頁籤選單縮合
題名 | 乳牛舍風扇配置對動物佔據區空氣流之影響=Effect of Mixing Fan Installation on Airflow of Animal Occupation Zone for Dairy Barn |
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作 者 | 喻新; 王鼎盛; | 書刊名 | 農業工程學報 |
卷期 | 45:3 1999.09[民88.09] |
頁次 | 頁22-40 |
分類號 | 437.12 |
關鍵詞 | 通風; 風扇; 空氣流; 噴流; 動物佔據區; Ventilation; Fan; Airflow; Jet; Animal occupation zone; |
語文 | 中文(Chinese) |
中文摘要 | 乳牛舍在台灣夏季因受高溫環境之熱緊迫而哽壹量降低.以風扇通風造成動物 對流散熱為開放式乳牛舍主要之環境控制方法。但是如何決定風扇之配置方式以達 到最佳之通風與降溫效果,則須予以確定。本研究利用乳牛舍現場試驗,以確定風 扇在不同設置高度、對水平面不同傾角時之通風效果。由實驗結果顯示,風扇高度 在260cm至350cm之間變化時,風扇傾角在10°至30°之間變化可得到較大之地 面風速及較大之適宜風速(0.5m/s至1.0m/s)涵蓋面積。此外,實驗之地面風速與 噴流理論模擬之地面風速相當一致,顯示風扇所造成之流場可以理論模擬。未來應 以機械通風設備配合蒸發降溫系統達到更有效改善乳牛舍夏季高溫問題,風扇自動 控制系統及理論模式模擬可使乳牛舍環境管理朝向自動化與精確化。 |
英文摘要 | The milk yield of dairy decrease during the summer in Taiwan because of the heat stress. The method using mixing fan to form convection cooling of animals is the main environmental control technique in open-type dairy barn. The installation method of mixing fan should be concluded to reach the best ventilation and cooling efficiency. This project evaluated the efficiency of mixing fan with different height and inclined angle from horizontal by experiments in dairy barn. The results showed the maximum floor area-averaged velocity and the maximum covered area of appropriate floor airspeed (0.5m/s to 1.0m/s) existed while the variation of fan height between 260cm and 350cm with the inclined angle between 10° and 30°. The jet airflow field from mixing fan could be simulated by analysis method resulted in the coincidence between simulated floor airspeed and experimental data. Future study of using mechanical ventilation facility with evaporative cooling system to effectively improve the thermal environment during summer at dairy barn should proceed. Automatic control of mixing fan and theoretical simulation of airflow filed at dairy barn should also be induced. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。