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基于自适应粒子群优化算法的串联复合涡轮储能优化策略

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计算机应用 2024年第2期44卷 611-618页

作者：王震张珊珊邬斌扬苏万华天津大学内燃机燃烧学国家重点实验室天津300072

针对发动机串联复合涡轮发电系统储能困难等问题,提出了一种基于自适应粒子群优化(SAPSO)算法的最大功率点追踪(MPPT)方法,增强发电系统功率的捕获能力。此外,采用混合储能系统(HESS)替代单一蓄电池储能,实现电能的高效、稳定存储。通过... 详细信息

针对发动机串联复合涡轮发电系统储能困难等问题,提出了一种基于自适应粒子群优化(SAPSO)算法的最大功率点追踪(MPPT)方法,增强发电系统功率的捕获能力。此外,采用混合储能系统(HESS)替代单一蓄电池储能,实现电能的高效、稳定存储。通过Matlab/Simulink软件,建立了基于发动机串联复合涡轮发电的储能优化控制仿真模型,对比分析了不同控制方法在设定工况下的功率追踪性能以及混合储能系统的储能特性。仿真结果表明,相较于传统扰动观测法(P&O)控制方法,在所提的SAPSO-MPPT方法下,发电功率提高了190 W,响应时间缩短了0.15 s。同时,HESS能够有效追踪母线上的需求功率,电能回收效率高达95.3%。最后,基于Y24型改装发动机台架搭建了串联复合涡轮发电系统实验平台,对所提储能优化控制策略的节油潜力进行了实验验证。结果表明,SAPSO-MPPT+HESS储能优化策略能够有效提高排气能量回收效率,优化后系统总热效率比原发动机提高了提高0.53个百分点。

关键词：自适应粒子群优化算法串联复合涡轮发电系统最大功率点追踪混合储能系统

Experimental study on the effects of HP and LP EGR on thermal efficiency and emissions of a two-stage turbocharged diesel engine

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Science China(Technological Sciences) 2014年第2期57卷 379-389页

作者： wu binyang PU YouZhe YU XiaoYang SU WanHua State Key Laboratory of Engines Tianjin University

An experimental study was performed to compare the effects of high-and low-pressure exhaust gas recirculation loops(HP and LP EGR loops)on thermal efficiency and emissions of a diesel *** were conducted on a 12-L six-cylinder turbocharged diesel engine under various operating *** found that at a low speed of 1100 r/min,1 MPa BMEP,the LP EGR loop could achieve higher brake thermal efficiency and lower emissions than the HP *** is because the lower enthalpy available at the turbine inlet of the HP EGR loop increased the fuel/oxygen equivalence *** the HP EGR,the gross indicated thermal efficiency was reduced by 1%,but pumping losses were only reduced by 0.5%,compared to the LP EGR *** a higher speed of 1600 r/min,1 MPa BMEP,the HP EGR loop attained a higher brake thermal efficiency and lower emissions because of the relatively sufficient flow through the *** the HP EGR loop,the gross indicated thermal efficiency was only reduced by 0.5%and pumping losses were reduced by 1.5%,compared to the LP EGR *** fuel consumption and a longer ignition delay made the distribution of fuel/oxygen equivalence ratio more homogeneous,leading to lower *** data also showed that at the high speed of 1600 r/min,0.55 MPa BMEP,the brake thermal efficiency of the HP EGR loop first increased,then decreased as the EGR rate ***,under all conditions,a reasonable match of both EGR loops could achieve a good balance between fuel consumption and emissions of NOx and soot.

