出版日期：2006-01-01 00:00:00

著者：Hung, Chia-tsung; Chen, Yih-hang; Jeffrey D. Ward; Yu, Cheng-ching

單位：淡江大學化學工程與材料工程學系

出版者：American Chemical Society

著錄名稱、卷期、頁數：Industrial & Engineering Chemistry Research 45(25), pp.8664-8677

摘要：We explore the dynamics and control of plants with recycle and multiple feed streams under different process designs, taking as an example a ternary system with a second-order irreversible reaction: A + B f 2C. Process transfer function matrices are derived analytically in terms of design variables. It is shown analytically that plants with recycle and multiple feeds are internally unstable systems with a pole at the origin, thus proving Luyben’s conjecture that reactant feed flow rates must be balanced down to the last molecule. Therefore, a feed-ratio control scheme will not work in practice; one of the feed flows must be adjusted via feedback. Remaining candidate control structures are evaluated using linear and nonlinear analysis. Finally, dynamic compensation of the feed flow is applied such that almost perfect production rate control is achieved. Simulation results clearly indicate that the correct control structure can be selected and that almost perfect production rate changes can be achieved.

語言：en

ISSN：1520-6882

期刊性質：國內

審稿制度：否

國別：TWN

出版型式：電子版