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Thermo-economic analysis of a direct supercritical CO_(2) electric power generation system using geothermal heat

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Frontiers in Energy 2022年第2期16卷 246-262页

作者： xingchao wang Chunjian PAN Carlos EROMERO Zongliang QIAO Arindam BANERJEE Carlos RUBIO-MAYA Lehua PAN Department of Mechanical Engineering Colorado School of MinesGoldenCO 80401USA National Renewable Energy Laboratory(NREL) GoldenCO 80401USA Energy Research Center Lehigh UniversityBethlehemPA 18015USA Key Laboratory of Energy Thermal Conversion and Control of the Ministry of Education Southeast UniversityNanjing 210096China Department of Mechanical Engineering and Mechanics Lehigh UniversityBethlehemPA 18015USA Mechanical Engineering Universidad Michoacán de San Nicolas de HidalgoMoreliaMichoacán C.P.58030Mexico Energy Geosciences Division Lawrence Berkeley National LaboratoryUniversity of CaliforniaBerkeleyCA 94720USA

A comprehensive thermo-economic model combining a geothermal heat mining system and a direct supercritical CO_(2) turbine expansion electric power generation system was proposed in this *** by this integrated model,thermo-economic and optimization analyses for the key design parameters of the whole system including the geothermal well pattern and operational conditions were performed to obtain a minimal levelized cost of electricity(LCOE).Specifically,in geothermal heat extraction simulation,an integrated wellbore-reservoir system model(T2Well/ECO_(2)N)was used to generate a database for creating a fast,predictive,and compatible geothermal heat mining model by employing a response surface methodology.A parametric study was conducted to demonstrate the impact of turbine discharge pressure,injection and production well distance,CO_(2) injection flowrate,CO_(2) injection temperature,and monitored production well bottom pressure on LCOE,system thermal efficiency,and capital *** was found that for a 100 MWe power plant,a minimal LCOE of$0.177/kWh was achieved for a 20-year steady operation without considering CO_(2) sequestration *** addition,when CO_(2) sequestration credit is$1.00/t,an LCOE breakeven point compared to a conventional geothermal power plant is achieved and a breakpoint for generating electric power generation at no cost was achieved for a sequestration credit of $2.05/t.

关键词： geothermal heat mining supercritical CO_(2) power generation thermo-economic analysis optimization

Collaborative manufacturing technologies of structure shape and surface integrity for complex thin-walled components of aero-engine:Status,challenge and tendency

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Chinese Journal of Aeronautics 2023年第7期36卷 1-24页

作者： Biao ZHAO Wenfeng DING Zhongde SHAN Jun wang Changfeng YAO Zhengcai ZHAO Jia LIU Shihong XIAO Yue DING Xiaowei TANG xingchao wang Yufeng wang Xin wang College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China School of Mechanical Engineering Northwestern Polytechnical UniversityXi’an 710072China AVIC Manufacturing Technology Institute Beijing 100024China School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China AECC Shenyang Liming Aero-engine Co. LTD.Shenyang 110000China

Presently,the service performance of new-generation high-tech equipment is directly affected by the manufacturing quality of complex thin-walled components.A high-efficiency and quality manufacturing of these complex thin-walled components creates a bottleneck that needs to be solved urgently in machinery *** address this problem,the collaborative manufacturing of structure shape and surface integrity has emerged as a new process that can shorten processing cycles,improve machining qualities,and reduce *** paper summarises the research status on the material removal mechanism,precision control of structure shape,machined surface integrity control and intelligent process control technology of complex thin-walled *** solutions and technical approaches are then put forward to solve the critical problems in the high-performance manufacturing of complex thin-wall *** development status,challenge and tendency of collaborative manufacturing technologies in the high-efficiency and quality manufacturing of complex thin-wall components is also discussed.

