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Heat Aggregation Mechanisms of Hot Dry Rocks Resources in the Gonghe Basin, Northeastern Tibetan Plateau

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Acta Geologica Sinica(English Edition) 2021年第6期95卷 1793-1804页

作者： LIN Wenjing WANG Guiling ZHANG Shengsheng ZHAO Zhen XING Linxiao GAN Haonan tan xianfeng Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuang 050061China Technical Innovation Center for Geothermal and HDR Exploration and Development Ministry of Natural ResourcesShijiazhuang 050061China Institute of the Hydrogeology and Engineering Geology of Qinghai Shijiazhuang 050061China Qinghai Bureau of Environmental Geology Exploration Xining 810007China Shandong Provincical Lunan Geo-engineering Exploration Institute(The Second Geological Brigade of Shandong Geological Exploration Bureau) JiningShangdong 272100China

Hot dry rock(HDR) is an important geothermal resource and clean energy source that may play an increasingly important role in future energy management. High-temperature HDR resources were recently detected in deep regions of the Gonghe Basin on the northeastern edge of the Tibetan Plateau, which led to a significant breakthrough in HDR resource exploration in China. This research analyzes the deep temperature distribution, radiogenic heat production, heat flow, and crustal thermal structure in the Qiaboqia Valley, Guide Plain, and Zhacanggou area of the Gonghe Basin based on geothermal exploration borehole logging data, rock thermophysical properties, and regional geophysical exploration data. The results are applied to discuss the heat accumulation mechanism of the HDR resources in the Gonghe Basin. The findings suggest that a low-velocity layer in the thickened crust of the Tibetan Plateau provides the most important source of constant intracrustal heat for the formation of HDR resources in the Gonghe Basin, whereas crustal thickening redistributes the concentrated layer of radioactive elements, which compensates for the relatively low heat production of the basal granite and serves as an important supplement to the heat of the HDR resources. The negative effect is that the downward curvature of the lithospheric upper mantle caused by crustal thickening leads to a small mantle heat flow component. As a result, the heat flows in the Qiaboqia Valley and Guide Plain of the Gonghe Basin are 106.2 and 77.6 m W/m2, respectively, in which the crust-mantle heat flow ratio of the former is 3.12:1, indicating a notably anomalous intracrustal thermal structure. In contrast, the crust-mantle heat flow ratio in the Guide Plain is 1.84:1, which reflects a typical hot crust-cold mantle thermal structure. The Guide Plain and Zhacanggou area show the same increasing temperature trend with depth, which reflects that their geothermal backgrounds and deep high-temperature environment

关键词： radiogenic heat production heat flow crustal thermal structure hot dry rock heat source mechanism

An Eco-Friendly High-Effective Scale Inhibitor for High Salt Brine

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Acta Geologica Sinica(English Edition) 2014年第S1期88卷 408-409页

作者： ZHANG Xin SHAO Qianqian CUI Zhaojie tan xianfeng School of Environmental Science and Engineering Shandong University Shandong Provincial Lubei Geo-engineering Exploration Institute

Now the mining of high salt underground brine has been an important aspect of salt lake mining,which is the necessary support to the development of national *** the change of underground geological

关键词： high salt brine poly epoxy succinic acid(PESA) sodium lignin sulfonate scale inhibition rate

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深层地热能开采与储能系统模拟研究

隧道与地下工程灾害防治 2024年第1期6卷 84-93页

作者：王佳铖赵志宏陈进帆贺洁周露明谭现锋清华大学土木工程系北京100084 山东省鲁南地质工程勘察院山东济宁272100

为研究深层地热能常规开采与储能相结合的系统在可持续开采条件下的性能,共定义7个评价指标,其中热突破时间、水位降深和地表沉降用于评价深层地热能的可持续开采,可采地热能、储存能量、能量增益系数和能量回收率用于评价系统的储能运... 详细信息

为研究深层地热能常规开采与储能相结合的系统在可持续开采条件下的性能,共定义7个评价指标,其中热突破时间、水位降深和地表沉降用于评价深层地热能的可持续开采,可采地热能、储存能量、能量增益系数和能量回收率用于评价系统的储能运行效果。利用井-储系统多场耦合数值模拟方法,基于鄄城地热田的两采一灌地热井系统,解释季节性地热开采和储能情况下的深层热储热-水-力多场耦合过程,验证所提出的评价指标的合理性与适用性。结果表明:在常规地热开采的基础上增加夏季地热储能后,冬季可采地热能增加约360%,该系统可满足热突破时间、水位降深和地表沉降这3个可持续开采评价指标的要求。建议在未来的地热开发过程中加入储能,促进更大规模和更高质量地开发利用深层地热能。

