TY - JOUR
T1 - Optimization of Multilayer Standby Mechanisms in Continuous Chemical Processes
AU - Chan, Sing Zhi
AU - Liu, Hung Yu
AU - Luo, Yi Kai
AU - Chang, Chuei Tin
N1 - Funding Information:
This work is supported by the Ministry of Science and Technology of the Taiwan government under grant 108-2221-E-006-149-.*%blankline%*
Funding Information:
This work is supported by the Ministry of Science and Technology of the Taiwan government under grant 108-2221-E-006-149-.
Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/2/5
Y1 - 2020/2/5
N2 - Every critical online unit in a continuous process must always function normally, and one or more identical units are usually put on standby to sustain the uninterrupted operation. Although a few related studies have been reported in the literature, a comprehensive analysis of the standby mechanism still has not been carried out. The objective of this research is to construct a generalized mathematical model to synthesize the multilayer standby mechanisms for any given processes by minimizing the total expected life cycle expenditure. A Matlab code can be developed accordingly to perform the required optimization tasks via a genetic algorithm. The feasibility and effectiveness of the proposed approach have been demonstrated with the case studies concerning the pump system in a typical chemical plant. From the optimization results, one can obtain the optimal design specifications of the multilayer standby mechanism, which include (1) the number of layers, (2) the numbers of both online and spare sensors in each measurement channel, (3) the corresponding voting-gate logic in each channel, (4) the inspection interval of a switch, (5) the number of spares for a switch, (6) the inspection intervals for warm standbys, and (7) the number of cold standbys.
AB - Every critical online unit in a continuous process must always function normally, and one or more identical units are usually put on standby to sustain the uninterrupted operation. Although a few related studies have been reported in the literature, a comprehensive analysis of the standby mechanism still has not been carried out. The objective of this research is to construct a generalized mathematical model to synthesize the multilayer standby mechanisms for any given processes by minimizing the total expected life cycle expenditure. A Matlab code can be developed accordingly to perform the required optimization tasks via a genetic algorithm. The feasibility and effectiveness of the proposed approach have been demonstrated with the case studies concerning the pump system in a typical chemical plant. From the optimization results, one can obtain the optimal design specifications of the multilayer standby mechanism, which include (1) the number of layers, (2) the numbers of both online and spare sensors in each measurement channel, (3) the corresponding voting-gate logic in each channel, (4) the inspection interval of a switch, (5) the number of spares for a switch, (6) the inspection intervals for warm standbys, and (7) the number of cold standbys.
UR - http://www.scopus.com/inward/record.url?scp=85079760762&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85079760762&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.0c00233
DO - 10.1021/acs.iecr.0c00233
M3 - Article
AN - SCOPUS:85079760762
SN - 0888-5885
VL - 59
SP - 2049
EP - 2059
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 5
ER -