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Nonlinear Modeling and Application of PI Control on Pre-cooling Session of a Carbon Dioxide Storage Tank at Normal Temperature and Pressure
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  • Journal title : Korean Chemical Engineering Research
  • Volume 52, Issue 5,  2014, pp.574-580
  • Publisher : The Korean Institute of Chemical Engineers
  • DOI : 10.9713/kcer.2014.52.5.574
 Title & Authors
Nonlinear Modeling and Application of PI Control on Pre-cooling Session of a Carbon Dioxide Storage Tank at Normal Temperature and Pressure
Lim, Yu Kyung; Lee, Seok Goo; Dan, Seungkyu; Ko, Min Su; Lee, Jong Min;
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Storage tanks of Carbon dioxide () carriers utilized for the purpose of carbon capture and storage (CCS) into subsea strata have to undergo a pre-cooling session before beginning to load cryogenic liquid cargos in order to prevent physical and thermal deterioration of tanks which may result from cryogenic contacting tank walls directly. In this study we propose dynamic model to calculate the tank inflow of gas injected for precooling process and its dynamic simulation results under proportional-integral control algorithm. We selected two cases in which each of them had one controlled variable (CV) as either the tank pressure or the tank temperature and discussed the results of that decision-making on the pre-cooling process. As a result we demonstrated that the controlling instability arising from nonlinearity and singularity of the mathematical model could be avoided by choosing tank pressure as CV instead of tank temperature.
CCS; Carrier; Storage Tank;Pre-cooling;
 Cited by
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