随着清洁可再生能源的不断发展,利用洋流能为水下微型无线传感器提供电能已成为研究热点。水下涡激振动能量俘获系统是一种在浅海低流速条件下利用涡激振动效应俘获洋流能的发电装置。本文将非线性恢复力、单向轴承及齿轮齿条机构与振...随着清洁可再生能源的不断发展,利用洋流能为水下微型无线传感器提供电能已成为研究热点。水下涡激振动能量俘获系统是一种在浅海低流速条件下利用涡激振动效应俘获洋流能的发电装置。本文将非线性恢复力、单向轴承及齿轮齿条机构与振动钝体结合,提出一种新型基于洋流能的涡激振动能量俘获系统。采用Van der Pol方程描述流体和钝体间的耦合效应,建立系统流-固-电耦合动力学方程。对系统进行稳定性分析,得到系统在单稳、双稳及三稳态情况下的参数数值范围,将3种稳态下系统的振幅比进行对比,发现系统处于三稳态时具有较强的发电优势。借助数值仿真,通过钝体振动的时域图、相图、分岔图及庞加莱截面详细研究流体参数(水流流速)和结构参数(质量比和阻尼比)对系统位移响应的影响,并分析单向轴承对传动轴转速的影响。分析质量比和阻尼比对发电功率的影响。结果表明,三稳态系统拥有非常丰富的非线性动力学行为,出现混沌运动、多周期运动及准周期运动,阻尼比的变化主要影响发电功率的峰值,而质量比的变化主要影响涡激振动的共振区间范围。展开更多
为提高系统风电消纳率,降低氢能利用成本和系统碳排放量,提出一种基于动态偏差信息间隙决策理论(information gap decision theory,IGDT)的综合能源系统(integrated energy system,IES)协调优化策略。首先,在IES中引入混合制氢和富氧燃...为提高系统风电消纳率,降低氢能利用成本和系统碳排放量,提出一种基于动态偏差信息间隙决策理论(information gap decision theory,IGDT)的综合能源系统(integrated energy system,IES)协调优化策略。首先,在IES中引入混合制氢和富氧燃烧捕集系统,并构建含混合制氢和富氧燃烧捕集系统的IES模型;其次,以总运行成本最低为目标,建立确定性场景下的系统调度模型;再次,针对在处理风荷不确定性问题中传统IGDT决策模型表现出过于保守的问题,提出了基于动态偏差的IGDT决策模型;最后,通过算例结果验证了所提策略能有效提高系统总体经济性,实现了系统低碳经济协调运行。展开更多
【目的】考虑系统清洁低碳的前提下,综合能源系统中能源产品定价与市场用户的经济利益和能源运营商的盈利能力密切相关。为此,对含电转气-碳捕集电厂(power to gas-carbon capture power plant,P2G-CCPP)的综合能源系统(integrated ener...【目的】考虑系统清洁低碳的前提下,综合能源系统中能源产品定价与市场用户的经济利益和能源运营商的盈利能力密切相关。为此,对含电转气-碳捕集电厂(power to gas-carbon capture power plant,P2G-CCPP)的综合能源系统(integrated energy system,IES)进行㶲经济分析。【方法】从㶲视角出发,兼顾能量的量与质,针对不同能流进行㶲值计算,建立㶲流计算子模型。将系统低碳经济性引入㶲经济分析中,将碳排放权交易成本、碳捕集能耗成本及碳封存成本纳入非能量成本中,建立㶲经济成本分摊子模型。相较于传统定价方法,考虑了碳成本及能量品位差异对系统冷热电单位㶲成本的影响,体现优质优价原则。【结果】仿真算例表明引入P2G-CCPP联动系统能够提高系统低碳减排能力,实现成本合理分摊。【结论】含P2G-CCPP机组的综合能源系统能够有效削减系统总成本及冷热电单位成本,增强了碳利用和燃气生产消费的节能减排途径,具有显著的经济及社会效益。展开更多
The capture of atmospheric carbon dioxide by adsorbents is an important strategy to deal with the greenhouse effect.Compared with traditional CO_(2) adsorption materials like activated carbon,silica gel,and zeolite mo...The capture of atmospheric carbon dioxide by adsorbents is an important strategy to deal with the greenhouse effect.Compared with traditional CO_(2) adsorption materials like activated carbon,silica gel,and zeolite molecular sieves,covalent organic frameworks(COFs)have excellent thermal and chemical stabilities and can be produced in many different forms.Using their different possible construction units,ordered structures for specific applications can be produced,giving them broad prospects in fields such as gas storage.This review analyzes the different types of COFs that have been synthesized and their different methods of CO_(2) capture.It then discusses different ways to increase CO_(2) adsorption by changing the internal structure of COFs and modifying their surfaces.The limitations of COF-derived carbon materials in CO_(2) capture are reviewed and,finally,the key role of machine learning and computational simulation in improving CO_(2) adsorption is mentioned,and the current status and future possible uses of COFs are summarized.展开更多
CO_(2) capture and utilization(CCU)technologies have been recognized as crucial strategies for mitigating global warming,reducing carbon emission,and promoting resource circularity.As such,the design and development o...CO_(2) capture and utilization(CCU)technologies have been recognized as crucial strategies for mitigating global warming,reducing carbon emission,and promoting resource circularity.As such,the design and development of related materials have attracted considerable research attention.Carbon-based materials,characterized by tunable pore structures,abundant active sites,high specific surface area,and excellent chemical stability,demonstrate significant potential for applications in CO_(2) capture and utilization.This review systematically analyzes the adsorption behaviors and performance variations of typical carbon materials,including activated carbon,porous carbon,graphene,and carbon nanotubes during CO_(2) capture processes.Concerning CO_(2) utilization,emphasis is placed on recent advances in the catalytic applications of carbon-based materials in key reactions such as methanation,reverse water-gas shift,dry reforming of methane,and alcohol synthesis.Moreover,the benefits and drawbacks of carbon materials in terms of CO_(2) adsorption capacity,catalytic activity,and stability are thoroughly evaluated,and their potential applications in integrated CO_(2) capture and utilization technologies are discussed.Finally,key strategies for enhancing the performance of carbonaceous materials through structural modulation and surface modification are elucidated.This review aims to provide theoretical guidance for the future development and large-scale implementation of carbon-based materials in CCU technologies.展开更多
