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储能式低温空分系统热力学与经济性分析

化工学报 2024年第7期75卷 2409-2421页

作者：秦晓巧谭宏博温娜西安交通大学制冷与低温工程系陕西西安710049

低温空气分离设备是大型化工系统的高耗能环节,若与液态空气储能技术相结合,可有效平衡电网峰谷负荷,显著提高系统的经济效益。提出了一种储能式低温空分系统(ASU-ESG),利用谷电制取液态空气并储存,在峰电期内液态空气膨胀发电并参与低... 详细信息

低温空气分离设备是大型化工系统的高耗能环节,若与液态空气储能技术相结合,可有效平衡电网峰谷负荷,显著提高系统的经济效益。提出了一种储能式低温空分系统(ASU-ESG),利用谷电制取液态空气并储存,在峰电期内液态空气膨胀发电并参与低温精馏。此方案可有效降低系统在用电峰时的压缩负荷和电力成本,改善空分装置的负荷调节能力。研究结果表明,空气处理量为60000 m^(3)/h的ASU-ESG系统的日均制氧压缩功比功耗为0.378 kW·h/m^(3),储能和释能过程氧提取率分别为89.46%和93.71%。相比常规ASU系统,该系统的谷时压缩负荷提高了28%,峰时压缩负荷降低了20%,可节约年度用电成本5.72%~6.88%,动态回收期仅为3.3~4.3年,全生命周期净现值可达(19714.6~28074.7)万元。本系统可平衡电网峰谷波动,并利用电价差显著提高系统的经济效益。

关键词：空气分离液态空气储能动态回收期

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储能的低温空气分离系统热力学与经济性分析

西安交通大学学报 2024年第9期58卷 1-10页

作者：秦晓巧谭宏博温娜刘伟明西安交通大学制冷与低温工程系西安710049 陕西鼓风机(集团)有限公司西安710082

为探索低温空气分离系统(ASU)进行电力需求错峰运行的可行性,将传统空气分离技术与液态空气储能技术(LAES)结合,在谷电期先将富余空气压缩、液化、储存,在峰电期将液态空气作为精馏原料补充到精馏塔,以提高谷时压缩用电负荷、降低峰时... 详细信息

为探索低温空气分离系统(ASU)进行电力需求错峰运行的可行性,将传统空气分离技术与液态空气储能技术(LAES)结合,在谷电期先将富余空气压缩、液化、储存,在峰电期将液态空气作为精馏原料补充到精馏塔,以提高谷时压缩用电负荷、降低峰时压缩用电负荷。与传统空气分离系统相比,氧气产品的标准状态体积流量为10165m^(3)/h的低温空气分离储能系统(ASU-LAES)可将压缩能耗的20%由电网高峰时段转移到低谷时段,年度用电成本可减少1.3%~6.8%。ASU-LAES系统的制氧单位压缩能耗为0.349kW·h/m^(3),设备投资成本为4034.8万元,动态回收期为4.6~5.2a。ASU-LAES方案可缓解电网高峰负荷用电压力,充分利用峰谷分时电价政策优势,可创造良好的经济效益。

关键词：空气分离液态空气储能设备投资动态回收期

数据要素驱动新质生产力:理论逻辑、现实挑战和推进路径

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价格理论与实践 2024年第5期 39-44,145页

作者：谭洪波(译) 耿志超中国社会科学院财经战略研究院中国社会科学院大学应用经济学院

在数字经济背景下,数据是形成新质生产力的优质生产要素,在培育和发展新质生产力过程中发挥了重要作用。本文论述了数据要素在驱动新质生产力发展过程中的关键作用,指出数据已成为驱动创新、重塑生产方式的核心力量。具体而言,数据要素... 详细信息

在数字经济背景下,数据是形成新质生产力的优质生产要素,在培育和发展新质生产力过程中发挥了重要作用。本文论述了数据要素在驱动新质生产力发展过程中的关键作用,指出数据已成为驱动创新、重塑生产方式的核心力量。具体而言,数据要素不仅塑造了新型劳动者、催生出新质劳动资料、孕育出新质劳动对象,还促进了以上新质生产力要素的优化组合。但这一“创造性破坏”和“创造性转型”过程也伴随着对劳动者综合能力要求提高、劳动资料更新带来转型困境、劳动要素的循环流转存在阻滞、数据生态建设的系统性挑战等问题。为解决上述问题,本文进一步提出数据要素驱动新质生产力的推进路径,具体包括:优化教育内容体系,提升劳动者综合能力;鼓励企业数字化改造,加大金融支持;完善数据要素市场,培育专业数据服务机构;完善科技创新体系,促进数字生态系统建设。

关键词：数据要素新质生产力新型劳动者

Numerical study of the deep removal of R134a from non-condensable gas mixture by cryogenic condensation and de-sublimation

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Chinese Journal of Chemical Engineering 2023年第9期61卷 180-191页

作者： hongbo tan Boshi Shao Na Wen Department of Refrigeration and Cryogenic Engineering School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an 710049China

