣設計之再進入風險與雞舍外暴露風險 66 4.3 不同模型下排放出牧場區外之粒子 67 4.4 排氣方向、設置擋風牆與水簾開啟條件對結果之影響 68 第五章 結論 70 參考文獻 73 附錄 76 附錄一 現場量測使用儀器 76 附錄二 模擬分析軟體 77 附錄三 網格獨立性 78 附錄四 風扇量測資料 79 | - |
| dc.language.iso | zh_TW | - |
| dc.subject | 密閉水簾雞舍 | zh_TW |
| dc.subject | 計算流體力學 | zh_TW |
| dc.subject | 粒子分布 | zh_TW |
| dc.subject | 再進入 | zh_TW |
| dc.subject | 大氣風場 | zh_TW |
| dc.subject | atmospheric wind field | en |
| dc.subject | pollutant re-entry | en |
| dc.subject | particle distribution | en |
| dc.subject | enclosed water-pad poultry houses | en |
| dc.subject | CFD | en |
| dc.title | 大氣風向與排氣方向相反條件下密閉水簾式雞舍尾端排氣設計對於汙染物再進入之影響:以雲林某雞舍為例 | zh_TW |
| dc.title | Impact of Exhaust Design at the End of an Enclosed Water-Pad Poultry Houses on Pollutant Re-Entry Under Opposing Wind Conditions: A Case Study in Yunlin | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 113-2 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.oralexamcommittee | 黃盛修;曾子彝 | zh_TW |
| dc.contributor.oralexamcommittee | Sheng-Hsiu Huang;Tzu-I Tseng | en |
| dc.subject.keyword | 計算流體力學,密閉水簾雞舍,大氣風場,再進入,粒子分布, | zh_TW |
| dc.subject.keyword | CFD,enclosed water-pad poultry houses,atmospheric wind field,pollutant re-entry,particle distribution, | en |
| dc.relation.page | 79 | - |
| dc.identifier.doi | 10.6342/NTU202503646 | - |
| dc.rights.note | 同意授權(限校園內公開) | - |
| dc.date.accepted | 2025-08-05 | - |
| dc.contributor.author-college | 公共衛生學院 | - |
| dc.contributor.author-dept | 環境與職業健康科學研究所 | - |
| dc.date.embargo-lift | 2028-08-01 | - |
| 顯示於系所單位： | 環境與職業健康科學研究所 | |
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