关键词： HP EGR LP EGR two-stage turbocharger system thermal efficiency emissions

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光储系统并网动态容量规划及运行优化研究

电测与仪表 2024年第4期61卷 116-122页

作者：戚艳王旭东陈淑婷聂靖宇邬斌扬苏万华国网天津市电力公司电力科学研究院天津300384 天津大学内燃机燃烧学国家重点实验室天津300072

针对电网中光储系统的容量规划问题,提出了一种考虑电网常规机组运行特性的光储系统并网动态容量规划模型。采用双层模型方法,上层规划以项目投资期间的光储系统、电网常规机组总成本为目标,通过灰狼算法求解,得到光储系统容量配置方案... 详细信息

针对电网中光储系统的容量规划问题,提出了一种考虑电网常规机组运行特性的光储系统并网动态容量规划模型。采用双层模型方法,上层规划以项目投资期间的光储系统、电网常规机组总成本为目标,通过灰狼算法求解,得到光储系统容量配置方案,作为下层模型的输入;下层优化以光储并网后的日运行成本最低为目标,通过MATLAB调用Cplex的分支定界算法求解,得到光伏、蓄电池、电网常规机组调度方案,作为上层模型的输入。上下层循环迭代,直至满足收敛条件,实现光储系统容量的动态规划。最后通过具体算例验证了模型的合理性。算例仿真结果表明,该方法兼顾了电网常规机组能耗,得到了经济性最优的光储系统容量配置方案以及光储并网运行调度策略,从而降低电网的发电成本,提升环境效益。

关键词：光储常规机组容量规划双层模型

考虑[火用]损失的三联供系统容量配置与运行模式研究

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电测与仪表 2024年第1期61卷 113-118页

作者：王剑锋王旭东李峰戚艳邬斌扬苏万华国网天津市电力公司天津300010 天津大学机械工程学院天津300350 国网天津市电力公司电力科学研究院天津300384

节能减排一直是世界各国持续关注的热点问题,综合能源三联供系统因其具有更高的一次能源利用率而被广泛应用。针对综合能源三联供系统的容量配置和运行模式规划问题,提出考虑[火用]损失的综合性能指标作为优化的目标函数,从高效、低碳... 详细信息

节能减排一直是世界各国持续关注的热点问题,综合能源三联供系统因其具有更高的一次能源利用率而被广泛应用。针对综合能源三联供系统的容量配置和运行模式规划问题,提出考虑[火用]损失的综合性能指标作为优化的目标函数,从高效、低碳、经济三个方面进行综合优化。以燃气轮机的容量和运行模式为设计变量,建立综合能源三联供系统容量配置与运行模式研究模型。将此方法应用到某宾馆建筑的联供系统进行分析,研究结果为:燃气轮机的最佳容量为200 kW,热电结合是最优的运行模式。在该模式下综合能源三联供系统较传统供能系统[火用]损失率降低3.5%,年综合碳排量减少593.7 t,年经济成本节约29.8万元。该方法能够全面、客观地分析某容量、某种运行模式下的系统性能,为解决联供系统的运行规划问题提供参考。

关键词：冷、热、电三联供系统运行模式容量配置

Carbon dots confined nanosheets assembled NiCO_(2)S_(4)@CDs cross-stacked architecture for enhanced sodium ion storage

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Chinese Chemical Letters 2024年第7期35卷 508-513页

作者： binyang Qin Mengqi Wang Shimei wu Yining Li Chilin Liu Yufei Zhang Haosen Fan School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China

Na^(+)batteries(SIBs)have been emerging as the most promising candidate for the next generation of secondary ***,the development of high-performance and cost-effective anode materials is urgently needed for the large-scale applications of *** this study,carbon dots confined bimetallic sulfide(NiCO_(2)S_(4))architecture(NiCO_(2)S_(4)@CDs)was proposed and synthesized from assembling nanosheets into cross-stacked superstructure and the subsequent confinement of carbon *** novel decussated structure assembly from nanosheets is greatly beneficial to the structure stability of electrode material during the successive charge/discharge ***,the CDs based carbon conductive network can enhance the electrical conductivity for facilitating the easy transport of electron/Na^(+).Benefitting from these advantages,NiCO_(2)S_(4)@CDs exhibits high-rate performance and an ultralong cycling life in ***,the specific capacity of NiCO_(2)S_(4)@CDs can reach the discharge specific capacity as high as 568.9 mAh/g at 0.5 A/g,which can also maintain 302.7 m Ah/g after 750 cycles at 5.0 A/***,ex-situ characterization techniques such as ex-situ XRD and ex-situ XPS were employed to further explore the sodium storage mechanism of the NiCO_(2)S_(4)@CDs anode.

