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頁籤選單縮合
題名 | An RTD Determination Method for Extrusion Cooking=擠壓加工中測定物料滯留時間分佈之研究 |
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作者 | 彭錦樵; | 書刊名 | 農林學報 |
卷期 | 43:2 1994.06[民83.06] |
頁次 | 頁21-36 |
分類號 | 434.251 |
關鍵詞 | 米穀粉; 雙軸擠壓機; 滯留時間分佈; 比色計法; Rice flour; Twin-screw extruder; Residence time distribution; Colorimetric method; |
語文 | 英文(English) |
中文摘要 | 比色計法被用來研究米穀粉在雙軸擠壓機(APV Baker MPF50/25)內滯留 時間之分佈情形。本研究使用兩種方式來計算滯留時間之分佈情形,其一是直接 以比色計測得的紅色值來計算,其二是將紅色值轉換成濃度來計算。由結果顯 示,此兩種不同方式研究物料在擠壓機內之滯留時間分佈,有顯著之差異。利用 比色計測得的紅色值直接計算物料在擠壓機內文平均滯留時間,會比實際值大 (亦即會超估),因之,利用濃度來計算擠壓機內物科之滯留時間是唯一正確之方 式。 |
英文摘要 | A colorimetric method was used to study the residence time distribution (RTD) in anAPV Baker MPF 50/25 twin-screw extruder using rice flour as the feed material. The redness color value and the concentration approaches were used to determine the RTD of riceflour in the extruder. There was significant difference between the two approaches, and itwas found that using the redness color values from a colorimeter directly to study the RTDtended to overestimate the mean residence time and the RTD spread. The concentrationapproach is the only valid and correct method for RTD measurement in a twin-screw extrusion cooking system. |
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