頁籤選單縮合
題名 | 循環式乾燥機乾燥玉米粒之模擬與研究= |
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作者 | 馮丁樹; 王永明; |
期刊 | 農業工程學報 |
出版日期 | 19870300 |
卷期 | 33:1 1987.03[民76.03] |
頁次 | 頁32-44 |
分類號 | 434.149 |
語文 | chi |
關鍵詞 | 玉米粒; 乾燥; 乾燥機; 循環式; |
中文摘要 | 由於近年來玉米種植面積遽增,其產量將繼續增加,而本省地處亞熱帶,氣候潮濕,穀物不適久存,故對其收穫後之乾燥處理加以研究,實屬必要。 本研究目的旨在進行循環式乾燥方式之室內基本研究,並配合乾燥理論,建立循環式乾燥模式,再利用個人電腦以交談方式下執行,供乾燥機設計之參考或作業決策之用。 國內、外有關乾燥理論,論述甚多,本文乃擇其適用於循環式乾燥系統者,加以整理分析,再綜合筆者自身見解擴充成為本模式,並以室內基礎試驗、現場測試及廠商之循環乾燥機性能測定數據分別加以驗證。 研究結果證實本模式之預測值與實際試驗值相當接近。針對模擬結果加以分析可得: 1.提高熱風溫度、增加風量率或減少穀層厚度,均可提高減乾率。 2.在影響乾燥速率諸因子中,以熱風溫度最具決定性。 3.模擬時之穀層厚度會影響結果正確性,每層以不超過0.2呎最佳。 4.均化確實可消除水分梯度、溫度梯度,因而可提高穀物在乾燥期間之減乾率。 |
英文摘要 | The Taiwan climates are almost hot and wet throughout the whole year. Under the circumstances, a study on drying process of shelled corn becomes necessary as both corn production and yield are increasing in recent years. The purposes of this study are to make basic studies on a circulating drying system, in cooperating with an appropriate drying theory to construct a circulating drying model, and to use personal computer to write an interactive program, which can be useful for dryer designs and project researches. Several laboratory tests have been conducted in this study to examine the built model. Field tests on commercial driers of circulating type are also performed. Data shows that the drying model is very dependable and can be used under different drying conditions. The analysis of the model leads to the following conclusions: 1.As the drying temperature and/or airflow rates increase, or the grain column thickness decreases, the process will obtain a higher drying rate. 2.The hot air temperature is the most important factor that influences drying rate. 3.An optimum depth of each divided grain layer used during simulation shall not be grater than 0.2 foot (6cm). 4.A long tempering period would definitely affect the drying process as it is observed faster as the period for tempering increases. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。