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- In relation to this article, we declare that there is no conflict of interest.
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Received March 10, 2014
Accepted April 12, 2014
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상온 상압의 이산화탄소 저장용 탱크를 위한 예냉과정의 비선형 모델링 및 비례-적분 제어 적용
Nonlinear Modeling and Application of PI Control on Pre-cooling Session of a Carbon Dioxide Storage Tank at Normal Temperature and Pressure
서울대학교 화학생물공학부, 151-742 서울특별시 관악구 관악로 1 1(주)삼성중공업, 656-710 경상남도 거제시 장평3로 80
School of Chemical & Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea 1Samsung Heavy Industries, 80 Jangpyeong 3-ro, Geoje-si, Gyeongnam 656-710, Korea
jongmin@snu.ac.kr
Korean Chemical Engineering Research, October 2014, 52(5), 574-580(7), 10.9713/kcer.2014.52.5.574 Epub 1 October 2014
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Abstract
이산화탄소(CO2) 포집 및 지중저장을 위한 CO2 수송선용 저장탱크는 액체 CO2와 직접적으로 접촉할 경우 발생할 수 있는 물리적/열적 탱크 손상을 방지하기 위해 화물 선적 단계 이전에 예냉과정을 거쳐야 한다. 본 연구에서는 예냉을 위해 주입되는 저온 CO2 기체의 탱크 유입량을 계산하기 위해 CO2 저장탱크 예냉과정의 수학적 모델 식을 제안하였다. 또한 비례-적분(proportional-integral: PI) 제어를 통해 공정을 제어하는 동적 모사 결과를 제시하였다. 이 때 제어 변수를 탱크 내 온도 또는 압력으로 선정한 두 가지 사례를 모사하였으며 그러한 결정이 CO2 저장탱크의 예냉과정에 미치는 영향을 해석하였다. 결과적으로 예냉과정의 PI제어에는 탱크 내 온도를 제어하는 것보다 압력을 제어하는 우회적인 방식을 택할 때 수학적 모델의 비선형성과 특이점 발생으로 인한 불안정성을 피할 수 있으므로 더 안정된 결과가 도출됨을 보였다.
Storage tanks of Carbon dioxide (CO2) 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 CO2 contacting tank walls directly. In this study we propose dynamic model to calculate the tank inflow of CO2 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.
Keywords
References
Benson SM, Jr FMO, MRS Bulletin, 33, 303 (2008)
Feron PHM, Hendriks CA, Oil & Gas Science and Technology - Rev. IFP, 60(3), 451 (2005)
Jung J, Lim Y, Jeong YS, Lee U, Yang S, Han C, Korean Chem. Eng. Res., 49(6), 764 (2011)
Lee DH, Kim MH, Kwon SH, Kim JW, Lee YB, Ocean Engineering, 34(1), 3 (2007)
Shin MW, Shin D, Choi SH, Yoon ES, Korean J. Chem. Eng., 25(1), 7 (2008)
Dimopoulos GG, Frangopoulos CA, International Journal of Thermodynamics, 11(3), 123 (2008)
Kim HS, Shin MW, Yoon ES, “Optimization of Operating Procedure of LNG Storage Facilities Using Rigorous BOR Model,” 17th World Congress of the International Federation of Automatic Control, July, Seoul (2008)
Heestand J, Shipman CW, AlChE J., 29(2), 199 (1983)
Shin Y, Lee YP, Appl. Energy, 86(1), 37 (2009)
Feron PHM, Hendriks CA, Oil & Gas Science and Technology - Rev. IFP, 60(3), 451 (2005)
Jung J, Lim Y, Jeong YS, Lee U, Yang S, Han C, Korean Chem. Eng. Res., 49(6), 764 (2011)
Lee DH, Kim MH, Kwon SH, Kim JW, Lee YB, Ocean Engineering, 34(1), 3 (2007)
Shin MW, Shin D, Choi SH, Yoon ES, Korean J. Chem. Eng., 25(1), 7 (2008)
Dimopoulos GG, Frangopoulos CA, International Journal of Thermodynamics, 11(3), 123 (2008)
Kim HS, Shin MW, Yoon ES, “Optimization of Operating Procedure of LNG Storage Facilities Using Rigorous BOR Model,” 17th World Congress of the International Federation of Automatic Control, July, Seoul (2008)
Heestand J, Shipman CW, AlChE J., 29(2), 199 (1983)
Shin Y, Lee YP, Appl. Energy, 86(1), 37 (2009)
