Renewable energies including solar and wind are intermittent,causing difficulty in connection to conventional power grids due to instability of output duty.Compressed air energy storage(CAES)in underground caverns has...Renewable energies including solar and wind are intermittent,causing difficulty in connection to conventional power grids due to instability of output duty.Compressed air energy storage(CAES)in underground caverns has been considered a potential large-scale energy storage technology.In order to explore the gas injection char-acteristic of underground cavern,a detailed thermodynamic model of the system is established in the process modelling software gPROMS.The four subsystem models,i.e.the compressor,heat exchanger,underground cavern storage and expander,are connected with inlet-outlet equilibrium of flow rate/pressure/temperature to form an integrated CAES system model in gPROMS.The maximum air pressure and temperature in the cavern are focused to interrogate the critical condition of the cavern during the injection process.When analyzing the mass flow rate-pressure ratio relationship,it’s found that under specified operating conditions,an increase in mass flow rate can lead to a higher pressure ratio.Compression power demand also escalates significantly with increasing mass flow rates,underscoring the system’s energy-intensive nature.Additionally,the cooler outlet energy rate progressively decreases,becoming increasingly negative as the mass flow rate increases.These in-sights offer critical theoretical foundations for optimizing practical efficiency of CAES.展开更多
介绍了一种新型的大规模蓄能技术——压缩空气蓄能(Compressed Air Energy Storage,CAES),CAES系统响应快、容量大、成本低、寿命长,逐渐成为了全球第二大蓄能技术。根据CAES系统的容量不同,将CAES系统划分为大型CAES、小型CAES和微型CA...介绍了一种新型的大规模蓄能技术——压缩空气蓄能(Compressed Air Energy Storage,CAES),CAES系统响应快、容量大、成本低、寿命长,逐渐成为了全球第二大蓄能技术。根据CAES系统的容量不同,将CAES系统划分为大型CAES、小型CAES和微型CAES 3种,并针对3种不同容量级的CAES,详细介绍了其组成及现状,对技术特点与难点和应用领域及场景进行了分析与概述。对CAES系统的研究方向与发展前景进行了展望。展开更多
Besides pumped hydropower, Compressed Air Energy Storage (CAES) is the other solution for large energy storage capacity. It can balance fluctuations in supply and demand of electricity. CAES is essential part of smart...Besides pumped hydropower, Compressed Air Energy Storage (CAES) is the other solution for large energy storage capacity. It can balance fluctuations in supply and demand of electricity. CAES is essential part of smart power grids. Linked with the flow structure and dynamic characteristic of electricity generation subsystem and its components, a simulation model is proposed. Thermo-dynamical performance on off-design conditions have been analyzed with constant air mass flux and constant gas combustion temperature. Some simulation diagrams of curve are plotted too. The contrast of varied operation mode thermal performance is made between CAES power plant and simple gas turbine power plant.展开更多
先进绝热压缩空气储能系统(advanced adiabatic compressed air energy storage system,AA-CAES)是一种清洁、环保的大规模储能技术,能够为可再生能源并网及电网调峰提供新的解决方案。为了深入研究压气机模型对变工况下AA-CAES系统运...先进绝热压缩空气储能系统(advanced adiabatic compressed air energy storage system,AA-CAES)是一种清洁、环保的大规模储能技术,能够为可再生能源并网及电网调峰提供新的解决方案。为了深入研究压气机模型对变工况下AA-CAES系统运行性能的影响,本文在传统模型的基础上添加了压气机效率模型。求解系统模型发现:相对于储气室最高压比,换热器效能对储能效率的影响较大,换热器效能每提高0.05,储能效率平均提高2.9%;随着储气室最高压比的上升,储能密度近似呈线性增加;AA-CAES系统在储能阶段,稳定运行的前两级压气机功率保持不变,非稳定运行的第3级压气机功率随储气室压比的升高而逐渐增大,储能阶段结束时第3级压气机耗功最多。展开更多
