Comparison of LNG direct output and recondensation processes

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The direct output process is to compress the evaporated gas to the external output pressure and send it directly to the gas transmission network, which requires a large amount of compression power.； The recondensation process is to compress the evaporator gas to a certain intermediate pressure, and then mix it with the LNG sent from the storage tank by a low-pressure transfer pump in the recondenser. Since the LNG is in a supercooled state after being pressurized, the evaporator gas can be re-condensed. The condensed LNG is pressurized and vaporized by the high-pressure output pump and then transported through the pipeline. Therefore, the recondensation process can utilize the cooling capacity of LNG to reduce the consumption of compression work of evaporated gas, thereby saving energy, and is more advanced and reasonable than the direct output process.