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Distinct potential aerosol masses under different scenarios of transport at a suburban site of Beijing

Journal of Environmental Sciences 2016年第1期28卷 52-61页

作者： Biwu Chu Yongchun Liu Qingxin Ma Jinzhu Ma Hong He Gang Wang Shuiyuan Cheng Xinming Wang State Key Joint Laboratory of Environmental Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of Sciences Key Laboratory of Beijing on Regional Air Pollution Control Beijing University of Technology State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences

In order to evaluate the secondary aerosol formation potential at a suburban site of Beijing,in situ perturbation experiments in a potential aerosol mass（PAM） reactor were carried out in the winter of *** variations of secondary aerosol formation as a function of time,OH exposure,and the concentrations of gas phase pollutants and particles were reported in this *** periods with distinct secondary aerosol formation potentials,marked as Period Ⅰ and Period Ⅱ,were identified during the *** Period Ⅰ,the secondary aerosol formation potential was high,and correlated well to the air pollutants,i.e.,SO2,NO2,and *** maximal secondary aerosol formation was observed with an aging time equivalent to about 3 days of atmospheric *** period Ⅱ,the secondary aerosol formation potential was low,with no obvious correlation with the air ***,the aerosol mass decreased,instead of showing a peak,with increasing aging *** trajectory analysis during the two periods confirmed that the air mass in Period Ⅰwas mainly from local sources,while it was attributed mostly to long distance transport in Period Ⅱ.The air lost its reactivity during the long transport and the particles became highly aged,resulting in a low secondary aerosol formation *** experimental results indicated that the in situ measurement of the secondary aerosol formation potential could provide important information for evaluating the contributions of local emission and long distance transport to the aerosol pollution.

关键词： Potential aerosol mass Local emission Long distance transport Aging In situ perturbation experiments

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Experimental Study on Blended Coal Combustion of 350MW Supercritical Boiler

Experimental Study on Blended Coal Combustion of 350MW Super...

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2017 International Conference on Material Science,Energy and Environmental Engineering(MSEEE 2017)

作者： Yingai Jin Kaijie Liang Lu Jiao State Key Laboratory of Automotive Simulation and Control Jilin University College of Automotive Engineering Jilin University

ISBN: (纸本)9781510847002

In this paper, Hesi Wulai lignite, Shaltala lignite and Shanxi Gepu bituminous coal were selected to participate in experimental study in a 350 MW supercritical boiler, the design coal of which is *** study investigates the pyrolysis behavior of ten kinds of blended coal using thermogravimetric analysis at a heating rate of 20℃/min to determine mass loss rates and firing temperature as a function of blend *** study also investigates the optimal blending ratio using the multi-objective fuzzy decision-making model with the coal price and sulfur content of blended coal being taken as objective *** was proposed that the optimal blending ratio of the Hesheger Ula lignite, Salta pull lignite and Shanxi Gepu bituminous coal was(4: 4: 3).

关键词： Blending coal Thermogravimetric Analysis Best mix ratio Blending

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Research on capacity configuration method of concentrated reactive power compensator for wind farm LVRT capability

Research on capacity configuration method of concentrated re...

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6th International Conference on Renewable Power Generation

作者： He, Jing Li, Qing Ma, Jing Zhang, Weibo Zhao, Yu State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing China

In order to fulfil the requirement for low-voltage ride-Through (LVRT) capability, the wind farms need to inject the reactive currents during grid fault to support voltage recovery. As the main concentrated reactive power compensator, the static var generators (SVGs) are widely employed in the wind farm for reactive current injection. This study investigates the dynamic reactive currents of the wind turbine based on the field-Test data during the grid faults. Then, the scheme that taking wind turbines as main reactive current sources and SVG as compensator is adopted to realise the wind farm LVRT capability. According to this scheme, the capacity configuration method of SVG is developed, which can be used to design SVG capacity to improve the wind farm dynamic reactive current behaviour. Finally, the simulation results are provided to demonstrate the effectiveness and the availability of the proposed method. © 2017 Institution of Engineering and Technology. All rights reserved.

