Optimal Design and Operating Conditions of the CO2 Liquefaction Process, Considering Variations in Cooling Water Temperature

Ship transportation of liquid CO 2 is now considered as an alternative transport option to pipelines, in the absence of any suitable onshore storage locations. The compressors for a liquefaction process in the transport chain account for a significant portion of the total energy consumption. The temperature of seawater as an intercooling medium has a very significant effect on the energy consumption of the multistage compressors. Although several studies for the optimal design and operation of liquefaction process have been proposed, they do not consider the seasonal and locational variations in the cooling water temperature; therefore, further improvement in the energy efficiency in the CO 2 liquefaction process is necessary. In this study, the variations in the operational energy and other operational issues of the CO 2 liquefaction process, according to the actual seawater temperature…