Study on Carbon Emission Reduction for Liquefied Natural Gas Gasification System Using Warm Seawater

Abstract

A domestic liquefied natural gas (LNG) receiving station uses warm seawater produced in electric plants as the working medium in the open rack vaporizers (ORVs), and newly added intermediate fluid vaporizers (IFVs) to realize the efficient utilization of heat resources and reduce the usage of submerged combustion vaporizers (SCVs). In this paper, the process model and mathematical model of the combined transportation of open rack vaporizer (ORV) and intermediate fluid vaporizer (IFV) are established, the minimum theoretical carbon emissions of the two vaporizers were analyzed. A carbon reduction analysis was carried out on the addition of warm seawater. The results show that the verification results of the parameters in actual operation are good, and the carbon emissions generated by the seasonal change vaporizer also change, and the addition of warm seawater can reduce a large number of carbon emissions, and the emission reduction effect is the best in summer, and the emission reduction effect is slightly weaker in winter. Differences in seawater pumps also have an impact on reducing carbon emissions.

Keywords: LNG terminal, intermediate fluid vaporizer, open rack vaporizer, carbon emission reduction, warm seawater, Pump optimization