Control structure synthesis for operational optimization of mixed refrigerant processes for liquefied natural gas plant

Title
Control structure synthesis for operational optimization of mixed refrigerant processes for liquefied natural gas plant
Author(s)
이문용율리아말리아
Keywords
DESIGN; SYSTEMS
Issue Date
201407
Publisher
WILEY-BLACKWELL
Citation
AICHE JOURNAL, v.60, no.7, pp.2428 - 2441
Abstract
The best control structures for the energy optimizing control of propane precooled mixed refrigerant (C3MR) processes were examined. A first principles-based rigorous dynamic model was developed to analyze the steady-state and dynamic behaviors of the C3MR process. The steady-state optimality of the C3MR process was then examined in a whole operation space for exploring the feasibility of the energy optimizing control for possible control structures. As a result, the temperature difference (TD) between the warm-end inlet and outlet MR streams was exploited as a promising controlled variable to automatically keep the liquefaction process close to its optimum. The closed-loop responses were finally evaluated for every possible control structure candidate. Based on the steady-state optimality and the dynamic performance evaluation, several control structures with a TD loop were proposed to be most favorable for the energy optimizing control of the C3MR process. The proposed optimality approach can be applied to any natural gas liquefaction process for determining a proper controlled variable for optimizing operation. (c) 2014 American Institute of Chemical Engineers
URI
http://hdl.handle.net/YU.REPOSITORY/31485http://dx.doi.org/10.1002/aic.14430
ISSN
0001-1541
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공과대학 > 화학공학부 > Articles
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