Advanced process design of subcooling re-liquefaction system considering storage pressure for a liquefied CO2 carrier

被引:4
|
作者
Lee, Jaejun [1 ,2 ]
Son, Heechang [1 ]
Oh, Juyoung [1 ]
Yu, Taejong [1 ]
Kim, Hyeonuk [2 ]
Lim, Youngsub [1 ]
机构
[1] Seoul Natl Univ, Dept Naval Architecture & Ocean Engn, 1 Gwanak Ro, Seoul 08826, South Korea
[2] HD Korea Shipbuilding & Offshore Engn, Decarbonizat Ship Res Lab, 477,Bundangsuseo Ro, Seongnam Si 13553, Gyeonggi Do, South Korea
关键词
Liquefied carbon dioxide (LCO 2 ); Cargo handling system; Re -liquefaction system; Subcooling system; LCO; 2; carrier; Exergy analysis; TRANSPORT SHIP; CCS; OPTIMIZATION; STRATEGY; CAPTURE; IMPACT; MODEL;
D O I
10.1016/j.energy.2024.130556
中图分类号
O414.1 [热力学];
学科分类号
摘要
Because carbon capture and storage methods are considered greenhouse gas reduction technologies, demand for a large liquefied CO2 (LCO2) carrier to transport captured CO2 to storage sites has arisen. To prevent the emission of boil -off CO2 gas during transport, a CO2 re -liquefaction system would be required. This study suggests a new type of LCO2 subcooling re -liquefaction system for an LCO2 carrier and demonstrates its effectiveness by comparing its performance with that of conventional re -liquefaction systems considering LCO2 storage pressure. The results show that the suggested LCO2 subcooling system has lower specific energy consumption than that of conventional LCO2 re -liquefaction systems, even with a simpler configuration. At 15 bar of storage pressure, the LCO2 subcooling system has a lower specific energy consumption of 176.91 kJ/kgCO2, which is 18.2 and 5.3 % lower than that of the Linde-Hampson cycle and vapor -compression refrigeration cycle using NH3 as a refrigerant, respectively. Additionally, economic benefits can be obtained because the boil -off CO2 compressor is not required in an LCO2 subcooling system. Finally, considering CO2 re -liquefaction performance and the design constraints of the LCO2 carrier, 15 bar LCO2 storage conditions with a subcooling system are considered the most economical LCO2 carrier design.
引用
收藏
页数:16
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