Title: Case History for Gas Re-Liquefaction System in Incheon LNG Terminal, South Korea
Author(s): Hyun Cho and Subhash N. Shah, The University of Oklahoma
Presentation: GASTECH 2000
Location: Houston, Texas, USA
Date:November 14-17, 2000
Abstract: As the increase in the use of cold energy for air separation, cold storage, and food processing, re-gasified gas is increased in a LNG receiving terminal. The summed rate of both the re-gasified gas and normal boil-off gas (BOG) from storage tanks often exceeds the gas send-out rate of the terminal. In safety and economics points of view, treatment of both BOG and re-gasified gas from the facilities resulted in cold energy exchange is a troublesome matter in a LNG receiving terminal. To overcome this problem effectively, a gas re-liquefaction system has been designed and operated in Incheon LNG receiving terminal, South Korea.
This paper presents the design concepts and feature of its process for the gas re-liquefaction system installed in the Incheon LNG terminal. This paper also presents the methodology developed to obtain the optimum BOG re-liquefaction system based on the total economics as well as system reliability. Integrated approaches considering high operational system reliability and cost effective design are discussed in this paper. The results are proved with the system reliability as well as economic operation through a three-year case history of the Incheon LNG receiving terminal. The methodology discussed in this paper can be directly applied to any LNG terminal considering expansion of the practical use of cold energy from LNG.
