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Characteristics of boil-off-gas partial re-liquefaction systems in LNG ships
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 Title & Authors
Characteristics of boil-off-gas partial re-liquefaction systems in LNG ships
Yun, Sang-Kook;
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 Abstract
To protect the ocean environment, the use of liquefied natural gas (LNG) carriers, bunkering ships, and fueled ships is increasing. Recently, Korean shipbuilders have developed and supplied a partial reliquefaction facility for boil-off-gas (BOG). Despite reasonable insulation, heat leakage in vessel storage tanks causes LNG to be continuously evaporated as BOG. This research analyzed the maximum liquid yield rate for various partial reliquefaction systems (PRS) and considered related factors affecting yields. The results showed a liquid yield of 48.7% from an indirect PRS system (heat exchanges between cold flash gas and compressed natural gas), and 41% from a direct PRS system (BOG is mixed with flash gas and discharged from a liquid-vapor separator). The primary factor affecting liquid yield was heat exchanger effectiveness; the exchanger`s efficiency and insulation characteristics directly affect the performance of BOG reliquefaction systems.
 Keywords
LNG carrier;Boil-off-gas;Partial re-liquefaction system;Flash gas;Liquid yield;
 Language
Korean
 Cited by
1.
A Study on the Development of Educational Programs for LNG Bunkering in Consideration of the Safety System, Journal of the Korean Society of Marine Environment and Safety, 2016, 22, 3, 268  crossref(new windwow)
 References
1.
J. D. Bukowski, Y. N. Liu, S. J. Boccella, and L. J. Kowalski, "Innovations in NG liquefaction technology for future LNG plants and floating LNG facilities," International Gas Union Research Conference. 2011. [Online]. Available: http://www.airproducts.nl/-/media/Files/PDF/industries/LNG-IGRC-innovations-in-natural-gas-liquefaction-technology.pdf

2.
O. Mate and A. M. Diaz, IZAR BOG Reliquefaction System for Marine Applications, World Maritime Conference 17-20, 2003. [Online]. Available: http://www.sname.org/HigherLogic/System/DownloadDoc umentFile.ashx?DocumentFileKey=310d4532-b5e7-4d50-bebf-7a8edb14d965

3.
Daewoo Shipbuilding & Marine Engineering Co. Ltd., "Reliquefaction System and method For Boil Off Gas," Korea, Patent 1020130131946, 2013 (in Korean).

4.
Hyundai Heavy Industries Co. Ltd., "Treatment System of Liquefied Gas," Korea, Patent 1020130147915, 2013 (in Korean).

5.
R. F. Barron, Cryogenic Systems, 2tnd ed., NY, USA: Oxford University Press, 1985.

6.
S. K. Yun, "Process design and analysis of BOG re-liquefaction system with pre-liquefaction of NGL," Journal of the Korean Institute of Gas, vol. 19, no. 3, pp. 32-38, 2015 (in Korean). crossref(new window)

7.
Y. Chin, J. W. Moon, Y. P. Lee, and H. M. Chang, "Thermodynamic analysis of re-liquefaction cycle of LNG boil-off gas," International Journal of Air-Conditioning and Refrigeration, vol. 19, no. 7, pp. 485-490, 2007 (in Korean).

8.
HI-ERS : Hyundai innovative Economical Re-liquefaction System, HHI Journal A10-148-00, Sep. 2014.

9.
D. K. Choi, J. K. Kang, Y. Moon, J. Jung, O. Kwon, and N. S. Kim, "Hybrid FGS System with Partial Re-Liquefaction Unit for MEGI Propelled LNG Carrier," Gastech Conference, 2014.