Nowadays,the limits on greenhouse gas emissions are becoming increasingly *** present research,a two-dimensional numerical model was established to simulate the deep removal of 1,1,1,2-tetrafluoroethane(R134a)from the non-condensable gas(NCG)mixture by cryogenic condensation and *** wall condensation method was compiled into the Fluent software to calculate the condensation of R134a from the gas ***,the saturated thermodynamic properties of R134a under its triple point were extrapolated by the equation of *** simulation of the steam condensation with NCG was conducted to verify the validity of the model,the results matched well with the experimental ***,the condensation characteristics of R134a with NCG and the thermodynamic parameters affecting condensation were *** results show that the section with relatively higher removal efficiency is usually near the *** cold wall temperature has a great influence on the R134a removal performance,e.g.,a 15 K reduction of the wall temperature brings a reduction in the outlet R134a molar fraction by 85.43%.The effect of changing mass flow rate on R134a removal is mainly reflected at the outlet,where an increase in mass flow rate of 12.6% can aggravate the outlet molar fraction to 210.3% of the *** research can provide a valuable reference for the simulation of the deep removal of various low-concentration gas using condensation and de-sublimation methods.

关键词： Numerical simulation Greenhouse gas Condensation De-sublimation Vapor deep removal Non-condensable gas

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化学外加剂对粉煤灰湿法细化活化的影响

材料导报 2024年第5期38卷 184-190页

作者：谭洪波孔祥辉贺行洋李懋高苏英蹇守卫杨进武汉理工大学硅酸盐建筑材料国家重点实验室武汉430070 湖北工业大学土木建筑与环境学院武汉430064

将粉煤灰(FA)作为矿物掺合料使用,是降低胶凝材料碳排放的重要手段之一,但其早期活性低是学者们普遍关注的问题。本研究提出在湿磨过程中引入化学功能组分来提升FA细化活化效率的技术思路;通过激光粒度仪(PSD)、pH仪、全谱直读等离子体... 详细信息

将粉煤灰(FA)作为矿物掺合料使用,是降低胶凝材料碳排放的重要手段之一,但其早期活性低是学者们普遍关注的问题。本研究提出在湿磨过程中引入化学功能组分来提升FA细化活化效率的技术思路;通过激光粒度仪(PSD)、pH仪、全谱直读等离子体发射光谱仪(ICP)、XRD、SEM和TG-DTG等测试手段评价了FA的物化性能及活性指数,揭示了液相研磨机械力和化学溶蚀协同作用机理。结果表明:引入TIPA、TEA、NaOH、Na_(2)SO_(4)及电石渣(CS)化学功能组分优化了湿磨的液相环境介质,可显著提升湿磨效率;当FA的中值粒径降低至2μm时,TIPA+CS作用效果最为显著,研磨时间由原来的120 min缩短至40 min,缩短67%。从活性指数的角度来看,1 d龄期时,Na_(2)SO_(4)作用效果最为显著,湿磨FA的活性指数达到60.1%;3 d、7 d、28 d龄期时,TIPA+CS作用效果较好,湿磨FA的活性指数分别可达到81.3%、89.1%、97%。在液相研磨机械力作用过程中,液相环境介质可溶蚀粉煤灰表面,促进表面[AlO_(4)]和[SiO_(4)]的解聚,加速离子溶出,形成钙矾石、C-S-H凝胶等水化产物,显著提升FA的湿磨细化活化效率。

关键词：粉煤灰湿法研磨液相环境掺合料活性指数

Ferro-vanadium Slag in Improving Inner Chloride Solidification Rate of Cement Materials

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Journal of Wuhan University of Technology(Materials Science) 2023年第5期38卷 1065-1076页

作者： CHEN Pian MA Baoguo tan hongbo LIU Xiaohai State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450052China

We investigated the effects of ferro-vanadium slag(FVS)as a supplemental cementing material which can dissolve a large amount of active aluminum phases without excessive pretreatment or excitation to enhance the inner chloride solidified rate(CSR)of cement-based ***-FVS pastes with 0-30%content of FVS was designed,and the CSR was *** at different curing ages were studied by X-ray diffraction(XRD)and thermo-gravimetric analysis(TGA);hydration heat and^(29)Si nuclear magnetic resonance(^(29)Si-NMR)were tested to analyze the hydration degree of the system;mechanical properties in cement-FVS system were evaluated by compressive strength test,pore structure and the fractal *** revealed that the incorporation of FVS could greatly promote the CSR of cement-FVS *** with the control groups,30%dosage of FVS could increase the CSR by 69%at 3 d,47%at 7d,36%at 28 d and 34%at 60 *** was demonstrated that the incorporation of FVS could enhance the chemical solidifying ability of chloride,and the main reason was the promoted generation of Kuzel’s salt and the Friedel’s salt in hydrate products,and the enhanced chloride migration resistance capacity by increasing the volume of gel pores in the cement-FVS *** the influence of FVS on strength performance,this paper suggested that the suitable dosage of FVS as a supplemental cementing material was around 10%.The study in this paper might provide one efficient path to promote the chloride solidifying capacity of cement-based material and meanwhile the comprehensive utilization of FVS.

