Continuous Relaxation of MINLP Problems by Penalty Functions: A Practical Comparison

Costa, M. Fernanda P.; Rocha, Ana Maria A. C.; Fernandes, Edite Manuela da G. P.

doi:10.1007/978-3-319-62398-6_8

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…For the hydraulic constraints in the operation optimization model of the LNG submerged pump system of the LNG receiving terminal, the penalty function f is constructed to solve the problem [21].…”

Section: Model Solvingmentioning

confidence: 99%

Research on Operation Optimization of LNG Submerged Pump System in LNG Receiving Terminals

et al. 2022

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This paper focuses on improving the operating efficiency of the Liquified Natural Gas (LNG) submerged pump system in the LNG receiving terminals and achieve energy saving. The minimum input energy consumption of the LNG submerged pump system is taken as the objective function, and an optimization model for the operation of the LNG submerged pump system with variable frequency speed is established. LINGO18.0 optimization software is used to solve the model to get the optimal LNG submerged pump operation plan that satisfies the constraints. Taking a certain LNG receiving terminal as an example, the operation optimization of its LNG submerged pump system is carried out, and the input energy consumption of the system before and after optimization is compared. The results show that the use of variable frequency pumps can reduce the energy consumption of the LNG submerged pump system of LNG receiving terminals, and the optimization model can reduce the input power consumption of the system by about 10% under different transportation conditions. After applying the optimization model to actual production, it is found that the model has certain practicability for guiding the production of LNG receiving terminal.

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Section: Model Solvingmentioning

confidence: 99%

Research on Operation Optimization of LNG Submerged Pump System in LNG Receiving Terminals

et al. 2022

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Heat Transfer Analysis and Operation Optimization of an Intermediate Fluid Vaporizer

et al. 2023

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An intermediate fluid vaporizer (IFV) is a typical vaporizer of liquefied natural gas (LNG), which is used in a large number of LNG terminals. Since it requires a large supply of seawater during its operation, it generates a lot of energy consumption. In this study, to reduce the seawater consumption in the regasification system, the heat transfer process was first numerically calculated, and the heat transfer coefficient of the IFV was determined for different seawater inlet temperatures, seawater flow rates, and LNG flow rates. The calculation results of the heat transfer coefficient were integrated into the numerical model in HYSYS, and the minimum seawater flow of the IFV under different working conditions was obtained. For receiving terminals using multiple IFVs, this study programmed calculations based on optimization software. The operating configuration of the IFVs under different operating conditions was optimized to reduce the consumption of seawater in the regasification system of the LNG terminals.

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Continuous Relaxation of MINLP Problems by Penalty Functions: A Practical Comparison

Cited by 2 publications

References 13 publications

Research on Operation Optimization of LNG Submerged Pump System in LNG Receiving Terminals

Research on Operation Optimization of LNG Submerged Pump System in LNG Receiving Terminals

Heat Transfer Analysis and Operation Optimization of an Intermediate Fluid Vaporizer

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