关键词： Wind farm

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A hybrid DSSE scheme with different kinds of measurements

A hybrid DSSE scheme with different kinds of measurements

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2017 IEEE Conference on Energy Internet and Energy system Integration, EI2 2017

作者： Li, Yuzhi Jin, Fei Wu, Jinyu Liu, Xiaoliang Liu, Qian Ding, Lei Wang, Xiaohui Weifang Power Supply Company State Grid Shandong Electrical Power Company Weifang China Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Shandong University Jinan China

ISBN: (纸本)9781538614273

With the development of EI (Energy Internet), the high quality real-time state information will be more important for energy system. This paper proposes a comprehensive distribution system state estimation scheme. This scheme is promising in combining different kinds of measurements together to give real time state aware information with high resolution and a certain precision. In order to complete the requirement of this scheme, both dynamic state estimation method and WLS (Weighted Least Square) based static state estimation method are involved to deal with different measurements. The weight information is also handled subtly. simulation with IEEE 69-bus system is conducted to show the effectiveness of the proposed scheme. Hopefully by adopting this scheme, the observability can be effectively improved and the period of state estimation can be greatly reduced. © 2017 IEEE.

关键词： Internet of Energy

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Design and implementation of integrated control instrument for micro synchronous generation unit

Design and implementation of integrated control instrument f...

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2017 IEEE Conference on Energy Internet and Energy system Integration, EI2 2017

作者： Li, Hao Zhang, Hengxu Xu, Qun Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Shandong University Jinan250061 China Qingdao Power Supply Company State Grid Shandong Electric Power Company China

ISBN: (纸本)9781538614273

Micro synchronous generation unit is a laboratory scale equipment to model the realistic behavior of a real generator set, control of which determines the operating state of the simulation system directly. This paper presents an integrated control instrument for micro synchronous generator (ICIMSG). ICIMSG integrates signal processing unit and power amplifying unit, realizing control functions such as generator starting and braking, automatic frequency regulation, automatic generator-voltage control (AVR) and automatic quasi-synchronizing paralleling. Light synchronized phasor measurement unit (PMU Light) is employed to monitor the generator set. Real-time operation information including frequency, voltage phasor and current phasor can be sent from PMU Light to ICIMSG through the internet. Appropriate software was developed on server to communicate with ICIMSG in a two-way manner through WiFi network. ICIMSG's real-time control and analysis capabilities provide a platform not only for innovative research ideas, but also for teaching general power system engineering concepts to students via physical experiments. All functions of ICIMSG proposed were tested on physical micro synchronous generator sets. © 2017 IEEE.

关键词： Synchronous generators

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Changes in functional microbial communities in response to long-term nitrate amendment: implications for soil C and N accumulation

Changes in functional microbial communities in response to l...

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第二十次全国环境微生物学学术研讨会

作者： Xingyu Ma Tengxu Wang Zhou Shi Kai Xue Sihang Yang Mengting Yuan Tong Yuan Jizhong Zhou Yunfeng Yang State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment T Institute for Environmental Genomics and Department of Microbiology and Plant Biology University of State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment T

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Confining Free Radicals in Close Vicinity to Contaminants Enables Ultrafast Fenton‐like Processes in the Interspacing of MoS2Membranes

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Angewandte Chemie 2019年第24期131卷

作者： Yu Chen Gong Zhang Huijuan Liu Jiuhui Qu Key Laboratory of Drinking Water Science and Technology Research Centre for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China University of Chinese Academy of Sciences Beijing 100049 China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China

Heterogenous Fenton‐like reactions are frequently proposed for treating persistent pollutants through the generation of reactive radicals. Despite great efforts to optimize catalyst activity, their broad application in practical settings has been restricted by the low efficiency of hydrogen peroxide or persulfate decomposition as well as ultrafast self‐quenching of the activated radicals. Theoretical calculations predicted that two‐dimensional (2D) metallic 1T phase MoS 2 materials with exposed (001) surfaces and (100) edges should have remarkable affinity towards crucial intermediates in the peroxymonosulfate (PMS) activation process. X‐ray photoelectron spectroscopy and in situ Raman spectroscopy were used to show that the exposed metallic Mo sites accelerate the rate‐limiting step of electron transfer. A lamellar membrane made from a stack of 2D MoS 2 with tunable interspacing was then designed as the catalyst. The non‐linear transport between the MoS 2 nanolayers leads to high water diffusivity so that the short‐lived reactive radicals efficiently oxidize contaminants.

