In this study

the amount and grade of cold energy in liquefied natural gas (LNG) were analyzed. According to the principles of "high-grade-demand with high-grade-energy

low-grade-demand with low-grade-energy

temperature matching

and cascade utilization

" LNG cold energy can be used in power generation

air separation

seawater desalination

CO2 capture

and low-temperature cold storage

and the process methods

temperature range of utilization

working fluid properties

and advantages and disadvantages of LNG cold energy were discussed. The temperature ranges of existing LNG cold energy cascade utilization processes were compared to achieve more suitable temperature level matching. Specific schemes for cascade utilization of LNG cold energy were provided for large LNG gasification stations

small LNG gasification stations

and large ocean-going LNG ships.