首页|FLNG船舶能量管理系统设计与性能优化

FLNG船舶能量管理系统设计与性能优化

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浮式液化天然气生产储卸装置(floating liquefied natural gas system,FLNG)特种液货船作为开发海上天然气田的新式装置,极大的方便了对处于深海的气田的开发利用,该文以"Prelude"号 FLNG 作为母船,提出一种新型FLNG低温能量管理系统.该系统主要利用液态空气作为媒介储存和释放能量,通过液态空气冷能与混合制冷循环相结合实现天然气液化过程,在提高LNG生产性能的同时集成了 CO2 液化循环和电力的生产,通过 CO2 液化和剩余冷能发电提高系统的输出性能,实现了 FLNG 船舶冷能的多级利用,也为 FLNG 船舶冷能利用提供新方法,新途径.所提系统相较于基准模型具有更好的性能,在 7.04 年可实现成本回收.最后采用多目标性能优化,进一步提高系统㶲效率达60.67%,同时降低约2.3%的成本.该FLNG低温能量管理系统有高效、低耗、稳收益、低碳化等特点,可更好优化海上LNG供应链,促进航运业"双碳"发展.
Design and Performance Optimization of Energy Management System for FLNG Ships
Floating liquefied natural gas production,storage and unloading unit special liquid cargo vessel(FLNG),as a new device for the development of offshore natural gas fields,greatly facilitates the development and utilization of deep-sea gas fields.This paper proposes a new type of cryogenic energy management system for special liquid cargo ships using the FLNG"Prelude"as the depot ship.The system mainly uses liquid air as a medium to store and release energy.Through the combination of liquid air-cooling energy and mixed refrigeration cycle,the process of natural gas liquefaction is realized.While improving the production performance of LNG,the CO2 liquefaction cycle and power production are integrated,and the output performance of the system is improved through CO2 liquefaction and surplus cold energy generation.The multi-stage utilization of FLNG ship cold energy is realized,and a new method and a new way are provided for FLNG ship cold energy utilization.The proposed system has better performance than the benchmark model and can achieve cost recovery in 7.04 years.Finally,multi-objective performance optimization is adopted to further increase the exergic efficiency of system exergy to 60.67%and reduce the cost by about 2.3%.The special liquid cargo ship low temperature energy management system features high efficiency,low consumption,stable returns and low carbonization,which can better optimize the offshore LNG supply chain and promote the"carbon peak and carbon neutrality"development of the shipping industry.

floating liquefied natural gas system(FLNG)shiplow temperature energy managementliquid air storagesystem designmulti-objective optimization

夏睿、王哲、董博、韩凤翚、纪玉龙、蔡文剑

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大连海事大学轮机工程学院,辽宁省 大连市 116000

浮式液化天然气生产储卸装置船舶 低温能量管理 液态空气储能 系统设计 多目标优化

国家重点研发计划中央高校基本科研业务费专项

2023YFB43017053132023527

2024

10.13334/j.0258-8013.pcsee.223349

中国电机工程学报
中国电机工程学会

中国电机工程学报

CSTPCD北大核心
影响因子：2.712
ISSN：0258-8013
年,卷(期)：2024.44(8)
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