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Environmental consequences of an ultra-low emission retrofit in coal-fired power plants from a life cycle perspective

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Waste disposal and Sustainable Energy 2021年第4期3卷 309-323页

作者： Jun dong Yuanjun Tang Aizhong ruan Jie Chen Xiaoqing Lin Shengyong Lu Xiang Gao State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China Zhejiang Energy R&D Institute Co. Ltd.Hangzhou 311121China Key Laboratory of Energy Conservation and Pollutant Control Technology for Thermal Power of Zhejiang Province Hangzhou 311121China Department of Energy and Environment System Engineering Zhejiang University of Science and TechnologyHangzhou 310023China Zhejiang Shengyuan Environmental Testing Technology Co. Ltd.Shaoxing 311899China

To make coal-fired power generation more environmentally friendly,China has initiated a series of ultra-low emission ret-rofits to the air pollution control(APC)system of the existing power *** this study,a life cycle assessment(LCA)is conducted to analyze the environmental net benefits for the typical ultra-low emission retrofit of a 1000 MW power *** key processes,substances,and APC devices are verified and *** results confirm that the retrofit effectively decreases the environmental stress of acidification potential(AP),eutrophication potential(EP),and photochemical ozone creation potential(POCP)by 69%-79%,which can be attributed to significantly reduced emissions at the ***,the retrofit has also increased other impact categories by 24%-79%,primarily due to the consumption of additional elec-tricity and *** retrofit of selective catalytic reduction,electrostatic precipitator(ESP),and wet limestone flue gas desulfurization devices has a dominant effect on the impacts of EP,human toxicity potential(HTP),and AP.A newly installed wet ESP shows some environmental benefits(only for AP),but causes considerable burdens,in particular for the investigated impact categories global warming potential(GWP),marine aquatic ecotoxicity(MAETP),and abiotic depletion fossil(AdP fossil).The obtained results indicate that the hidden environmental consequences,which are associated with the production of energy and materials,need to be examined more comprehensively to inform the development of ultra-low emission technologies and strategies effectively.

关键词： Ultra-low emission retrofit Life cycle assessment Air pollution control system coal-fired power plants Environmental impacts

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Multiple dynamic evaluation and information management of research talents

Multiple dynamic evaluation and information management of re...

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Education, Knowledge and Information Management (ICEKIM), International conference on

作者： dongsheng Li Yaping ren Drilling Equipment and Technology R&D Center Xi 'an Research Institute Co. LTD. China Coal Technology & Engineering Group Xi'an China Technology Development Department Xi'an Research Institute Co. LTD. China Coal Technology & Engineering Group Xi'an China

ISBN: (纸本)9781665416672

In order to solve the problem of talent evaluation and information management in manufacturing enterprises, a diversified dynamic evaluation information management system for manufacturing research talents and teams is constructed. Through the clustering algorithm of scientific research results built into the IPd talent information management system, the scientific research talents in the product development process are classified into five categories: basic research, applied research, technology development, results transformation and science and technology management services. The system scores the diversity indicators of research individuals with hierarchical analysis, and the four dimensions of finance, customers, internal operation, and learning and growth with the balanced scorecard method. The system has the function of classifying the information of scientific research achievements of enterprise talents; the function of storing, managing and classifying the information of scientific research talents; and the function of retrieving the information of scientific research achievements and talents for the decision-making level. The research on the multiple dynamic evaluation and information management system of scientific research talents is useful for improving the evaluation mechanism of r&d talents and teams, scientific research achievements and talent information management in manufacturing enterprises.

关键词： Symbiosis technology management Heuristic algorithms Education Finance Product development Manufacturing

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dual-Polarized Microstrip Antenna with Cross Grid Structure radiating Towards the Edge of the Substrate in the d-Band

Dual-Polarized Microstrip Antenna with Cross Grid Structure ...

