Energy Saving Optimization of Seawater Pump and Open Rack Vaporizer in LNG Receiving Station
In order to solve the problem of high energy consumption during LNG gasification in open rack va-porizer(ORV)at LNG receiving stations,taking into account seasonal differences in export volume,combined with the operational performance of seawater pump,valve characteristics,seawater pump sump level and pipeline resistance loss factors,a pipeline network model from the outlet of seawater pump to the inlet of ORV was built.The seawater supply of the model was optimized by adjusting the valve opening of the seawater pump and the num-ber of seawater pumps in operation,and the accuracy of the model was verified through field test.The research re-sults show that the optimization model provides reliable valve opening and corresponding flow rate prediction for the operation of seawater pumps,which can fully meet the needs of actual flow regulation.The optimization model has a significant effect on energy saving and consumption reduction,reducing the energy consumption of seawater pumps by more than 30%compared to the operating plan before optimization.The conclusions provide technical support for the sustainable operation of LNG receiving stations and the achievement of energy saving and consump-tion reduction goals.
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