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Air pollutant control and strategy in coal-fired power industry for promotion of China’s emission reduction

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Frontiers in Energy 2019年第2期13卷 307-316页

作者： Weiliang WANG Bo LI Xuan YAO Junfu LYU Weidou NI Key Laboratory for Thermal Science and power engineering of the Ministry of Education Department of Energy and Power EngineeringTsinghua University Beijing 100084 China electric power Planning and engineering institute Beijing 100120China Beijing Guodian Longyuan Environmental engineering Co. Ltd. Beijing 100084China

Coal-fired power industry has always been the major power source in China. As coal-fired power industry consumes around a half of China’s coal production, it is always thought to be a big air pollutant emission source. As more and more strict legislations in coal-fired power industry have been issued by the government, the emission performance in coal-fired power industry has been drastically reduced *** on a brief review of the development of emission control in China’s coal-fired power industry, the affecting mechanism among the development of installed capacities of emission control device, pollutant emission, and emission performances in coal-fired power industry is studied. According to a systematic study on the development of emissions of classified categories, the role of coal-fired power industry as a pollutant source is *** is found that, coal- fired power industry has contributed the most to China5S emission reduction, and the barycenter of air pollutant emission has been transformed to other high energy consumption industries,like heat, iron/steel, and *** some development strategies are suggested, such as maintaining the current emission standard in coal-fired power industry;expending the coal-fired power emission standards to categories of heat generation and supply, nonmetallic mineral production and ferrous metals smelt-ing and processing;and controlling other heavy metal by consulting the method of Hg control.

关键词： coal-fired power industry energy intensive industries pollutant emission control NOx SO2 soot

Experimental study on mesostructural damage evolution of sandstone subjected to freeze-thaw cycling under uniaxial compression

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Research in Cold and Arid Regions 2022年第5期14卷 317-328页

作者： Hui Liu SenLei Han GengShe Yang Yuan Zhang JinJie Yu ZongXin Feng School of Architecture and Civil engineering Xi'an Undsiversity of Science and TechnologyXi'anShaanxi 710054China Northwest electric power Design institute CO. LTD.of China Power Engineering Consulting GroupXi'anShaanxi 710075China

In perennially frozen or seasonally frozen soil regions,freeze-thaw cycling adversely impacts the mechanical properties of rock mass,resulting in landslides,rock erosion,and other geological *** microscopic damage evolution law of loaded sandstone under the freeze-thaw cycle is analyzed by conducting Nuclear Magnetic Resonance(NMR)and uniaxial compression acoustic emission(AE)*** experimental results have shown that:(1)Freeze-thaw cycling increases sandstone's internal pores,enlarges the pore size,and modifies the original pore distribution.(2)The damage due to freeze-thaw cycling is positively correlated with the initial damage to the rock,and the damage on the rock surface is more severe than inside the rock sample.(3)Freeze-thaw cycling negatively impacts the mechanical properties of sandstone,and the elastic deformation stage of sandstone gradually decreases as the number of freeze-thaw cycles increases and gradually transitions from brittle failure to ductile failure.(4)The characteristic parameters of AE ringing count and accumulated energy can reveal the severity of freeze-thaw damage and the dynamic evolution process,and the damage development rate exhibits abrupt changes at critical *** five freeze-thaw cycles,the damage development rate rises suddenly,as manifested by a sharp increase in the frequency and energy of AE ***-energy AE events frequently occur during the rapid expansion period of damage,which can be adopted as an essential reference for damage propagation and aggravation.

关键词： Freeze-thaw cycling Nuclear magnetic resonance Uniaxial compression Acoustic emission Sandstone damage

Condensate Polishing System for PWR Nuclear power Plant

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Journal of Energy and power engineering 2011年第10期5卷 999-1004页

作者： A.L. Wang C.Y. Zhang Y.Q. Yang L.L. Yin shandong electric power engineering consulting institute Co. ltd. Jinan Shandong 250013 China Jinan power electrical Facility Co. ltd. Jinan Shandong 250013 China State Nuclear electric power Planning Design ＆ Research institute Beijing 100094 China

In this paper, operation characteristic of condensate polishing system is studied during startup, based on generator blowdown limit, given limit ion concentration in condensate during condenser leakage. Further give conclusion about condensate polishing system configuration and operation requirement： full flow condensate polishing system （CPS） is necessary to the units cooled by sea water, and it is better that one or two series put in service during normal operation other than all of them in hot standby. While continuous condensate tube leakage is 256 L/h, the units cooled by fresh water will be shutdown immediately, for this level leakage, whichever condensate polishing system capacity is 50% （30%） or 100%, action level 2 will be preformed, so 50% （30%） is enough for fresh water cooled units.

关键词： Condensate polishing system water quality operation.