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European conference on Antennas and Propagation, EuCAP

作者： ryosuke Hasaba Ken Takahashi Tomoki Abe Tomohiro Murata Yoichi Nakagawa Koji Takinami Hiroshi Taneda Takashi Tomura Issei Watanabe Engineering Division Panasonic Industry Co. Ltd. Yokohama Japan Development Center Panasonic System Networks R&D Lab. Co Kanazawa Japan Research & Development Div. Shinko Electric Industries Co. Ltd. Nagano Japan Department of Electrical and Electronic Engineering Institute of Science Tokyo Tokyo Japan Advanced ICT Research Institute National Institute of Information and Communications Technology Tokyo Japan

ISBN: (数字)9788831299107

ISBN: (纸本)9798350366327

This paper proposes a dual-polarized antenna for d-band applications, which radiates in the substrate end direction. The antenna's radiating elements and ground are formed using vias, via lands, and copper foil. The radiating element features a cross-grid design, which combines both cross and grid shapes. This allows for the adjustment of the resonant frequency for each polarization, even under manufacturing rule constraints. The characteristics and operation of a singleelement antenna were demonstrated through simulations. Subsequently, the gain of an 8-element array was compared between measured and calculated values, demonstrating the effectiveness of the proposed antenna.

关键词： Antenna measurements Shape resonant frequency Microstrip antennas directive antennas Gain measurement Manufacturing Microstrip Substrates Antenna arrays

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Electrochemical polymerization of PEdOT:PSS with graphene oxide and silver nanoparticles for antibacterial coating and SErS detection

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Surface and coatings technology 2024年 485卷

作者： Wang, Kuan-Syun Lan, Hsiang-Ting Wu, Chun-Hao Chen, Yun-Chu Lin, Ying-Jun Sung, Ting-Jia Chen, Jeng-Shiung Cheng, Yu-Wei Chung, ren-Jei Liu, Ting-Yu Department of Materials Engineering Ming Chi University of Technology New Taipei City243303 Taiwan Yottadeft Optoelectronics Technology Co. Ltd. Taipei10460 Taiwan Department of Chemical Engineering Ming Chi University of Technology New Taipei City243303 Taiwan R&D Center of Biochemical Engineering Technology Ming Chi University of Technology New Taipei City243303 Taiwan Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei10608 Taiwan College of Engineering & Center for Sustainability and Energy Technologies Chang Gung University Taoyuan33302 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan City Taiwan

This study involved the use of electrochemical polymerization to coat poly(3,4-ethylenedioxythiophene) (PEdOT), polystyrene sulfonate (PSS) and graphene oxide (GO) onto SUS316L stainless steel substrates, aiming to produce PEdOT:PSS and GO@PEdOT:PSS films. Following this, Ag@PEdOT:PSS and GO/Ag@PEdOT:PSS films were developed through the electrochemical deposition of silver nitrate. Electrochemical impedance spectroscopy (EIS) indicated that adding GO increased the impedance of film, while AgNPs deposition decreased it, thereby enhancing conductivity. Films with AgNPs showed surface enhanced raman scattering (SErS) effects, as assessed using malachite green (MG). compared to films without GO, the GO/Ag@PEdOT:PSS films exhibit enhanced conductivity and SErS detection performance due to the negatively charged functional groups on the GO surface forming a continuous layer of AgNPs. Moreover, antibacterial capabilities were evaluated through bacterial attachment and inhibition zone assays. Both Ag@PEdOT:PSS and GO/Ag@PEdOT:PSS films were effective in inhibiting bacterial adhesion, achieving up to 99.4 % and 99.0 % inhibition, respectively. In the inhibition zone assays, the GO/Ag@PEdOT:PSS film showed a 1.33 times increase in antibacterial efficacy compared to Ag@PEdOT:PSS. Furthermore, the effectiveness of electrodepositing antibiotics on these substrates was investigated, confirming optimal antibacterial performance. This efficacy is attributed to the synergistic interaction between silver nanoparticles and antibiotics, potentially reducing the need for antibiotics. The findings of this study highlight its significant potential for applications in antibacterial treatments and biomedical detection. © 2024 Elsevier B.V.

关键词： Antibiotics

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A Proportional-Phase Lag compensation Strategy Enhancing robustness Against Grid Impedance for LCL-Type Grid-connected Inverter

A Proportional-Phase Lag Compensation Strategy Enhancing Rob...