【目的】天然气补燃型压缩空气储能(compressed air energy storage,CAES)系统存在环境污染问题,氢气作为替代燃料不会造成温室气体排放,但现阶段对纯氢补燃型CAES系统的技术经济可行性认识不足,因此有必要开展相关研究。【方法】基于[...【目的】天然气补燃型压缩空气储能(compressed air energy storage,CAES)系统存在环境污染问题,氢气作为替代燃料不会造成温室气体排放,但现阶段对纯氢补燃型CAES系统的技术经济可行性认识不足,因此有必要开展相关研究。【方法】基于[火用]和[火用]经济分析方法,进行了纯氢补燃型和天然气补燃型CAES系统的对比分析,重点关注其热力学性能、不可逆损失分布、经济性和[火用]经济性的影响。此外,探讨了两者参数敏感性。【结果】纯氢补燃型CAES系统在放电时间、储能密度和[火用]效率方面均优于天然气补燃型CAES系统;由于氢气成本高于天然气,纯氢补燃型CAES系统的产品平均[火用]成本为155.62美元/GJ,显著高于天然气补燃型CAES系统对应的27.57美元/GJ;为使纯氢补燃型CAES系统具备与天然气补燃型CAES系统相同的商用竞争力,推荐售电价格为0.2062美元/(kW·h);此外,纯氢补燃型CAES系统对参数变化更加敏感,在高参数条件下可实现更好的性能提升和成本降低。【结论】研究成果揭示了纯氢补燃型CAES系统的应用潜力,并为其进一步商业推广提供了技术参考。展开更多
目的为了适应铸造CAE技术的网络化趋势,满足铸造CAE系统前置处理模块对STL模型高级渲染的功能性需求,开发一款足以媲美OpenGL渲染环境下复杂三维图形渲染效果的Web版的STL模型查看器程序——STLViewer。方法仿效Windows桌面程序的运行...目的为了适应铸造CAE技术的网络化趋势,满足铸造CAE系统前置处理模块对STL模型高级渲染的功能性需求,开发一款足以媲美OpenGL渲染环境下复杂三维图形渲染效果的Web版的STL模型查看器程序——STLViewer。方法仿效Windows桌面程序的运行方式和界面风格,选择单页面设计方案。选用Visual Studio 2019开发平台,利用HTML5、CSS3和JavaScript技术设计程序界面。深入研究基于WebGL的STL模型可视化技术,按照依托场景环境活动模型渲染的技术路线,进行STLViewer各功能模块的开发。结果设计并实现了STLViewer,该程序功能完整性良好、内部逻辑结构合理高效。STLViewer融隐式交互和显式交互于一体,具有本地STL模型的随机性访问、活动模型的多样化交互、模型姿态的智能化跟踪、视图动画的多方式呈现、模型导出的便捷化操作等特点,实现了网络环境下STL模型的高级渲染功能。结论STLViewer作为一款性能卓越的STL模型查看器程序,既可辅助用户制订合理的网格剖分方案,又能带来优良的用户体验,在实际应用中得到了良好效果。展开更多
随着全球能源结构转型与电力系统灵活性需求的日益增长,压缩空气储能(Compressed Air Energy Storage,CAES)作为一种大容量、长时储能技术,其展现出巨大的发展潜力。陕西省作为我国西部重要能源基地,拥有大量的盐穴、废弃煤矿、枯竭油...随着全球能源结构转型与电力系统灵活性需求的日益增长,压缩空气储能(Compressed Air Energy Storage,CAES)作为一种大容量、长时储能技术,其展现出巨大的发展潜力。陕西省作为我国西部重要能源基地,拥有大量的盐穴、废弃煤矿、枯竭油气藏、灰岩溶洞等地下空间,这些天然或人工形成的地下空间为建设大型压缩空气储能设施提供了理想的场所,其通常具有较高的密封性和稳定性,适合作为高压空气的储存容器,可减少新建储气室的成本和对环境的影响。我省在资源、技术、政策与市场需求方面均具备开展地下空间压缩空气储能的良好条件,其发展前景广阔,有望成为我国乃至全球储能技术应用的典范。展开更多
基金supported by National Natural Science Foundation of China Excellent Young Scientists Fund Program,Deep Earth Probe and Mineral Resources Exploration-National Science and Technology Major Project(grant No.2024ZD1004105)Shandong Excellent Young Scientists Fund Program(Overseas)(grant No.2022HWYQ-020)Shenzhen Science and Technology Program(grant No.JCYJ20220530141016036,GJHZ20240218113359001).
文摘Renewable energies including solar and wind are intermittent,causing difficulty in connection to conventional power grids due to instability of output duty.Compressed air energy storage(CAES)in underground caverns has been considered a potential large-scale energy storage technology.In order to explore the gas injection char-acteristic of underground cavern,a detailed thermodynamic model of the system is established in the process modelling software gPROMS.The four subsystem models,i.e.the compressor,heat exchanger,underground cavern storage and expander,are connected with inlet-outlet equilibrium of flow rate/pressure/temperature to form an integrated CAES system model in gPROMS.The maximum air pressure and temperature in the cavern are focused to interrogate the critical condition of the cavern during the injection process.When analyzing the mass flow rate-pressure ratio relationship,it’s found that under specified operating conditions,an increase in mass flow rate can lead to a higher pressure ratio.Compression power demand also escalates significantly with increasing mass flow rates,underscoring the system’s energy-intensive nature.Additionally,the cooler outlet energy rate progressively decreases,becoming increasingly negative as the mass flow rate increases.These in-sights offer critical theoretical foundations for optimizing practical efficiency of CAES.
