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題 名 | Frequency Response Analysis in Continuous Bioreactor with Time Delay Growth Model=連續式生化反應器中時間延滯成長模式之頻率應答 |
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作 者 | 吳聲祺; 劉懷勝; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷 期 | 34:5 2003.09[民92.09] |
頁 次 | 頁555-562 |
分類號 | 460.021 |
關鍵詞 | 連續式生化反應器; 時間延滯成長模式; Frequency response; Continuous bioreactor; Time delay model; |
語 文 | 英文(English) |
中文摘要 | 雖然Monod成長模式下最適穩態操作之平均細胞產量優於週期式操作,然而在時間延滯的情況下,週期式操作可獲得較高的產量。因此本研究以頻率應答的方式,對於此二種情況基以理論分析並加以比較。在波氏圖下兩者表現顯著不同,特別是在斷點。對於無時間延滯模式,斷點之振幅比與低頻漸進線之垂直距離總是log(√2),然而對於時間延滯模式則非如此。除此之外,無時間延滯模式之波氏圖為單調遞減函數,從水平之低頻率漸進線轉變成斜率為-1之高頻率漸進線。然而對於時間延滯模式,雖然兩漸進線斜率不變,但中間有個突起。據此可用以判定系統是否屬於時間延滯型模式,並可由此獲得參數,用於模擬動態生化程序。 |
英文摘要 | Although the performance of Monod growth model is always better at its optimal steady state, forced cycling is superior for the Monod growth accompanied with time delay. In this article, frequency response (FR) method for both cases was analyzed and compared theoretically. Significant difference in the Bode diagram was noticed, especially around the breakpoint frequency point. That is, for Monod model without time delay, the vertical distance between amplitude ratio (AR) and low frequency asymptote is always equal to log(√2) at breakpoint frequency. However, it is not a valid statement for the case accompanied with time delay. In addition, the Bode diagram is a monotonically decreasing curve, shifting from horizontal low frequency asymptote to high frequency asymptote of slope-1 for Monod growth without time delay. However, for the delay model, there is a “hump” while the slopes to two asymptotes remain the same. According this, the procedure of identifying typical time delay model and determining time delay constant is established and the results can be used to model the dynamic bioreactor. |
本系統中英文摘要資訊取自各篇刊載內容。