关键词： Carbon dots Sodium ion batteries NiCo_(2)S_(4)@CDs Cross-stacked architecture Ex-situ XRD and XPS

Physiological Response Mechanism and Drought Resistance Evaluation of Passiflora edulis Sims under Drought Stress

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Phyton-International Journal of Experimental Botany 2024年第6期93卷 1345-1363页

作者： binyang Zhao Fengchan wu Guojun Cai Peiyu Xi Yulin Guo Anding Li College of Forestry Guizhou UniversityGuiyang550025China Guizhou Institute of Biology Guizhou Academy of SciencesGuiyang550009China College of Resources and Environment Hunan Agricultural UniversityChangsha410128China

In order to explore the response mechanism of Passiﬂora edulis Sims to drought stress,the changes in morpho-logical and physiological traits of Passiﬂora edulis Sims under different drought conditions were studied.A total of 7 germplasm resources of Passiﬂora edulis Sims were selected and tested under drought stress by the pot culture method under 4 treatment levels:75%–80%(Control,CK)of maximumﬁeld water capacity,55%–60%(Light Drought,LD)of maximumﬁeld water capacity,i.e.,mild drought,40%–45%(Moderate Drought,MD)of max-imumﬁeld water capacity,i.e.,moderate drought and 30%–35%(Severe Drought,SD)of maximumﬁeld water capacity,i.e.,severe *** the 40th day of drought treatment,13 indices,including seedling growth mor-phology,physiology,and biochemistry,were *** results showed that under drought stress,the height and ground diameter of *** Sims gradually decreased with increasing drought stress,and there were signiﬁ-cant differences in seedling height and ground diameter among the *** stress signiﬁcantly inhib-ited the growth of seven *** Sims *** contents of soluble sugar(SS),soluble protein(SP),proline(Pro),and other substances in *** Sims basically increased with increasing drought *** the aggrava-tion of drought stress,the malondialdehyde(MDA)content of *** Sims tended to increase to different degrees,the superoxide dismutase(SOD)activity and peroxidase(POD)activity both tended to increase atﬁrst and then decrease,and the change in catalase(CAT)activity mostly showed a gradual increasing *** con-tents of endogenous hormones in *** Sims signiﬁcantly differed under different degrees of drought *** the aggravation of drought stress,the abscisic acid(ABA)content of *** Sims tended to increase,whereas the contents of gibberellin(GA),indoleacetic acid(IAA),and zeatin nucleoside(ZR)exhibited a down-ward trend.A comprehensive evaluation of the drought resistance of seven *** Sim

关键词： Drought resistance water stress phytohormone morphological trait physiological traits

Low-temperature-pyrolysis preparation of nanostructured graphite towards rapid potassium storage with high initial Coulombic efficiency

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Nano Research 2024年第6期17卷 5138-5147页

作者： Jingke Ren Boyu Xing Wen Luo binyang Luo Xinfei wu Xin Yan Wencong Feng Feiyue Wang Chaojie Cheng Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Physics School of ScienceWuhan University of TechnologyWuhan 430070China

Industrially prepared artificial graphite(AG)is attractive for potassium-ion batteries(PIBs),but its rate performance is poor and the production process is energy intensive,so developing an efficient strategy to produce novel graphite with low energy consumption and high performance is economically ***,a nanostructured graphite composed of multi-walled carbon nanotubes(MWCNTs)and graphite shells was prepared by one-pot method through low-temperature pyrolysis of iron-based metal-organic framework(MOF)and carbon *** high graphitization degree of nanostructured graphite makes the initial Coulombic efficiency(ICE)exceed 80%,and the three-dimensional(3D)conductive network ensures a specific capacity of 234 mAh·g^(−1)after 1000 cycles at a high current density of 500 mA·g^(−1).In addition,the typical graphite potassium storage mechanism is also demonstrated by in situ X-ray diffraction(XRD)and in situ Raman spectroscopy,and its practicality is also proved by the voltage of the full *** work provides a feasible way to optimize the practical production process of AG and expand its application in energy storage.

