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題名 | 鋼皮圓筒倉儲存進口玉米通風之探討(1):預測溫度與冬春季試驗溫度之對照 |
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作 者 | 丁大璧; 蕭介宗; | 書刊名 | 農業工程學報 |
卷期 | 33:3 1987.09[民76.09] |
頁次 | 頁17-28 |
分類號 | 434.252 |
關鍵詞 | 冬季; 玉米; 春季; 通風; 進口; 溫度; 預測; 鋼皮圓筒倉; 儲存; |
語文 | 中文(Chinese) |
中文摘要 | 本研究以100噸的鋼皮圓筒倉散裝儲存進口玉米,探討強制通風時,外界空氣溫濕度影響倉內玉米溫度變化的情形。 本實驗限於現有設備採用0.327³/min.ton的送風率以自下往上送風方式進行通風作業,於儲存玉米溫度達到35℃以上,外界空氣相對濕度低於80%啟動風機通風,當外界空氣相對濕度高於80%即關閉風機。 由下往上通風時,玉米溫度的變化由下層、中層而上層各有一主要的降溫時期,因此實行強制通風作業時,務必等上層玉米經歷過降溫的主要時期以後,才能確切發揮降溫的效果。 本文推演的玉米通風程式應用在預測鋼皮圓筒倉儲存玉米的通風作業,其結果顯示預測值與測量值略有溫度差異及相位差,這可能是由於太陽幅射熱能,霉菌昆蟲在穀倉的分佈狀態,玉米本身的呼吸熱受溫度的影響,玉米溫度的均勻度,通風管道安置狀況和較大通風量等所造成的綜合影響。 |
英文摘要 | This paper is to study the effect of ambient air temperature and humidity on the temperature changes of shelled corn stored in a 100 tons steel tank with aeration. This aeration experiment adopted an existing facility with an 0.327m³/min.ton airflow rate and an upward pressured type. The fan was operated under the air having a relative humidity below 80﹪ and the stored shelled corn having a temperature higher than 35℃. As aerating from the bottom to the top, changes of corn temperature keep a major cooling period from the bottom, the middle and the top layer. Therefore, for the best result, the aeration time must be long enough to let the corn temperature at the top layer through the major cooling period. During the aeration, the temperature of shelled corn stored in the steel tank can be predicted by the developed equations. The difference between the predicted and the measured temperature may be due to the total effects of solar radiation, fungi, and insects distribution, heat of corn respiration affected by temperature, uniformity of corn temperature distribution, aeration duct layouts, and larger airflow rate. |
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