文摘随着清洁可再生能源的不断发展,利用洋流能为水下微型无线传感器提供电能已成为研究热点。水下涡激振动能量俘获系统是一种在浅海低流速条件下利用涡激振动效应俘获洋流能的发电装置。本文将非线性恢复力、单向轴承及齿轮齿条机构与振动钝体结合,提出一种新型基于洋流能的涡激振动能量俘获系统。采用Van der Pol方程描述流体和钝体间的耦合效应,建立系统流-固-电耦合动力学方程。对系统进行稳定性分析,得到系统在单稳、双稳及三稳态情况下的参数数值范围,将3种稳态下系统的振幅比进行对比,发现系统处于三稳态时具有较强的发电优势。借助数值仿真,通过钝体振动的时域图、相图、分岔图及庞加莱截面详细研究流体参数(水流流速)和结构参数(质量比和阻尼比)对系统位移响应的影响,并分析单向轴承对传动轴转速的影响。分析质量比和阻尼比对发电功率的影响。结果表明,三稳态系统拥有非常丰富的非线性动力学行为,出现混沌运动、多周期运动及准周期运动,阻尼比的变化主要影响发电功率的峰值,而质量比的变化主要影响涡激振动的共振区间范围。
文摘为提高系统风电消纳率,降低氢能利用成本和系统碳排放量,提出一种基于动态偏差信息间隙决策理论(information gap decision theory,IGDT)的综合能源系统(integrated energy system,IES)协调优化策略。首先,在IES中引入混合制氢和富氧燃烧捕集系统,并构建含混合制氢和富氧燃烧捕集系统的IES模型;其次,以总运行成本最低为目标,建立确定性场景下的系统调度模型;再次,针对在处理风荷不确定性问题中传统IGDT决策模型表现出过于保守的问题,提出了基于动态偏差的IGDT决策模型;最后,通过算例结果验证了所提策略能有效提高系统总体经济性,实现了系统低碳经济协调运行。
文摘【目的】考虑系统清洁低碳的前提下,综合能源系统中能源产品定价与市场用户的经济利益和能源运营商的盈利能力密切相关。为此,对含电转气-碳捕集电厂(power to gas-carbon capture power plant,P2G-CCPP)的综合能源系统(integrated energy system,IES)进行㶲经济分析。【方法】从㶲视角出发,兼顾能量的量与质,针对不同能流进行㶲值计算,建立㶲流计算子模型。将系统低碳经济性引入㶲经济分析中,将碳排放权交易成本、碳捕集能耗成本及碳封存成本纳入非能量成本中,建立㶲经济成本分摊子模型。相较于传统定价方法,考虑了碳成本及能量品位差异对系统冷热电单位㶲成本的影响,体现优质优价原则。【结果】仿真算例表明引入P2G-CCPP联动系统能够提高系统低碳减排能力,实现成本合理分摊。【结论】含P2G-CCPP机组的综合能源系统能够有效削减系统总成本及冷热电单位成本,增强了碳利用和燃气生产消费的节能减排途径,具有显著的经济及社会效益。
文摘The capture of atmospheric carbon dioxide by adsorbents is an important strategy to deal with the greenhouse effect.Compared with traditional CO_(2) adsorption materials like activated carbon,silica gel,and zeolite molecular sieves,covalent organic frameworks(COFs)have excellent thermal and chemical stabilities and can be produced in many different forms.Using their different possible construction units,ordered structures for specific applications can be produced,giving them broad prospects in fields such as gas storage.This review analyzes the different types of COFs that have been synthesized and their different methods of CO_(2) capture.It then discusses different ways to increase CO_(2) adsorption by changing the internal structure of COFs and modifying their surfaces.The limitations of COF-derived carbon materials in CO_(2) capture are reviewed and,finally,the key role of machine learning and computational simulation in improving CO_(2) adsorption is mentioned,and the current status and future possible uses of COFs are summarized.
基金Supported by National Key R&D Program of China(2025YFE0109700)the National Natural Science Foundation of China(52106150)。
文摘CO_(2) capture and utilization(CCU)technologies have been recognized as crucial strategies for mitigating global warming,reducing carbon emission,and promoting resource circularity.As such,the design and development of related materials have attracted considerable research attention.Carbon-based materials,characterized by tunable pore structures,abundant active sites,high specific surface area,and excellent chemical stability,demonstrate significant potential for applications in CO_(2) capture and utilization.This review systematically analyzes the adsorption behaviors and performance variations of typical carbon materials,including activated carbon,porous carbon,graphene,and carbon nanotubes during CO_(2) capture processes.Concerning CO_(2) utilization,emphasis is placed on recent advances in the catalytic applications of carbon-based materials in key reactions such as methanation,reverse water-gas shift,dry reforming of methane,and alcohol synthesis.Moreover,the benefits and drawbacks of carbon materials in terms of CO_(2) adsorption capacity,catalytic activity,and stability are thoroughly evaluated,and their potential applications in integrated CO_(2) capture and utilization technologies are discussed.Finally,key strategies for enhancing the performance of carbonaceous materials through structural modulation and surface modification are elucidated.This review aims to provide theoretical guidance for the future development and large-scale implementation of carbon-based materials in CCU technologies.