InSAR measurements of surface deformation over permafrost on Fenghuoshan Mountains section,Qinghai-Tibet Plateau

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Journal of Systems engineering and Electronics 2021年第6期32卷 1284-1303页

作者： YANG Honglei JIANG Qiao HAN Jianfeng KANG Ki-Yeob PENG Junhuan School of Land Science and Technology China University of Geosciences(Beijing)Beijing 100083China Central Southern China electric power Design institute Co. LtdChina Power Engineering Consulting Group CorporationWuhan 430071China Australasian Joint Research Centre for Building Information Modelling School of Built EnvironmentCurtin UniversityPerth WA 6845Australia

The permafrost development in the Qinghai-Tibet engineering Corridor(QTEC)is affected by natural environment changes and human engineering *** engineering activities may damage the permafrost growing environment,which in turn impact these engineering *** high spatial-temporal resolution monitoring over the QTEC in the permafrost region is very *** paper presents a method for monitoring the frozen soil area using the intermittent coherencebased small baseline subset(ICSBAS).The method can improve the point density of the results and enhance the interpretability of deformation results by identifying the discontinuous coherent points according to the coherent value of time *** the periodic function that models the seasonal variation of permafrost,we separate the long wavelength atmospheric delay and establish an estimation model for the frozen soil *** this can raise the monitoring accuracy and improve the understanding of the surface deformation of the frozen *** this study,we process 21 PALSAR data acquired by the Alos satellite with the proposed ICSBAS *** results show that the frozen soil far from the QTR in the study area experiences frost heave and thaw settlement(4.7 cm to8.4 cm)alternatively,while the maximum settlement along the QTR reaches 12 *** interferomatric syntnetic aperture radar(InSAR)-derived results are validated using the ground leveling data nearby the Beiluhe *** validation results show the InSAR results have good consistency with the leveling data in displacement rates as well as time *** also find that the deformation in the permafrost area is correlated with temperature,human activities and *** on the interfering degree of human engineering activities on the permafrost environment,we divide the QTEC along the Qinghai-Tibet Railway into engineering damage zone,transition zone and natural permafrost.

关键词： permafrost Qinghai-Tibet Plateau small baseline subset interferomatric syntnetic aperture radar(SBAS-In SAR) deformation model

A novel approach for the optimal arrangement of tube bundles in a 1000-MW condenser

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Journal of Zhejiang University-Science A(Applied Physics & engineering) 2023年第12期24卷 1140-1146页

作者： Jinju GUO Taoye YIN Shuai WANG Wei CHEN Peiwang ZHU Kun LUO Yun KUANG Jie LIU Junjun HUANG Bing HUO Hui WANG Chunlin ZHANG Jian WANG State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China Shanghai institute for Advanced Study of Zhejiang University Shanghai 200120China Central Southern China electric power Design institute Co. Ltd.of China Power Engineering Consulting GroupWuhan 430071China Huanggang Dabieshan power Generation Co. LtdHuanggang 438300China China Energy Digital Technology Group Co. LtdBejing 100022China

1Introduction The condenser plays a vital role in the operation of a thermal power generation *** primary function is to remove the heat from the steam that is exhausted from the steam turbine,thereby condensing the steam into ***,it establishes and maintains a specific degree of vacuum at the exhaust port of the steam turbine,facilitating efficient operation of the turbine(Keshvarparast et al.,2020).The vacuum degree of the condenser is affected by physical factors such as steam-side resistance and heat-transfer efficiency.

关键词： vacuum arrangement optimal

Reference satellite selection method for GNSS high-precision relative positioning

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Geodesy and Geodynamics 2017年第2期8卷 125-129页

作者： Xiao Gao Wujiao Dai Zhiyong Song Changsheng Cai School of Geosciences and Info-Physics Central South University Changsha 410083 China Northwest electric power Design institute Co. Ltd. of China Power Engineering Consulting Group Xi'an 710032 China

Selecting the optimal reference satellite is an important component of high-precision relat/ve positioning because the reference satellite directly influences the strength of the normal equation. The reference satellite selection methods based on elevation and positional dilution of precision （PDOP） value were compared. Results show that all the above methods cannot select the optimal reference satellite. We introduce condition number of the design matrix in the reference satellite selection method to improve structure of the normal equation, because condition number can indicate the ill condition of the normal equation. The experimental results show that the new method can improve positioning accuracy and reliability in precise relative positioning.

关键词： Global Navigation Satellite System (GNSS)Relative positioning Reference satellite Positional dilution of precision (PDOP)Condition number

The Comparative Study of Single Pile Bearing Characteristics in Calcareous Sands Foundation and Quartz Sands Foundation Based on Model Experiment

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The Comparative Study of Single Pile Bearing Characteristics...

Parallelization of spherical discontinuous deformation analysis(SDDA) for geotechnical problems based on cloud computing environment

作者： Chao Yang Hao Jiang School of Civil engineering and Architecture Wuyi University shandong electric power engineering consulting institute Co Ltd.

