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Title: | 水簾式雞舍室內環境與雞舍幾何關聯性之研究 Research on the Relationship between Indoor Environment and Layer House Geometry in Water-pad Type Layer House |
Authors: | Chia-Chi Hsu 許家齊 |
Advisor: | 陳佳堃(JIA-KUN CHEN) 陳佳堃(JIA-KUN CHEN | jkchen29@ntu.edu.tw | ), |
Keyword: | 水簾式雞舍,計算流體力學,通風, Water-pad type layer house,CFD,ventilation, |
Publication Year : | 2022 |
Degree: | 碩士 |
Abstract: | 本研究首先透過實地量測計算流體力學模擬,對兩千羽水簾式雞舍內的溫濕度、風速等環境參數及溫濕度指數進行調查,同時評估兩千羽規模之水簾式雞舍流場分佈狀況,探討蛋雞舍內部氣候條件和現有環境問題。接著,建立兩萬羽規模水簾式雞舍的幾何模型,並利用計算流體力學研究雞舍水簾幾何結構及風扇風速對室內溫度、風速及溫濕度指標的影響,並提出最佳化雞舍通風設計。根據現場量測結果顯示,在兩千羽規模之水簾式雞舍的前端溫度較低,並隨著距離而溫度逐漸上升,在尾端溫度突破31 oC,顯示尾端有熱累積的現象。此外,透過計算流體力學結果顯示現場的兩片式之水簾結構會導致雞舍內部速度不均勻之外,走道溫度與雞籠內部溫度也會有明顯差異;而在兩萬羽雞舍方面,透過計算流體力學模擬結果顯示,當風扇風速大於9 m/s時,加大風扇風速對降低溫度的效果有限,此外,單片水簾雖然對於走道風速及溫度能有效控制,但雞籠內部風速及速度皆相當低,不利於雞隻散熱及生活,而三面式水簾較單面式水簾有效提升雞籠內風速及降低雞籠內部溫度,並以側邊水簾為5公尺的狀況下(Model 4),在雞籠內部的速度及溫度皆有較好的表現,有益於幫助雞隻散熱。 This study firstly investigated the environment in the small water-pad type layer house through field measurement and computational fluid dynamics simulation, and discussed the existing environmental problems in the layer house. Then, the geometric model of the large-scale water-pad layer house was established, and the effects of the geometric structure of the water-pad and the fan speed on the indoor environment were studied by using computational fluid dynamics, and the optimal ventilation design of the layer house was proposed. According to the results, there is heat accumulation at the end of the small layer house and the two-piece water-pad structure will lead to uneven velocity and temperature in the layer house; In terms of large-scale layer houses, the Computational Fluid Dynamics(CFD) simulation results show that when the fan wind speed is greater than 9 m/s, fan speed has limited effect on reducing the temperature. In addition, the wind speed in the cage with one-sided water-pad is lower and the temperature is higher. Compared with the one-sided water pad, the three-sided water pad, espically when the length of side pad is 5 meters (Model 4), can effectively improve the wind speed and inhibit the internal temperature accumulation in the cages. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/84912 |
DOI: | 10.6342/NTU202202022 |
Fulltext Rights: | 同意授權(限校園內公開) |
metadata.dc.date.embargo-lift: | 2022-10-04 |
Appears in Collections: | 環境與職業健康科學研究所 |
Files in This Item:
File | Size | Format | |
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U0001-0308202218253800.pdf Access limited in NTU ip range | 6.86 MB | Adobe PDF | View/Open |
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