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Power Electronics and Power System conference (PEPSC)

作者： Jinping Huang damin Zhang Xianjin Su Yichuan Zhong Weidong Xu Zexiang ding School of Electrical Engineering and Automation Xiamen University of Technology Xiamen China Kehua data R&D Center Kehua Data Co. Ltd Xiamen China School of Mechanical and Electrical Engineering and Automation Xiamen University Tan Kah Kee College Xiamen China

compared to analog control, the adoption of digital control in LCL-type grid-connected inverters introduces control delays, which significantly alters the frequency characteristics of open-loop transfer functions of systems and imposes stricter stability requirements on the grid-connected inverter. Furthermore, in weak grid with wide-ranging variations in grid impedance, the robustness of the system is severely compromised. To bolster the resilience of the grid-connected inverter amidst fluctuations in grid impedance, this paper proposes a proportional-phase lag compensation strategy. By considering the control delays, stability analysis of the system is conducted within the bounds of grid impedance fluctuations, and stable regions are identified based on the Nyquist stability criterion, and then phase lag compensators and proportional parameters are properly designed. The resulting improved system adheres to the Nyquist stability criterion in weak grid, ensuring the grid-connected inverter to maintain stable operation, even amidst variations in grid impedance. Ultimately, the simulation outcomes confirm the viability and efficacy of the method proposed.

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Advancements in Suppressing Load disturbances of Electric Motor drives: An Overview

Advancements in Suppressing Load Disturbances of Electric Mo...

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IEEE Student conference on Electric Machines and Systems

作者： Chunqiang Liu Ziteng Li Jiahui Li Yaofei Han Ming Sun Chao Gong Hangzhou Institute of Technology Xidian University Xi’an China Zhuji Hechuang Motor Technology Co. Ltd Zhuji China National Maglev Transportation Engineering R&D Center Tongji University Shanghai China School of Automation Northwestern Polytechnical University Xi’an China

This paper provides a comprehensive overview of load disturbances in electric motor systems, their impact on performance, and existing control methods. First, load disturbances that can affect motor stability, control accuracy, dynamics, and energy efficiency, including static, dynamic, and nonlinear load variations, are introduced. Second, traditional control methods used for suppressing load disturbances like feedback and feedforward control are discussed, along with their advantages and limitations. Third, advanced control strategies such as intelligent control, self-adaptive control, and robust nonlinear control are introduced. Finally, this paper highlights the need for further research and identifies future directions. Overall, this review paper contributes to the development of robust motor control strategies, enhancing industrial automation and manufacturing processes.

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A comparative study on accurate prediction of cavitation characteristics for head drop in a mixed-flow pump with steady- And unsteady-state analysis

A comparative study on accurate prediction of cavitation cha...

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作者： Kim, Yong-In Kim, Sung Yang, Hyeon-Mo Lee, Kyoung-Yong Lee, Yong-Kab Choi, Young-Seok Green Process and Energy System Engineering University of Science and Technology Daejeon Korea Republic of Thermal and Fluid System R&D Group Korea Institute of Industrial Technology Cheonan Korea Republic of Anflux Co. Ltd. Seoul Korea Republic of

The cavitation characteristics for the head drop in a mixed-flow pump were investigated with the steady- and unsteady-state analysis. Two mixed-flow pump models exhibiting a different incidence angle were analyzed under the cavitation condition. The model with a larger incidence angle obtains relatively poor suction performance. Moreover, the steady-and unsteady-state analysis indicate different head level under the cavitation condition. The results of the unsteady-state analysis are more accurate to the experimental results. The head of a fully convergent steady-state analysis is not even distributed in the head fluctuation range of the unsteady-state analysis. However, the head drop due to the decrease of inlet pressure has almost the same distribution and gradient. In addition, the amount and shape of the bubbles were presented with the time variation, which were also compared with the averaged result of steady-state analysis. The bubbles show a larger oscillation in the model which has a larger incidence angle. The oscillation of the bubbles is related to the magnitude of the head fluctuation. © Published under licence by IOP Publishing ltd.