关键词： Collaborative manufacturing of shape and performance Complex thin-walled component Intelligent process control Material removal mechanism Surface integrity

N-doped porous carbon nanofibers sheathed pumpkin-like Si/C composites as free-standing anodes for lithium-ion batteries

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Journal of Energy Chemistry 2021年第3期30卷 727-735页

作者： Yanfei Zeng Yudai Huang Niantao Liu xingchao wang Yue Zhang Yong Guo Hong-Hui Wu Huixin Chen Xincun Tang Qiaobao Zhang Key Laboratory of Energy Materials Chemistry Ministry of EducationKey Laboratory of Advanced Functional MaterialsAutonomous RegionInstitute of Applied ChemistryCollege of ChemistryXinjiang UniversityUrumqi 830046XinjiangChina Department of Materials Science and Engineering College of MaterialsXiamen UniversityXiamen 361005FujianChina Beijing Advanced Innovation Center for Materials Genome Engineering School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China School of Chemistry and Chemical Engineering Central South UniversityChangsha 410083HunanChina Xiamen Institute of Rare Earth Materials Haixi InstitutesChinese Academy of SciencesXiamen 361024FujianChina

Dramatic capacity fading and poor rate performance are two main obstacles that severely hamper the widespread application of the Si anode owing to its large volume variation during cycling and low intrinsic electrical *** mitigate these issues,free-standing N-doped porous carbon nanofibers sheathed pumpkin-like Si/C composites(Si/C-ZIF-8/CNFs)are designed and synthesized by electrospinning and carbonization methods,which present greatly enhanced electrochemical properties for lithium-ion battery *** particular structure alleviates the volume variation,promotes the formation of stable solid electrolyte interphase(SEI)film,and improves the electrical *** a result,the as-obtained free-standing Si/C-ZIF-8/CNFs electrode delivers a high reversible capacity of 945.5 mAh g^(-1) at 0.2 A g^(-1) with a capacity retention of 64% for 150 cycles,and exhibits a reversible capacity of 538.6 mA h g^(-1) at 0.5 A g^(-1) over 500 ***,the full cell composed of a freestanding Si/C-ZIF-8/CNFs anode and commercial LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)(NCM)cathode shows a capacity of 63.4 mA h g^(-1) after 100 cycles at 0.2 C,which corresponds to a capacity retention of 60%.This rational design could provide a new path for the development of high-performance Si-based anodes.

关键词： Pumpkin-like silicon/carbon composites N-doped porous carbon nanofibers Free-standing anode Lithium-ion batteries

Pressureless all-solid-state Na/S batteries with self-supporting Na_(5)YSi_(4)O_(12) scaffolds

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Carbon Energy 2023年第12期5卷 97-110页

作者： Aikai Yang Ruijie Ye Huimin Song Qiongqiong Lu xingchao wang Enkhtsetseg Dashjav Kai Yao Daniel Grüner Qianli Ma Frank Tietz Olivier Guillon Forschungszentrum Jülich GmbH Institute of Energy and Climate Research(IEK-1)JülichGermany Institute of Mineral Engineering(GHI) RWTH Aachen UniversityAachenGermany Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials School of Materials Science and EngineeringPeking UniversityBeijingChina Institute of Materials Henan Academy of SciencesZhengzhouHenanChina Henan Key Laboratory of Advanced Conductor Materials ZhengzhouHenanChina State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources Key Laboratory of Advanced Functional MaterialsAutonomous RegionInstitute of Applied ChemistryCollege of ChemistryXinjiang UniversityUrumqiXinjiangChina Forschungszentrum Jülich GmbH Institute of Energy and Climate Research(IEK-2)JülichGermany Jülich Aachen Research Alliance JARA-EnergyJülichGermany

The development of reliable and affordable all-solid-state sodium metal batteries(ASS-SMBs)requires suitable solid-state electrolytes with cost-efficient processing and stabilized electrode/electrolyte ***,an integrated porous/dense/porous Na_(5)YSi_(4)O_(12)(NYS)trilayered scaffold is designed and fabricated by tape casting using aqueous *** this template-based NYS scaffold,the dense layer in the middle serves as a separator and the porous layers on both sides accommodate the active materials with their volume changes during the charge/discharge processes,increasing the contact area and thus enhancing the utilization rate and homogenizing the current *** Na/NYS/Na symmetric cells with the Pb-coated NYS scaffold exhibit significantly reduced interfacial impedance and superior critical current density of up to 3.0 mA cm^(-2)against Na metal owing to enhanced ***,the assembled Na/NYS/S full cells operated without external pressure at room temperature showed a high initial discharge capacity of 970 mAh g^(-1)and good cycling stability with a capacity of 600 mAh g^(-1)after 150 cycles(based on the mass of sulfur).This approach paves the way for the realization of economical and practical ASS-SMBs from the perspective of ceramic manufacturing.

