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This study investigates the transient behavior of an electro-thermal drilling probe (ETDP) during a close-contact melting process within a glacier. In particular, the present work analyzes the effect of the tip temperature on the formation of molten thin liquid films and the subsequent rate of penetration (ROP) through numerical simulation. We used the commercial code of ANSYS Fluent (v.17.2) to solve the Reynolds-averaged Navier–Stokes equation, together with an energy equation considering the solidification and melting model. The ROP of the drilling probe is determined based on the energy balance between the heating power and melting rate of ice. As the results, the ETDP penetrates the ice through a close-contact melting process. The molten liquid layer with less than 1 mm of thickness forms near the heated probe tip. In addition, the ROP increases with the heated temperature of the probe tip.
Chan Jeong; Kwangu Kang; Ui-Joon Park; Hyung Lee; Hong Kim; Jin-Yeong Park; Seong Lee. Numerical Investigation on the Evolution of Thin Liquid Layer and Dynamic Behavior of an Electro-Thermal Drilling Probe during Close-Contact Heat Transfer. Applied Sciences 2021, 11, 3443 .
AMA StyleChan Jeong, Kwangu Kang, Ui-Joon Park, Hyung Lee, Hong Kim, Jin-Yeong Park, Seong Lee. Numerical Investigation on the Evolution of Thin Liquid Layer and Dynamic Behavior of an Electro-Thermal Drilling Probe during Close-Contact Heat Transfer. Applied Sciences. 2021; 11 (8):3443.
Chicago/Turabian StyleChan Jeong; Kwangu Kang; Ui-Joon Park; Hyung Lee; Hong Kim; Jin-Yeong Park; Seong Lee. 2021. "Numerical Investigation on the Evolution of Thin Liquid Layer and Dynamic Behavior of an Electro-Thermal Drilling Probe during Close-Contact Heat Transfer." Applied Sciences 11, no. 8: 3443.
This study estimated availability of an air compression system and a nitrogen generation system in liquefied natural gas—floating production storage and offloading unit (LNG-FPSO) with different design stages to investigate the gap between the availability at the early design stage and that at the late design stage. Although availability estimation in the early design stage is more important than the late design stage, it is difficult to estimate the availability accurately in the early design stage. The design stage was divided into three depending on the design progress. Monte Carlo simulation technique was employed for the availability estimation. The results of the availability estimation showed that there was 0.434% difference between the early and late design stages. This meant that the availability in the early design stage was underestimated due to limited information. A sensitivity analysis was performed to investigate critical factors affecting the results. The investigated factors were failure rate, repair time, redundant equipment, and modified preventive maintenance schedule. The most critical factor was redundant equipment. It increased 0.486% availability.
Youngkyun Seo; Jung-Yeul Jung; Seongjong Han; Kwangu Kang. Availability Estimation of Air Compression and Nitrogen Generation Systems in LNG-FPSO Depending on Design Stages. Applied Sciences 2020, 10, 8657 .
AMA StyleYoungkyun Seo, Jung-Yeul Jung, Seongjong Han, Kwangu Kang. Availability Estimation of Air Compression and Nitrogen Generation Systems in LNG-FPSO Depending on Design Stages. Applied Sciences. 2020; 10 (23):8657.
Chicago/Turabian StyleYoungkyun Seo; Jung-Yeul Jung; Seongjong Han; Kwangu Kang. 2020. "Availability Estimation of Air Compression and Nitrogen Generation Systems in LNG-FPSO Depending on Design Stages." Applied Sciences 10, no. 23: 8657.