关键词： Fenton-artige Reaktionen Membranen MoS2-Nanoschichten Nanoflüssigkeiten Reaktive Sauerstoffspezies

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Engine Speed control During Gear Shifting of AMT HEVs with Identified Intake-to-Power Delay

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IFAC-PapersOnLine 2016年第11期49卷 793-799页

作者： Hong, Jinlong Gao, Bingzhao Lv, Liang Hu, Yunfeng Chen, Hong State Key Laboratory of Automotive Simulation and Control Jilin University China Department of Control Science and Engineering Jilin University China

For hybrid electric vehicles with traction motors installed behind the transmission, motor torque can be used to compensate for traction loss during gear shift. Thus, engine speed control can be used to achieve speed synchronization without disengaging the clutch. To improve the speed tracking performance during gear shift, an engine speed control system is designed based on gain-scheduling PID and PD controllers and Smith predictor. Gain-scheduling PID and PD controllers are used to address the system nonlinearities and Smith predictor is used to compensate the intake-to-power delay. An accurate engine model is built, and the delay time of intake-to-power is identified. By intensive off-line calibration, the control settling time is less than 1 s, and the range of tracking error is 0 to +20 rpm, which satisfy the performance requirements of the synchronizer engagement during gear shift of AMT(Automated Manual Transmission). © 2016

关键词： Electric machine control controllers Electric losses Electric traction Engines Hybrid vehicles Scheduling Speed Speed control Traction motors Vehicle transmissions Automated manual transmission Engine speed control Gain Scheduling Gear shifts Performance requirements Smith predictors Speed synchronizations system nonlinearities

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How Shale Gas will Shape China's Future? an Evaluation Based on Dynamic Energy-CGE Model

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Energy Procedia 2017年 105卷 3349-3354页

作者： Shihui Zhang Can Wang Wenjia Cai State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC) and School of Environment Tsinghua University Beijing 100084 China Ministry of Education Key Laboratory for Earth System Modeling and Center for Earth System Science Room S925 Meng Minwei Science Building Tsinghua University Beijing 100084 China

The potential of shale gas development in China is huge but research that assesses the impacts of shale gas development on China's economy and carbon emissions are rare. This paper used a dynamic CGE model with energy and carbon emission modules to evaluate the impacts under different scenarios. The results implied that large scale of shale gas development will stimulate economy, when the supply of shale gas increases by 500% from 2010 to 2030, the GDP in 2030 will be 2.59% higher than BAU scenario; technology change that reduces the costs of shale gas utilization will not further stimulate economic growth on the basis of large scale exploitation, but will improve the diffusion of gas and make the energy structure cleaner therefore contribute the carbon mitigation. Hence, it is important for policy makers to take into account the varied effects of different shale gas promotion approaches.

关键词： Shale Gas low carbon development economy dynamic CGE model

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From production to consumption: A multi-city comparative study of cross-regional carbon emissions

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Energy Procedia 2018年 152卷 744-749页

作者： Fanxin Meng Gengyuan Liu Yuanchao Hu Meirong Su Zhifeng Yang School of Environment and Energy South China University of Technology Guangzhou Guangdong 510006 China Research Center for Eco-environmental Engineering Dongguan University of Technology Dongguan 523808 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China Key Laboratory of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China University of Chinese Academy of Sciences No.19(A) Yuquan Road Beijing 100049 China

With the increasing threat of global climate change nowadays, carbon emissions reductions in cities have aroused the concern of the world. Carbon emission is one of profiles that are closely connected to the urban metabolic system. Here, a global environmentally extended multi scale input-output model (EE-MSIO) was employed to track accurately the carbon emissions in the multi scale economic system from production and consumption perspectives. The four municipalities in China for Beijing, Tianjin, Shanghai and Chongqing were selected as the case. The findings reveal that final demands in the four Chinese municipalities not only trigger a large amount of carbon emissions within their own jurisdictional boundaries, but also impose emissions to other regions via domestic and international trade. The results evidenced that close to 50% in Chongqing and more than 70% of consumption-based carbon emissions in Beijing, Shanghai and Tianjin occurred outside the urban geographic boundary. Moreover, North China is the largest carbon producer for Beijing and Tianjin, Central China for Shanghai and Southwestern for Chongqing, while RoW and BRIIAT are the top two international carbon inflow sources for all four municipalities.

关键词： Multi-regional input-output (MRIO) model embodied carbon consumption-based accounting cross-regional multi-city

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