关键词： Na/S batteries Na_(5)YSi_(4)O_(12) scaffold solid-state electrolytes tape casting

Electrolyte solvation chemistry to construct an anion-tuned interphase for stable high-temperature lithium metal batteries

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eScience 2023年第4期3卷 81-88页

作者： Jiahang Chen Yang Zhang Huichao Lu Juan Ding xingchao wang Yudai Huang Huiyang Ma Jiulin wang State Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resources College of ChemistryXinjiang UniversityUrumqi830046XinjiangPR China Department of Chemical Engineering Shanghai Jiao Tong UniversityShanghai200240PR China College of Chemistry Zhengzhou UniversityHenan450001PR China

Lithium metal batteries are regarded as promising alternative next-generation energy storage ***,the unstable anode interphase results in dendrite growth and irreversible lithium consumption with low Coulombic efficiency(CE).Herein,we rationally design a Li^(+)coordination structure via electrolyte solvation *** anions are aggregated in the solvation sheath,even at low concentration in a solvent with moderate solvation ability,which promotes Li^(+)desolvation and constructs a nitrate anion-tuned ***,a high-donor-number solvent is introduced as an additive to strongly coordinate with Li^(+),which accelerates the ion-transfer kinetics and rate *** not only results in micro-sized lithium deposition and a high CE of 99.5%over 3500 h,but also enables superior anode stability even under 50%depth plating/stripping and with a lean electrolyte of 3 g Ah^(-1)at 50℃.A lithium-sulfur battery exhibits a prolonged lifespan of 2000 cycles with an average CE of 100%.A full battery using 1x excess lithium exhibits a high capacity near 1600 mAh g S^(-1)for 100 cycles without capacity ***,a 0.55 Ah pouch cell delivers a reversible energy density of 423 Wh kg^(-1)based on these electrodes and electrolyte.

关键词： Lithium metal anode Solvation chemistry Anode interphase Coulombic efficiency High energy density

Extraction of selected rare earth elements from anthracite acid mine drainage using supercritical CO2 via coagulation and complexation

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Journal of Rare Earths 2021年第1期39卷 83-89,I0004页

作者： Guanrong Song xingchao wang Carlos Romero Huazhi Chen Zheng Yao Alfred Kaziunas Rolf Schlake Madhu Anand Tom Lowe Greg Driscoll Boyd Kreglow Harold Schobert Jonas Baltrusaitis Energy Research Center Lehigh University117 ATLSS Dr.BethlehemPA18015USA Applied Separations Inc. 930 Hamilton StreetAllentownPA18101USA Blaschak Coal Corporation 1166 W Centre StMahanoy CityPA17948USA Department of Chemical and Biomolecular Engineering Lehigh University111 Research Dr.Bethlehem.PA.18015USA

Rare earth elements(REEs)are valuable raw materials which are in great demand in modern high technology *** methods to produce/recover REEs from waste is significant to the national security of any developed *** study was focused on investigating the use of supercritical CO2(sCO2)to extract REEs from anthracite acid mine drainage(AMD).Four different mine drainage water source locations at Blaschak Coal *** Pennsylvania,USA were selected for sample *** extraction process was developed and demonstrated for two of those water sources containing the highest concentration of REEs.A method involving metal ion coagulation,their dissolution from the sludge into a concentrated aqueous HNO3 solution,complexation with organic ligands and sCO2 extraction was developed to recover REEs from ***,sodium aluminate(NaAlO2)was used as the coagulant to concentrate REEs from the AMD into a solid ***,over 99%of the REEs in AMD is concentrated in the remaining *** the coagulation process,the effects of pH and NaAlO2 concentration on REE precipitation were *** nitric acid(HNO3)was used to digest the pre-concentrated sludge and tributyl phosphate(TBP)was used to form REE/TBP/HNO3,a non-polar complex with selected REEs,specifically,cerium(Ce),lanthanum(La)and neodymium(Nd).HNO3 concentration and organic/aqueous phase ratio were considered as the variables to improve complexation *** extraction experiments using sCO2 and REE/TBP/HNO3 solutions were then conducted at optimal conditions of 60℃and 20 *** overall REE extraction efficiencies are found to increase with the atomic number of the *** a result,the average overall REE extraction efficiencies of 41.8%,40.1%and 58.2%for Ce,La and Nd,respectively,are *** potential improvements in the overall extraction efficiency are also discussed.