In this study, the basic configuration and operation concept of a CO2 terminal were identified by conducting a system engineering process. The performance goal of a CO2 terminal was determined by requirement analysis. Then, functions and timelines were derived by functional analysis to meet the performance goal. Equipment to perform the functions were defined and finally, a process flow block diagram of the CO2 terminal was acquired. The CO2 terminal in this study consisted of three parts. First, the CO2 loading/unloading part is responsible for liquid CO2 unloading from the carrier and loading vapor CO2 onto the carrier. Secondly, the liquid CO2 transmission part extracts liquid CO2 from the storage tanks and increases the pressure until it satisfies the offshore pipeline transportation condition. The vapor-treatment part collects boil-off gas, generates vapor CO2, and charges the storage tanks with vapor CO2 to control the pressure of the storage tanks that discharge liquid CO2. Finally, the study results were compared with a liquefied natural gas (LNG) terminal. The biggest difference between the CO2 terminal in this study and the LNG terminal is that a vaporizer is essential in the CO2 terminal due to the smaller storage capacity of the CO2 terminal and, therefore, the lower amount of boil-off gas.
Hyonjeong Noh; Kwangu Kang; Cheol Huh; Seong-Gil Kang; Seong Jong Han; Hyungwoo Kim. Conceptualization of CO2 Terminal for Offshore CCS Using System Engineering Process. Energies 2019, 12, 4350 .
AMA StyleHyonjeong Noh, Kwangu Kang, Cheol Huh, Seong-Gil Kang, Seong Jong Han, Hyungwoo Kim. Conceptualization of CO2 Terminal for Offshore CCS Using System Engineering Process. Energies. 2019; 12 (22):4350.
Chicago/Turabian StyleHyonjeong Noh; Kwangu Kang; Cheol Huh; Seong-Gil Kang; Seong Jong Han; Hyungwoo Kim. 2019. "Conceptualization of CO2 Terminal for Offshore CCS Using System Engineering Process." Energies 12, no. 22: 4350.
Hyonjeong Noh; Min-Bong Park; Kwangu Kang; Su-Gil Cho; Tae-Sam Yoon. JOB SAFETY ANALYSIS OF A TOP DRIVE MACHINE IN MOBILE OFFSHORE DRILLING UNITS. Risk Analysis XI 2018, 1 .
AMA StyleHyonjeong Noh, Min-Bong Park, Kwangu Kang, Su-Gil Cho, Tae-Sam Yoon. JOB SAFETY ANALYSIS OF A TOP DRIVE MACHINE IN MOBILE OFFSHORE DRILLING UNITS. Risk Analysis XI. 2018; ():1.
Chicago/Turabian StyleHyonjeong Noh; Min-Bong Park; Kwangu Kang; Su-Gil Cho; Tae-Sam Yoon. 2018. "JOB SAFETY ANALYSIS OF A TOP DRIVE MACHINE IN MOBILE OFFSHORE DRILLING UNITS." Risk Analysis XI , no. : 1.
Sanghyun Park; Hyonjeong Noh; Su-Gil Cho; Kwangu Kang. LAYER OF PROTECTION ANALYSIS FOR CO2 STORAGE TANK. Risk Analysis XI 2018, 1 .
AMA StyleSanghyun Park, Hyonjeong Noh, Su-Gil Cho, Kwangu Kang. LAYER OF PROTECTION ANALYSIS FOR CO2 STORAGE TANK. Risk Analysis XI. 2018; ():1.
Chicago/Turabian StyleSanghyun Park; Hyonjeong Noh; Su-Gil Cho; Kwangu Kang. 2018. "LAYER OF PROTECTION ANALYSIS FOR CO2 STORAGE TANK." Risk Analysis XI , no. : 1.
Carbon capture and storage (CCS) is regarded as one of key technologies to meet global greenhouse gas emission reduction goal. In this manner, South...
Hyonjeong Noh; Kwangu Kang; Cheol Huh; Seong-Gil Kang; Youngkyun Seo. Identification of potential hazardous events of unloading system and CO2 storage tanks of an intermediate storage terminal for the Korea clean carbon storage project 2025. International Journal of Safety and Security Engineering 2018, 8, 258 -265.
AMA StyleHyonjeong Noh, Kwangu Kang, Cheol Huh, Seong-Gil Kang, Youngkyun Seo. Identification of potential hazardous events of unloading system and CO2 storage tanks of an intermediate storage terminal for the Korea clean carbon storage project 2025. International Journal of Safety and Security Engineering. 2018; 8 (2):258-265.