关键词：地热储能评价体系可持续开采多场耦合

Study on Corrosion Resistance of Ni-W-P Coating in Hypersaline Brine

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Acta Geologica Sinica(English Edition) 2014年第S1期88卷 369-370页

作者： SHAO Qianqian ZHANG Xin CUI Zhaojie tan xianfeng School of Environmental Science and Engineering Shandong University Shandong Provincial Lubei Geo-engineering Exploration Institute

Brine resource is rich in China,but its exploitation has been a *** brine will corrode equipment and materials seriously during the brine exploitation and *** corrosion problem can cause great

关键词： Ni-W-P coating corrosion resistance hypersaline water.

Global and regional controls on carbon-sulfur isotope cycling during SPICE event in south China

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Frontiers of Earth Science 2023年第3期17卷 713-726页

作者： xianfeng tan Long LUO Hongjin CHEN Jon GLUYAS Zihu ZHANG Chensheng JIN Lidan LEI Jia WANG Qing CHEN Meng LI State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesWuhan 403374China Chongqing Key Laboratory of Complex Oil and Gas Exploration and Development Chongqing University of Science and TechnologyChongqing 401331China Shunan Gas Field PetroChina Southwest Oil and Gas Field CompanyLuzhou 646000China Department of Earth Sciences Durham UniversityDurhamDH13LEUK State Key Laboratory of Oil and Gas Reservior Geology and Exploration Chengdu University of TechnologyChengdu 610059China Yunnan Key Laboratory for Paleobiology Yunnan UniversityKunming 650091China School of Geographical Sciences Southwest UniversityChongqing 400715China

The positive S-isotopic excursion of carbonate-associated sulfate(δ34S_(CAS))is generally in phase with the Steptoean positive carbon isotope excursion(SPICE),which may reflect widespread,global,transient increases in the burial of organic carbon and pyrite sulfate in sediments deposited under large-scale anoxic and sulphidic ***,carbon-sulfur isotope cycling of the global SPICE event,which may be controlled by global and regional events,is still poorly understood,especially in south ***,theδ13CPDB,δ18OPDBδ34S_(CAS),total carbon(TC),total organic carbon(TOC)and total sulfate(TS)of Cambrian carbonate of Waergang section of Hunan Province were analyzed to unravel global and regional controls on carbon-sulfur cycling during SPICE event in south ***δ34S_(CAS)values in the onset and rising limb are not obviously higher than that in the preceding SPICE,meanwhile sulfate(δ34S_(CAS))isotope values increase slightly with increasingδ13CPDB in rising limb and near peak of SPICE(130–160 m).The sulfate(δ34S_(CAS))isotope values gradually decrease from 48.6‰to 18‰in the peak part of SPICE and even increase from 18%to 38.5%in the descending limb of *** abnormal asynchronous C−S isotope excursion during SPICE event in the south China was mainly controlled by the global events including sea level change and marine sulfate reduction,and it was also influenced by regional events such as enhanced siliciclastic provenance input(sulfate),weathering of a carbonate platform and sedimentary *** environment and lithology are not the main reason for global SPICE event but influence theδ13CPDB excursion-amplitude of *** level eustacy and carbonate platform weathering probably made a major contribution to theδ13CPDB excursion during the SPICE,in particularly,near peak of ***,the trilobite extinctions,anoxia,organic-matter burial and siliciclastic provenance input also play an important role in the onset,early and late st

关键词： sulfate isotope excursion terrigenous matter carbonate platform weathering sea level change transitional slope environment Waergang section

Optimal Virtual Battery Model for Aggregating Storage-Like Resources with Network Constraints

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CSEE Journal of Power and Energy Systems 2024年第4期10卷 1843-1847页

作者： Zhenfei tan Ao Yu Haiwang Zhong xianfeng Zhang Qing Xia Chongqing Kang Department of Electrical Engineering and Sichuan Energy Internet Research Institute Tsinghua UniversityBeijing 100084China Science and Technology Institute of China Three Gorges Corporation Hubei 430010China

A virtual battery(VB)provides a succinct interface for aggregating distributed storage-like resources(SLR)to interact with a utility-level *** overcome the drawbacks of existing VB models,including conservatism and neglecting network constraints,this paper optimizes the power and energy parameters of VB to enlarge its flexibility *** optimal VB is identified by a robust optimization problem with decision-dependent *** algorithm based on the Benders decomposition is developed to solve this *** proposed method yields the largest VB satisfying constraints of both network and *** studies verify the superiority of the optimal VB in terms of security guarantee and less conservatism.