文摘介绍了一种新型的大规模蓄能技术——压缩空气蓄能(Compressed Air Energy Storage,CAES),CAES系统响应快、容量大、成本低、寿命长,逐渐成为了全球第二大蓄能技术。根据CAES系统的容量不同,将CAES系统划分为大型CAES、小型CAES和微型CAES 3种,并针对3种不同容量级的CAES,详细介绍了其组成及现状,对技术特点与难点和应用领域及场景进行了分析与概述。对CAES系统的研究方向与发展前景进行了展望。
基金National Key R&D Plan(2017YFB0903602)The frontier science research project of CAS(QYZDB-SSW-JSC023)Transformational Technologies for Clean Energy and Demonstration,Strategic Priority Research Program of the Chinese Academy of Sciences(XDA21070200)
文摘Besides pumped hydropower, Compressed Air Energy Storage (CAES) is the other solution for large energy storage capacity. It can balance fluctuations in supply and demand of electricity. CAES is essential part of smart power grids. Linked with the flow structure and dynamic characteristic of electricity generation subsystem and its components, a simulation model is proposed. Thermo-dynamical performance on off-design conditions have been analyzed with constant air mass flux and constant gas combustion temperature. Some simulation diagrams of curve are plotted too. The contrast of varied operation mode thermal performance is made between CAES power plant and simple gas turbine power plant.
文摘先进绝热压缩空气储能系统(advanced adiabatic compressed air energy storage system,AA-CAES)是一种清洁、环保的大规模储能技术,能够为可再生能源并网及电网调峰提供新的解决方案。为了深入研究压气机模型对变工况下AA-CAES系统运行性能的影响,本文在传统模型的基础上添加了压气机效率模型。求解系统模型发现:相对于储气室最高压比,换热器效能对储能效率的影响较大,换热器效能每提高0.05,储能效率平均提高2.9%;随着储气室最高压比的上升,储能密度近似呈线性增加;AA-CAES系统在储能阶段,稳定运行的前两级压气机功率保持不变,非稳定运行的第3级压气机功率随储气室压比的升高而逐渐增大,储能阶段结束时第3级压气机耗功最多。
文摘【目的】天然气补燃型压缩空气储能(compressed air energy storage,CAES)系统存在环境污染问题,氢气作为替代燃料不会造成温室气体排放,但现阶段对纯氢补燃型CAES系统的技术经济可行性认识不足,因此有必要开展相关研究。【方法】基于[火用]和[火用]经济分析方法,进行了纯氢补燃型和天然气补燃型CAES系统的对比分析,重点关注其热力学性能、不可逆损失分布、经济性和[火用]经济性的影响。此外,探讨了两者参数敏感性。【结果】纯氢补燃型CAES系统在放电时间、储能密度和[火用]效率方面均优于天然气补燃型CAES系统;由于氢气成本高于天然气,纯氢补燃型CAES系统的产品平均[火用]成本为155.62美元/GJ,显著高于天然气补燃型CAES系统对应的27.57美元/GJ;为使纯氢补燃型CAES系统具备与天然气补燃型CAES系统相同的商用竞争力,推荐售电价格为0.2062美元/(kW·h);此外,纯氢补燃型CAES系统对参数变化更加敏感,在高参数条件下可实现更好的性能提升和成本降低。【结论】研究成果揭示了纯氢补燃型CAES系统的应用潜力,并为其进一步商业推广提供了技术参考。
文摘目的为了适应铸造CAE技术的网络化趋势,满足铸造CAE系统前置处理模块对STL模型高级渲染的功能性需求,开发一款足以媲美OpenGL渲染环境下复杂三维图形渲染效果的Web版的STL模型查看器程序——STLViewer。方法仿效Windows桌面程序的运行方式和界面风格,选择单页面设计方案。选用Visual Studio 2019开发平台,利用HTML5、CSS3和JavaScript技术设计程序界面。深入研究基于WebGL的STL模型可视化技术,按照依托场景环境活动模型渲染的技术路线,进行STLViewer各功能模块的开发。结果设计并实现了STLViewer,该程序功能完整性良好、内部逻辑结构合理高效。STLViewer融隐式交互和显式交互于一体,具有本地STL模型的随机性访问、活动模型的多样化交互、模型姿态的智能化跟踪、视图动画的多方式呈现、模型导出的便捷化操作等特点,实现了网络环境下STL模型的高级渲染功能。结论STLViewer作为一款性能卓越的STL模型查看器程序,既可辅助用户制订合理的网格剖分方案,又能带来优良的用户体验,在实际应用中得到了良好效果。
文摘随着全球能源结构转型与电力系统灵活性需求的日益增长,压缩空气储能(Compressed Air Energy Storage,CAES)作为一种大容量、长时储能技术,其展现出巨大的发展潜力。陕西省作为我国西部重要能源基地,拥有大量的盐穴、废弃煤矿、枯竭油气藏、灰岩溶洞等地下空间,这些天然或人工形成的地下空间为建设大型压缩空气储能设施提供了理想的场所,其通常具有较高的密封性和稳定性,适合作为高压空气的储存容器,可减少新建储气室的成本和对环境的影响。我省在资源、技术、政策与市场需求方面均具备开展地下空间压缩空气储能的良好条件,其发展前景广阔,有望成为我国乃至全球储能技术应用的典范。