Chicago/Turabian StyleHyonjeong Noh; Kwangu Kang; Cheol Huh; Seong-Gil Kang; Youngkyun Seo. 2018. "Identification of potential hazardous events of unloading system and CO2 storage tanks of an intermediate storage terminal for the Korea clean carbon storage project 2025." International Journal of Safety and Security Engineering 8, no. 2: 258-265.
Youngkyun Seo; Seongjong Han; Kwangu Kang; Hyon-Jeong Noh; Sanghyun Park; Jung-Yeul Jung; Daejun Chang; Marko Čepin; Radim Briš. Availability estimation of utility module in offshore plant depending on system configuration. Safety and Reliability – Theory and Applications 2017, 320 -320.
AMA StyleYoungkyun Seo, Seongjong Han, Kwangu Kang, Hyon-Jeong Noh, Sanghyun Park, Jung-Yeul Jung, Daejun Chang, Marko Čepin, Radim Briš. Availability estimation of utility module in offshore plant depending on system configuration. Safety and Reliability – Theory and Applications. 2017; ():320-320.
Chicago/Turabian StyleYoungkyun Seo; Seongjong Han; Kwangu Kang; Hyon-Jeong Noh; Sanghyun Park; Jung-Yeul Jung; Daejun Chang; Marko Čepin; Radim Briš. 2017. "Availability estimation of utility module in offshore plant depending on system configuration." Safety and Reliability – Theory and Applications , no. : 320-320.
지구온난화를 방지하기 위해 대량의 CO₂를 감축 시킬 수 있는 해양 CCS(Carbon dioxide Capture and Storage) 실증 및 상용화를 국내에서 준비 중이다. 해양 CCS 사업은 해양내 심부 퇴적층을 대상으로 대규모 CO2를 수송, 주입, 저장하는 기술로써, 누출 등의 사고 발생 시 인명, 환경, 재산 등에 큰 피해를 야기할 잠재적 가능성을 가지고 있다. 따라서 해양 CCS 사업 안전성을 확보하기 위해서는 생애주기에 걸쳐서 유·가스 생산 해양플랜트에 준하는 엄격한 HSE(Health, Safety and Environment) 관리 방안이 요구된다. 하지만 국내에는 CCS 사업에 적용 가능한 HSE 법 또는 규정이 없을 뿐만 아니라 관련 연구도 미비한 상황이다. 이에 본 연구에서는 국외 해양플랜트 관련 HSE 관리 방법론, 해양 CCS HSE 관리 가이드라인 및 국외 사례를 분석하고, 이를 통하여 국내에서 해양 CCS를 추진시 HSE 관리 프레임워크 구축에 필요한 요구사항을 도출하였다. 이를 위해 본 연구에서는 먼저 범용적으로 활용되는 위험 관리방법론인 ISO 31000에 대한 분석을 수행하였다. 또한 해양플랜트 HSE 관리체계를 체계적으로 구축· 운영 중인 노르웨이와 영국의 해양 CCS HSE 관리 가이드라인 및 적용 사례를 각각 분석하였다. 이를 토대로 국내에서 해양 CCS 사업 추진시 HSE 관리 프레임워크 구축을 위해 우선적으로 수행해야할 사항으로 HSE Philosophy의 작성의 필요성을 피력하였고 생애주기 단계에 따른 HSE 관리 프로세스를 제안하였다. 본 논문에서 제안한 HSE 관리 프레임워크를 통해 국내 해양 CCS 실증 사업 추진시 기획 설계 단계부터 HSE 관리를 한다면 보다 안전하고 체계적인 사업을 이행할 수 있을 것으로 기대된다.
Hyonjeong Noh; Kwangu Kang; Seong-Gil Kang; Jong-Gap Lee. Strategy for Development of HSE Management Framework for Offshore CCS Project in Korea. Journal of the Korean Society for Marine Environment & Energy 2017, 20, 26 -36.