关键词： Cavitation

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dynamic modelling of 2-dOF luffing mechanism with serial closed kinematic chains

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Journal of Central South University 2021年第1期28卷 168-178页

作者： ZHU Zhen-xin ZHU Jian-xin KANG Hui-mei QIAN Huan-yun State Key Laboratory of High Performance Complex Manufacturing Central South UniversityChangsha 410083China College of Engineering and Design Hunan Normal UniversityChangsha 410081China The National Enterprise R&D Center Sunward Intelligent Equipment Co.Ltd.Changsha 410100China

Luffing mechanism is a key component of the construction *** paper proposes a two degree of freedom(2-dOF)luffing mechanism,which has one more pair of driving cylinders than the single dOF luffing mechanism,to improve the performance of the *** establish the dynamic model of the 2-dOF luffing mechanism,firstly,we develop a hierarchical method to deduce the Jacobian matrix and Hessian matrix for obtaining the kinematics ***,we divide the luffing mechanism into six bodies considering actuators,and deduce the kinetic equations of each body by the Newton-Euler *** on the dynamic model,we simulate the luffing ***,a prototype is built on a pile driver to validate the *** and experiments show that the dynamic model can reflect the dynamic properties of the proposed luffing *** the control strategy that the front cylinders retract first shows better mechanical behavior than the other two control *** research provides a reference for the design and application of 2-dOF luffing mechanism on construction *** modeling approach can also be applied to similar mechanism with serial closed kinematic chains,which allows to calculate the dynamic parameters easily and exactly.

关键词： luffing mechanism dynamic model hierarchical method control strategy prototype

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Quasi-Periodic replacement Policy for a Two-Unit Production System

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Journal of Shanghai Jiaotong university(Science) 2020年第3期25卷 398-406页

作者： GAO Wenke WANG Yu YANG Tianshu JI Hong CHEN Yin College of Energy and Power Engineering Lanzhou University of TechnologyLanzhou 730050China Technical Center R&D DepartmentYEAL Electric Co.Ltd.Changchun 130113China

Maintenance optimization of periodic replacement for mono-unit production system is a widely discussed *** practice,the replacement for a parallel production system with multi-unit served by one repairman is *** replacement action is often implemented in a maintenance window at random,although the replacement period appears as a quasi-periodic *** optimize these maintenance policies,this study analyzes a bivariate quasi-periodic replacement policy (T,W) for a two-unit parallel production system with a maintenance window and one *** unit of the system is replaced when either a failure occurs or a replacement plan comes in the maintenance window,whichever comes *** one of the two units is in the replacement,the other may continue operating or waiting until the replacement is *** optimal replacement window [T*,T* + W*] can be obtained by jointly considering the system's long-running cost rate and the availability using the genetic *** study also introduces three examples of the production system with different types of units to illustrate the proposed policy.

关键词： quasi-periodic replacement policy maintenance window two-unit production system one repairman

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Metabolomics mechanism of traditional soy sauce associated with fermentation time

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Food Science and Human Wellness 2022年第2期11卷 297-304页

作者： Li Zhu Siyu He Ying Lu Jianhong Gan Ningping Tao Xichang Wang Zaoli Jiang Yuanxiang Hong Changhua Xu College of Food Science and Technology Shanghai Ocean UniversityShanghai 201306China Shanghai Engineering Research Center of Aquatic-Product Processing&Preservation Shanghai 201306China Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation(Shanghai) Ministry of AgricultureShanghai 201306China Department of Pharmacology Yale UniversityNew HavenCT06520US Xiamen Gulong Food Co. Ltd.Xiamen 361000China National R&D Branch Center for Freshwater Aquatic Products Processing Technology(Shanghai) Shanghai 201306China

Given that fermentation time has significant impact on quality and flavor of soy sauce,a global understanding of the metabolic mechanism as fermentation time prolonged is essential for producing satisfactory and consistent quality of traditional soy ***,the metabolic compounds changes of soy sauce associated with fermentation time up to 10 years were comprehensively investigated by using Chinese traditional fermented soy sauce(CTFSS)as a *** showed that formaldehyde nitrogen,total soluble nitrogen(TSN),non-salt soluble solids,amino acids,free 5’-nucleotides and volatile compounds in CTFSS changed obviously during ***,glutamic acid and aspartic acid were prominent in *** decrease in content of hypoxanthine(Hx)was found from 1 M(1-month soy sauce)to7 M(7-months soy sauce).Furthermore,a significant opposite tendency for changes between some volatile compounds and amino acids was indicated that there was a transformation between these two ***,a better understanding to the influence of fermentation time on soy sauce had been *** the formation and conversion of amino acids and sugars might be mainly responsible for flavor formation in CTFSS,the ratio of these two reactions rate led the metabolism to be divided into three steps,degradation,conversion and balance.

关键词： Soy sauce Fermentation Amino acids Volatile compounds Flavor Metabolomics

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