关键词： ferro-vanadium slag chloride solidified rate cement-FvS system Friedel's salt Kuzel's salt

Influences of the heterogeneity of viscoelastic medium on postseismic deformation of the 2008 M_(W) 7.9 Wenchuan earthquake

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Geodesy and Geodynamics 2022年第1期13卷 1-10页

作者： Feng Li Peng Zhai Jinshui Huang hongbo tan Mengcheng National Geophysical Observatory School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei230026China Earthquake Administration of Jiangsu Province Nanjing210014China CAS Center for Excellence in Comparative Planetology Hefei230026China

The study of postseismic deformation is important for constraining the viscoelastic properties of the Earth and inverting the post-earthquake *** levelling survey revealed that the area near Bei-chuan elevated 5.3 cm about two years after the M_(W) 7.9 Wenchuan earthquake(05/12/2008),during which the area underwent significant downward *** GPS horizontal displacements showed a non-monotonic variation after the Wenchuan *** this study,a 3-D viscoelastic finite element model is employed to simulate the coseismic and postseismic deformation of the Wenchuan *** numerical simulations show that the lateral heterogeneity across the Longmenshan fault plays an important role in the postseismic *** results reveal that the coseismic defor-mation is not sensitive to the horizontal heterogeneity,but the postseismic deformation is sensitive to *** postseismic deformation of the horizontally heterogeneous model is generally consistent with the observations of all geodetic surveys,such as GPS,InSAR and levelling,but not for the horizontally homogenous *** also find that the non-monotonous variation of the postseismic deformation of the Wenchuan earthquake could be explained by a viscoelastic relaxation model with lateral heterogeneous medium across the Longmenshan fault.

关键词： M_(W)7.9 Wenchuan earthquake Postseismic deformation Viscoelastic relaxation Horizontal heterogeneity Three-dimensional finite element

仲-正氢转化对蒸气冷屏组合结构绝热性能提升研究

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真空与低温 2024年第4期30卷 382-391页

作者：许张良谭宏博吴昊西安交通大学制冷与低温技术研究所西安710049

为探究蒸气冷屏-变密度多层绝热组合绝热结构中耦合不同仲-正氢转化类型对液氢储罐绝热性能的提升效果,建立了采用连续转化与绝热转化的组合绝热结构稳态传热模型,并分析了蒸气冷屏屏位与仲-正氢转化器位置对组合绝热结构性能的影响。... 详细信息

为探究蒸气冷屏-变密度多层绝热组合绝热结构中耦合不同仲-正氢转化类型对液氢储罐绝热性能的提升效果,建立了采用连续转化与绝热转化的组合绝热结构稳态传热模型,并分析了蒸气冷屏屏位与仲-正氢转化器位置对组合绝热结构性能的影响。研究表明:与绝热转化相比,采用连续转化时绝热结构的性能更优,其最小漏热热流密度为0.117 5 W·m^(-2),与不采用仲-正氢转化相比减少了13.48%;若采用绝热转化,当仲-正氢转化器到VCS盘管入口的距离与盘管总长度之比为30%~77.5%时,漏热热流密度达到最小值0.121 0 W·m^(-2),比不采用仲-正氢转化减少了10.30%;转化器安装在盘管中间附近位置,可提高绝热转化的起始温度与仲-正氢转化吸热量,对抵消外界热流、改善绝热性能有益。研究结果为液氢温区组合绝热结构的设计提供定量的理论依据和技术指导。

关键词：蒸气冷屏变密度多层绝热仲-正氢转化绝热性能转化器位置

Effect of Different Kinds of Zinc (Ⅱ) on Early Hydration of Calcium Aluminate Cement

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Journal of Wuhan University of Technology(Materials Science) 2020年第5期35卷 925-929页

作者： WANG Jingran ZHANG Jinhua tan hongbo MA Baoguo The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081China State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China

The early hydration of calcium aluminate cement (CAC) with different kinds of zinc (II),such as ZnSO4g7H2O,ZnO,Zn(NO3)2·6H2O and ZnCl2,was *** in consistency,setting time,hydration heat flow,hydration heat amount,ion concentration in solution,and hydration products were found upon the addition of different Zn^2+.The water consumption of standard consistency of CAC is decreased with different Zn^2+.Zn^2+ can delay the initial hydration of *** induction period of cement with Zn^2+ is longer than that of CAC,especially the reaction time of the acceleration period is ***^2+ can promote hydration hydrate of CAC at 24 *** characteristic diffraction peaks of CA and CA2 in CAC with different Zn^2+ are significantly *** can inhibit the formation of CAH10 and promote the formation C3AH6 and AH3 in hydration products at 24 h.

关键词： zinc calcium aluminate cement ion concentration hydration