| 초록 |
Floating liquefied natural gas facility (FLNG) helps to unlock vital energy resources off shore. FLNG technology provides a number of environmental and economic advantages. In this study, dividing wall column (DWC) is employed in the separation part in FLNG. Response surface methodology (RSM) is proposed to optimize the DWC structure. A Box-Behnken design was employed under the RSM to analyze how the variables interacted and optimize the system in terms of total annual cost. Simulation run data were fitted to a second-order polynomial model and regression coefficients were obtained. This method requires a little computational effort while it allows control variables to be optimized simultaneously. It facilitates the evaluation of interaction effects between variables. The result from rigorous simulation also revealed that the DWC can reduce total annual cost significantly, which showed good agreement with the predicted result by the RSM. Acknowledgements: This research was supported by a grant from the Gas Plant R&D Center funded by the Ministry of Land, Transportation and Maritime Affairs (MLTM) of the Korean government. |
