Boil off gas (BOG) management in Spanish liquid natural gas (LNG) terminals

Thermodynamic analysis of a novel power plant with LNG (liquefied natural gas) cold exergy exploitation and CO2 capture

“…This normal boiling point characteristic makes the N 2 vaporise with great ease, placing itself at the upper part of the tank in a gaseous state. Therefore, N 2 concentration in boil-off (the NG vapour generated through the heat input in the tank) is greater than in the LNG that is sent to the regasification process [50]. For these reasons, the mixture of light LNG is selected to proceed with the study of the proposed plant.…”

An efficient pulse tube cryocooler for boil-off gas reliquefaction in liquid natural gas tanks

“…In large-scale terminals, BOG is either recondensed using a portion of the cold LNG sendout, used as a fuel source to power prime movers, or reliquefied using refrigerators [2][3][4][5][6]. No BOG venting is permitted during normal operation.…”

Performance Improvement of a Boil-off Gas Re-condensation Process with Pre-cooling at LNG Terminals

“…Since it is difficult to measure the BOG components by experimental methods [11], calculations for BOG properties have been done by Aspen HYSYS based on the LNG storage tank operation condition and LNG compositions [16,18]. The mole fraction of components for BOG is obtained by mass balance, heat balance and phase equilibrium ( Table 2).…”

“…Although the direct compression process is simple in device, it has been proven that the energy-utilization efficiency of BOG recondensation system is 30% -60% higher than that of compressing BOG directly to a distribution pipeline [10]. Meanwhile, the re-condensation process is proven to require 50% lower power consumption and less maintenance [11].…”