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Article

Availability Estimation of Air Compression and Nitrogen Generation Systems in LNG-FPSO Depending on Design Stages

1
Offshore Industries R&BD Center, Korea Research Institute of Ships & Ocean Engineering (KRISO), Geoje 53201, Korea
2
Maritime Safety and Environmental Research Division, Korea Research Institute of Ships & Ocean Engineering (KRISO), Daejeon 34103, Korea
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(23), 8657; https://doi.org/10.3390/app10238657
Received: 21 October 2020 / Revised: 23 November 2020 / Accepted: 27 November 2020 / Published: 3 December 2020
(This article belongs to the Special Issue Systems Engineering: Availability and Reliability)
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. View Full-Text
Keywords: air compression system; nitrogen generation system; utility module; availability; sensitivity analysis air compression system; nitrogen generation system; utility module; availability; sensitivity analysis
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MDPI and ACS Style

Seo, Y.; Jung, J.-Y.; Han, S.; Kang, K. Availability Estimation of Air Compression and Nitrogen Generation Systems in LNG-FPSO Depending on Design Stages. Appl. Sci. 2020, 10, 8657. https://doi.org/10.3390/app10238657

AMA Style

Seo Y, Jung J-Y, Han S, Kang K. Availability Estimation of Air Compression and Nitrogen Generation Systems in LNG-FPSO Depending on Design Stages. Applied Sciences. 2020; 10(23):8657. https://doi.org/10.3390/app10238657

Chicago/Turabian Style

Seo, Youngkyun, Jung-Yeul Jung, Seongjong Han, and 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. https://doi.org/10.3390/app10238657

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