AMA StyleHyonjeong Noh, Kwangu Kang, Seong-Gil Kang, Jong-Gap Lee. Strategy for Development of HSE Management Framework for Offshore CCS Project in Korea. Journal of the Korean Society for Marine Environment & Energy. 2017; 20 (1):26-36.
Chicago/Turabian StyleHyonjeong Noh; Kwangu Kang; Seong-Gil Kang; Jong-Gap Lee. 2017. "Strategy for Development of HSE Management Framework for Offshore CCS Project in Korea." Journal of the Korean Society for Marine Environment & Energy 20, no. 1: 26-36.
Kwangu Kang; Cheol Huh; Seong-Gil Kang. A Numerical Study on the CO2 Leakage Through the Fault During Offshore Carbon Sequestration. Journal of the Korean Society for Marine Environment & Energy 2015, 18, 94 -101.
AMA StyleKwangu Kang, Cheol Huh, Seong-Gil Kang. A Numerical Study on the CO2 Leakage Through the Fault During Offshore Carbon Sequestration. Journal of the Korean Society for Marine Environment & Energy. 2015; 18 (2):94-101.
Chicago/Turabian StyleKwangu Kang; Cheol Huh; Seong-Gil Kang. 2015. "A Numerical Study on the CO2 Leakage Through the Fault During Offshore Carbon Sequestration." Journal of the Korean Society for Marine Environment & Energy 18, no. 2: 94-101.
In this study, a techno–economic model was used to calculate the costs of CO2 transport and specify the major equipment required for transport in order to demonstrate and implement CO2 sequestration in the offshore sediments of South Korea. First, three different carbon capture and storage demonstration scenarios were set up involving the use of three CO2 capture plants and one offshore storage site. Each transport scenario considered both the pipeline transport and ship transport options. The temperature and pressure conditions of CO2 in each transport stage were determined from engineering and economic viewpoints, and the corresponding specifications and equipment costs were calculated. The transport costs for a 1 MtCO2/year transport rate were estimated to be US$33/tCO2 and US$28/tCO2 for a pipeline transport of ~530 km and ship transport of ~724 km, respectively. Through the economies of scale effect, the pipeline and ship transport costs for a transport rate of 3 MtCO2/year were reduced to approximately US$21/tCO2 and US$23/tCO2, respectively. A CO2 hub terminal did not significantly reduce the cost because of the short distance from the hub to the storage site and the small number of captured sources.
Kwangu Kang; Youngkyun Seo; Daejun Chang; Seong-Gil Kang; Cheol Huh. Estimation of CO2 Transport Costs in South Korea Using a Techno-Economic Model. Energies 2015, 8, 2176 -2196.
AMA StyleKwangu Kang, Youngkyun Seo, Daejun Chang, Seong-Gil Kang, Cheol Huh. Estimation of CO2 Transport Costs in South Korea Using a Techno-Economic Model. Energies. 2015; 8 (3):2176-2196.
Chicago/Turabian StyleKwangu Kang; Youngkyun Seo; Daejun Chang; Seong-Gil Kang; Cheol Huh. 2015. "Estimation of CO2 Transport Costs in South Korea Using a Techno-Economic Model." Energies 8, no. 3: 2176-2196.
Kwangu Kang; Cheol Huh; Seong-Gil Kang; Jong-Hwa Baek; Hyon Jeong Noh. Estimation of CO2 Pipeline Transport Cost in South Korea Based on the Scenarios. Energy Procedia 2014, 63, 2475 -2480.
AMA StyleKwangu Kang, Cheol Huh, Seong-Gil Kang, Jong-Hwa Baek, Hyon Jeong Noh. Estimation of CO2 Pipeline Transport Cost in South Korea Based on the Scenarios. Energy Procedia. 2014; 63 ():2475-2480.
Chicago/Turabian StyleKwangu Kang; Cheol Huh; Seong-Gil Kang; Jong-Hwa Baek; Hyon Jeong Noh. 2014. "Estimation of CO2 Pipeline Transport Cost in South Korea Based on the Scenarios." Energy Procedia 63, no. : 2475-2480.