关键词： graphite anode potassium-ion batteries high graphitization degree low-temperature pyrolysis initial Coulombic efficiency

柴油微引燃天然气发动机中高负荷QHCCI燃烧试验

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内燃机学报 2022年第6期40卷 481-488页

作者：刘亚龙毋波邬斌扬苏万华天津大学内燃机燃烧学国家重点实验室天津300350

柴油微引燃天然气发动机准均质充量压燃着火(QHCCI)燃烧具有低碳、高效、清洁运行的潜力.通过一台潍柴WP12改造的柴油微引燃天然气发动机,探究了废气再循环(EGR)、进气门晚关(LIVC)、引燃柴油喷射定时和燃氧当量比φ_(o)在大、中负荷工... 详细信息

柴油微引燃天然气发动机准均质充量压燃着火(QHCCI)燃烧具有低碳、高效、清洁运行的潜力.通过一台潍柴WP12改造的柴油微引燃天然气发动机,探究了废气再循环(EGR)、进气门晚关(LIVC)、引燃柴油喷射定时和燃氧当量比φ_(o)在大、中负荷工况下对天然气QHCCI的影响.结果表明:大负荷下提高EGR率,有利于QHCCI向更高负荷拓展,但会降低缸内工质比热比,不利于总指示热效率(ITE_(g))提高;通过LIVC技术,降低有效压缩比,避免粗爆燃烧,也有利于QHCCI向大负荷拓展.通过采用LIVC技术结合低EGR率的技术可使QHCCI在大负荷下高效燃烧,经优化后,在低转速、大负荷工况、p_(in)=0.30 MPa、φ_(o)=0.79、EGR率为15%、引燃柴油喷射能量为3%和引燃柴油喷射定时为-3°CA ATDC的条件下,ITE_(g)达到47.50%.中等负荷下,通过引燃柴油喷射定时与φ_(o)的协同控制可对燃烧相位和燃烧速率进行优化,最后在p_(in)=0.18 MPa、φ_(o)=0.50、EGR率为0%、引燃柴油喷射能量为5%且引燃柴油喷射定时为-10°CA ATDC的条件下,ITE_(g)达到49.79%.

关键词：天然气发动机柴油微引燃准均质充量压燃着火燃烧相位燃烧速率

柴油机WHTC冷起动过程SCR温度热管理技术研究

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内燃机工程 2017年第6期38卷 145-151页

作者：刘光义孙德增邬斌扬苏万华天津大学内燃机燃烧学国家重点实验室天津300072

研究了低速低负荷工况下可变几何截面增压器(variable geometry turbocharger,VGT)开度、进气门晚关机构(retard intake valve closing auction,RIVCA)和后喷技术对提升选择性催化还原(selective catalytic reduction,SCR)后处理器温度的作用,并从温度提升幅度、发动机油耗率和排放等方面对各技术进行了分析比较。试验结果表明,采用后喷技术、增大VGT开度和利用进气门晚关可以有效提高SCR后处理器温度。但相比于后喷技术,增大VGT开度和运用进气门晚关技术造成的油耗损失较小。试验对后喷策略和VGT-RIVCA策略进行了全球统一瞬态试验循环(world harmonized transient cycle,WHTC)冷起动对比试验。试验结果显示,在使SCR后处理器的起燃时间缩减至循环第600s附近时,后喷策略造成的油耗损失为3.5%,而VGT-RIVCA策略造成的油耗损失仅为1.1%。在验证了VGT控制策略的优越性后,通过设定不同VGT开度的对比试验,最终得到了一套优化的VGT-RIVCA控制策略,运用该策略可以使SCR后处理器的起燃时间由1 300s缩减至540s,NOx排放量由1.78g/(kW·h)降低至0.929g/(kW·h),同时发动机油耗仅有1.4%的恶化。

关键词：排气热管理 SCR温度控制 SCR转化效率 WHTC测试循环排放