Carbon dioxide liquefaction method and device for ship and ship

• Main Authors: SU CHANG, TU SHI'EN, CHEN QIUYAN, ZENG CANFEI, LI XIAOBO, ZHU XIANGLI, SHEN TENG, YANG HAORAN, LI KE, JI QINGPENG
• Format: Patent
• Language: Chinese; English
• Published: 18.04.2023
• Subjects: BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; MIXTURES BY PRESSURE AND COLD TREATMENT; REFRIGERATION OR COOLING; WEAPONS

The invention provides a carbon dioxide liquefaction method and device for a ship and the ship, and the carbon dioxide liquefaction method for the ship comprises the following steps: compressing carbon dioxide gas to increase the pressure and temperature of the carbon dioxide gas; air is compressed and expanded, so that a heat exchange medium with the temperature lower than that of the carbon dioxide gas is obtained; and performing heat exchange with the carbon dioxide gas through the heat exchange medium to obtain carbon dioxide liquid. According to the carbon dioxide liquefaction method for the ship, environment-friendly air serves as a refrigerant, and the problems that the global warming potential value is high and the global warming potential value is high in a common low-temperature liquefaction refrigerant of carbon dioxide gas for the ship are solved. Meanwhile, in the air expansion process, mechanical energy generated by air expansion can be output to the first compressor, and therefore refrigeration