The bearing characteristics of single steel pipe pile in calcareous sands foundation and quartz sands foundation with different relative compactness are compared and analyzed by the model tests of single steel pipe pile in two kinds of soil media in *** test results show that the bearing behavior of single steel pipe pile is quite different between calcareous sands and quartz *** end forms of single steel pipe pile have little influence on the bearing capacity,especially in the sands foundation with high relative *** the relative compactness of foundation soil has obvious effect on improving the bearing capacity of single steel pipe *** the bearing capacity of single steel pipe pile in calcareous sands is much lower than that in quartz sands in the same relative *** lateral friction resistance of single steel pipe pile in quartz sands is much larger than that of calcareous *** lateral friction resistance of single steel pipe pile in calcareous sands does not increase significantly with the increase of relative compactness;But the lateral friction resistance of single steel pipe pile in quartz sands increases significantly with the increase of relative *** calcareous sands foundation,the ratio of load sharing on the side of single steel pipe pile is small,and the load on the pile top is mainly borne by the soil at the pile end,and it is manifested as friction end bearing *** the quartz sands foundation,the axial force of the pile decreases rapidly along the *** the faster the axial force of the single pile of the steel pipe is decayed with the smaller compactness of the quartz sands..

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Science China(Technological Sciences) 2021年第9期64卷 1971-1980页

作者： JIAO Yu-Yong WU ZeYang ZHENG Fei ZHAO Qiang WANG Long HUANG Gang-Hai TAN Fei Faculty of engineering China University of GeosciencesWuhan 430074China Shanghai Construction No.4(Group)Co. Ltd.Shanghai 201103China Economic and Technology Research institute State Grid Shandong Electric Power CompanyJinan 250013China School of Civil engineering Central South UniversityChangsha 410083China

The computational efficiency of the traditional serial spherical discontinuous deformation analysis(SDDA) program has limited its application in geotechnical engineering problems that need a large number of spheres. The cloud computing technology is used to parallel the SDDA program for the first time in this research. The most computationally intensive portions of the SDDA program, i.e., contact detection and matrix solution, are parallelized with proposed algorithms. The accuracy of the cloud-based parallel SDDA program(CB-PSDDA) is verified first. Further efficiency tests show that significant speedup can be obtained with an 8-server configuration and the computing scale can be up to several tens of thousands of particles. The cloud-based parallelized SDDA program increases its potential in applications of deformation and failure analysis of large-scale and realistic geotechnical engineering problems.

关键词： spherical discontinuous deformation analysis(SDDA) distributed computing cloud computing

Pollution sources of atmospheric fine particles and secondary aerosol characteristics in Beijing

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Journal of Environmental Sciences 2020年第9期32卷 91-98页

作者： Xi Zhang Kai Zhang Huiping Liu Wenli Lv Masahide Aikawa Bing Liu Jinhe Wang State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China School of Municipal and Environmental engineering Co-Innovation Center for Green Building of Shandong ProvinceShandong Jianzhu UniversityJinan 250101China Faculty of Environmental engineering The University of Kitakyushu1-1HibikinoWakamatsuKitakyushuFukuoka 808-0135Japan Qingdao Hongrui electric power engineering consulting Co. LtdQingdao 266100China Resources and Environment Innovation Research institute School of Municipal and Environmental EngineeringShandong Jianzhu UniversityJinan 250101China Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP3) Department of Environmental Science and EngineeringFudan UniversityShanghai 200438China

To investigate the secondary formation and pollution sources of atmospheric particles in urban Beijing,PM2.5 and its chemical components were collected and determined by URG-9000 D ambient ion monitor(AIM) from March 2016 to January *** water-soluble ions(WSIs), NO3-,SO42- and NH4+(SNA) had the largest proportion(77.8%) with the total concentration of 23.8 μg/***,as fine particle pollution worsened,the NO3-,SO42- and NH4+ concentrations increased basically,which revealed that secondary aerosols were the main cause of particle pollution in ***,the particle neutralization ratio(1.1),the ammonia to sulfate molar ratio(3.4) and the nitrate to sulfate molar ratio(2.2) showed that secondary aerosols are under ammonium-rich conditions with the main chemical forms of NH4 NO3 and(NH4)2 SO4,and vehicle emission could be the main anthropogenic source of secondary aerosols in *** analysis further indicated that secondary aerosols,solid fuel combustion,dust and marine aerosol were the principal pollution sources of PM2.5,accounting for about 46.1%,22.4% and 13.0%,respectively,and Inner Mongolia and Hebei Provinces could be considered as the main potential sources of PM2.5 in urban *** addition,secondary formation process was closely related with gaseous precursor emission amounts(SO2,NO2,NH3 and HONG),atmospheric ozone concentration(O3),meteorological conditions(temperature and relative humidity) and particle *** analysis of the thermodynamic equilibrium model(ISORROPIA Ⅱ)revealed that controlling total nitrate(TN) is the effective measure to mitigate fine particle pollution in Beijing.

关键词： pollution aerosol sources