关键词： Aggregation decision-dependent uncertainty flexibility robust optimization virtual battery

焊接工艺参数对温度场影响的试验与数值模拟研究

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中国机械工程 2005年第7期16卷 641-644页

作者：谭险峰张华南昌航空工业学院南昌330034 南昌大学南昌330029

针对焊接电流、焊接速度、焊板间隙以及焊枪偏离焊缝中心的偏心值4 个焊接工艺参数进行了TIG焊接试验和数值模拟研究。为减少试验次数,采用了正交设计方案。利用红外测温仪测量和记录了焊件正面上某些点的热循环曲线,然后采用有限元法... 详细信息

针对焊接电流、焊接速度、焊板间隙以及焊枪偏离焊缝中心的偏心值4 个焊接工艺参数进行了TIG焊接试验和数值模拟研究。为减少试验次数,采用了正交设计方案。利用红外测温仪测量和记录了焊件正面上某些点的热循环曲线,然后采用有限元法进行三维焊接温度场的数值模拟,并同试验值进行了比较,二者基本吻合,表明数值计算模型的有效性;以此数值和试验结果为基础,结合正交试验理论,分析了上述4 个工艺参数对温度场(以某点热循环中的峰值温度为代表)的影响顺序,表明偏心值对焊接温度场的影响很大,而这一点是以往的温度场数值仿真研究中所忽视的,需要引起足够的重视。

关键词：焊接工艺参数正交试验焊接热循环数值计算有限元法 TIG焊接

Perspective of alkaline zinc-based flow batteries

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Science China Chemistry 2024年第1期67卷 260-275页

作者： Zhizhang Yuan xianfeng Li Division of Energy Storage Dalian National Laboratory for Clean Energy(DNL)Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 110623China

Energy storage technologies have been identified as the key in constructing new electric power systems and achieving carbon neutrality,as they can absorb and smooth the renewables-generated *** zinc-based flow batteries are well suitable for stationary energy storage applications,since they feature the advantages of high safety,high cell voltage and low ***,many alkaline zinc-based flow batteries have been proposed and developed,e.g.,the alkaline zinc–iron flow battery and alkaline zinc–nickel flow *** development and application are closely related to advanced materials and battery *** this perspective,we will first provide a brief introduction and discussion of alkaline zinc-based flow *** we focus on these batteries from the perspective of their current status,challenges and *** bottlenecks for these batteries are briefly *** with the practical requirements and development trends of alkaline zinc-based flow battery technologies,their future development and research direction will be summarized.

关键词： energy storage alkaline zinc-based flow batteries advanced materials battery structure

Group Decision-Making Method of Entry Policy During a Pandemic

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Tsinghua Science and Technology 2024年第1期29卷 56-65页

作者： Chunsheng Cui Baiqiu Li xianfeng Chen College of Computer and Information Engineering Henan University of Economics and LawZhengzhou 450046China Tourism College Beijing Union UniversityBeijing 100101China

Omicron,the new mutant coronavirus,has spread rapidly globally,attracting close attention from different stakeholders *** complex and constantly changing epidemic situation has had a new impact on the ***,this paper focuses on the characteristics of the rapid spread of the COVID-19 variant ***,epidemic prevention experts conduct preliminary screening as part of the existing epidemic plan database according to the current local situation,after which they sort the alternatives deemed more suitable for the *** the decision-makers identify the most divergent expert group,plan for consultation and adjustments,and finally obtain the plan with the smallest *** article aims to integrate the experts'opinions with the method of minimizing the differences,which can maximize the expert consensus and help organize the schemes that best meet the epidemic *** experts'negotiation and iteration of the differences in the initial plan align with the current complex and dynamic epidemic situation and are of great significance to the rapid formulation of plans to achieve effective prevention and control.

关键词： epidemic prevention and control group decision-making alternative ranking control policy