关键词： Supercritical CO2 extraction Rare earth elements Acid mine drainage

Core-shell structured 1,4-benzoquinone@TiO_2 cathode for lithium batteries

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Journal of Energy Chemistry 2018年第6期27卷 1644-1650页

作者： Aikai Yang xingchao wang Yong Lu Licheng Miao Wei Xie Jun Chen Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) College of Chemistry Nankai University

Organic carbonyl compounds are considered as promising candidates for lithium batteries due to theirhigh capacity and environmental friendliness, However, they suffer from serious dissolution in the elec-trolyte, leading to fast capacity decay. Here we report core-shell structured 1,4-benzoquinone@titaniumdioxide （BQ@TiO2） composite as cathode for lithium batteries. The composite cathode can deliver a highdischarge capacity of 441.2 mA h/g at 50 mA/g and a high capacity retention of 80.7% after 100 cycles. Thegood cycling performance of BQ@TiO2 composite can be attributed to the suppressed dissolution of BQ,which results from the physical confinement effect of Ti02 shell and the strong interactions between BQand Ti02. Moreover, the combination of ex situ infrared spectra and density functional theory calculationsreveals that the active redox sites of BQ are carbonyl groups. This work provides an alternative way tomitigate the dissolution of small carbonyl compounds and thus enhance their cycling stability.

关键词： Lithium batteries Organic cathode Benzoquinone Titanium dioxide Core-shell structure Density functional theory

Complete resection of cavernous malformations in the hypothalamus:A case report and review of the literature

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Translational Neuroscience and Clinics 2016年第3期2卷 199-202页

作者： xingchao wang Zhenmin wang Zhixian Gao Pinan Liu Department of Neurosurgery Beijing Tiantan Hospital Capital Medical University Department of Neural Reconstruction Beijing Neurosurgery Institute Capital Medical University

Objective: Cavernous malformation(CM) originating from the hypothalamus is extremely rare and the deep location presents a challenge for its neurosurgical management. We report such a case to better understand its clinical features. Methods and Results: A 40-year-old male patient presented with impaired vision in the left eye. Magnetic resonance imaging(MRI) revealed a regularly shaped round lesion located in the suprasellar cistern, and a clinical diagnosis of hypothalamic CM was made. Complete microsurgical excision was performed via a right pterional craniotomy. The patient showed good recovery with no further visual acuity or field deficits postoperatively. No CM recurrence or rebleeding was seen on follow-up MRI scans performed over the course of two years. Conclusions: For patients with cavernous malformation in the hypothalamus, accurate preoperative diagnosis with complete surgical removal by an appropriate surgical approach can contribute to satisfactory outcomes.

关键词： cavernous malformation deep-location hypothalamus surgery

Real-Time Slice-to-Volume Registration-Based Autonomous Navigation for Robot-Assisted Thyroid Biopsy

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Journal of Shanghai Jiaotong university(Science) 2023年第3期28卷 330-338页

作者：李坚王星超钟敏郑剑孙正隆 School of Science and Engineering The Chinese University of Hong KongShenzhen 518172GuangdongChina Longgang District People’s Hospital Shenzhen 518172GuangdongChina

With advancements in medical imaging and robotic technology,the idea of fully autonomous diagnosis and treatment has become appealing,from ethereal to *** to its characteristics of non-invasiveness,non-radiation,and fast imaging speed,ultrasonography has been increasingly used in clinical practice,such as in obstetrics,gynecology,and surgical *** this paper,we propose a real-time image-based visual servo control scheme using a hybrid slice-to-volume registration *** this manner,the robot can autonomously locate the ultrasound probe to the desired posture according to preoperational planning,even in the presence of *** experiments are designed and conducted using a thyroid biopsy phantom *** results show that the proposed scheme can achieve a refresh rate of up to 30 Hz and a tracking accuracy of(0.52±0.65)mm.

关键词： slice-to-volume registration autonomous navigation thyroid biopsy