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。...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CO_(2)液化循环和电力的生产,通过CO_(2)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。展开更多
Compressed air energy storage(CAES)is an important technology in the development of renewable energy.The main advantages of CAES are its high energy capacity and environmental friendliness.One of the main challenges i...Compressed air energy storage(CAES)is an important technology in the development of renewable energy.The main advantages of CAES are its high energy capacity and environmental friendliness.One of the main challenges is its low energy density,meaning a natural cavern is required for air storage.High-pressure air compression can effectively solve the problem.A liquid piston gas compressor facilitates high-pressure compression,and efficient convective heat transfer can significantly reduce the compression energy consumption during air compression.In this paper,a near isothermal compression method is proposed to increase the surface area and heat exchange by using multiple tube bundles in parallel in the compression chamber in order to obtain high-pressure air using liquid-driven compression.Air compression with a compression ratio of 6.25:1 is achieved by reducing the tube diameter and increasing the parallel tube number while keeping the compression chamber cross-sectional area constant in order to obtain a high-pressure air of 5 MPa.The performances of this system are analyzed when different numbers of tubes are applied.A system compression efficiency of 93.0%and an expansion efficiency of 92.9%can be achieved when 1000 tubes are applied at a 1 minute period.A new approach is provided in this study to achieve high efficiency and high pressure compressed air energy storage.展开更多
研究多能源联合供应的综合能源系统对实现我国碳达峰和碳中和的目标有重大的意义。消纳新能源和多种能源互补是深冷液化空气储能(cryogenic liquid air energy storage,LAES)系统的重要优势,为了提升综合能源系统的灵活性和可靠性,并且...研究多能源联合供应的综合能源系统对实现我国碳达峰和碳中和的目标有重大的意义。消纳新能源和多种能源互补是深冷液化空气储能(cryogenic liquid air energy storage,LAES)系统的重要优势,为了提升综合能源系统的灵活性和可靠性,并且能够消纳更多的新能源,首先将LAES系统加入综合能源系统中,建立含LAES的综合能源系统,搭建系统的数学模型;然后以系统最小化运行成本为目标,以实际负荷数据为基础,构建了综合能源系统的经济性调度优化模型;最后通过MATLAB对系统进行仿真,并且调用商用软件CPLEX进行优化,从而验证综合能源系统规划的可行性。仿真结果表明,加入新型储能设备后,提高了综合能源系统的经济效益、新能源消纳率、一次能源节约率及碳减排量,同时能够平稳地应对能源价格的波动。展开更多
文摘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CO_(2)液化循环和电力的生产,通过CO_(2)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。
文摘Compressed air energy storage(CAES)is an important technology in the development of renewable energy.The main advantages of CAES are its high energy capacity and environmental friendliness.One of the main challenges is its low energy density,meaning a natural cavern is required for air storage.High-pressure air compression can effectively solve the problem.A liquid piston gas compressor facilitates high-pressure compression,and efficient convective heat transfer can significantly reduce the compression energy consumption during air compression.In this paper,a near isothermal compression method is proposed to increase the surface area and heat exchange by using multiple tube bundles in parallel in the compression chamber in order to obtain high-pressure air using liquid-driven compression.Air compression with a compression ratio of 6.25:1 is achieved by reducing the tube diameter and increasing the parallel tube number while keeping the compression chamber cross-sectional area constant in order to obtain a high-pressure air of 5 MPa.The performances of this system are analyzed when different numbers of tubes are applied.A system compression efficiency of 93.0%and an expansion efficiency of 92.9%can be achieved when 1000 tubes are applied at a 1 minute period.A new approach is provided in this study to achieve high efficiency and high pressure compressed air energy storage.
文摘研究多能源联合供应的综合能源系统对实现我国碳达峰和碳中和的目标有重大的意义。消纳新能源和多种能源互补是深冷液化空气储能(cryogenic liquid air energy storage,LAES)系统的重要优势,为了提升综合能源系统的灵活性和可靠性,并且能够消纳更多的新能源,首先将LAES系统加入综合能源系统中,建立含LAES的综合能源系统,搭建系统的数学模型;然后以系统最小化运行成本为目标,以实际负荷数据为基础,构建了综合能源系统的经济性调度优化模型;最后通过MATLAB对系统进行仿真,并且调用商用软件CPLEX进行优化,从而验证综合能源系统规划的可行性。仿真结果表明,加入新型储能设备后,提高了综合能源系统的经济效益、新能源消纳率、一次能源节约率及碳减排量,同时能够平稳地应对能源价格的波动。
