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Discussion on application of FLIC-Fluent coupled simulation technology on medium-scale and large-scale municipal solid waste incinerators 6

Discussion on application of FLIC-Fluent coupled simulation ...

引用

6th International Conference on Intelligent Computing, Communication, and Devices, ICCD 2023

作者： Zhang, Hongze Guangxi Key Laboratory of Machine Vision and Intelligent Control Guangxi Wuzhou China Guangxi Colleges and Universities Key Lab. of Image Processing and Intelligent Information System Guangxi Wuzhou China School of Electronics and Information Engineering Wuzhou University Guangxi Wuzhou China

ISBN: (数字)9781510666269

ISBN: (纸本)9781510666252

Today, the world economy is in the stage of rapid development, followed by the rising quantity, the decreasing moisture content, and the increasing heat value of Municipal Solid Waste (MSW). Since waste incineration has the advantages of excellent volume reduction effect, high resource utilization efficiency, and less secondary pollution to the environment, waste incineration disposal technology has received extensive attention worldwide. With the continuous increase of the urban population, the amount of sewage sludge is growing year by year. The process of the sludge incineration system is highly complicated, and the cost of construction and operation is high. The waste incinerator can process not only MSW but also sewage sludge. Therefore, the co-incineration of sewage sludge with MSW in the existing waste incinerator is a safe and effective way to dispose of sewage sludge. In this paper, the simulation results of Computational Fluid Dynamics (CFD) are analyzed for medium-scale and large-scale waste incinerators, characterized by high moisture content, high ash content, low heat value of sewage sludge, and incomplete combustion and high pollutant emissions in waste incinerators. With FLIC-Fluent coupled simulation method, the critical information such as temperature field, velocity field, concentration field of principal components, and the pollutant emissions can be predicted. Based on the CFD simulation results, the performance and structure of waste incinerators can be optimized, and the new products can be designed and developed. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Waste incineration

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Multi-objective optimal control algorithm for HVAC based on particle swarm optimization

Multi-objective optimal control algorithm for HVAC based on ...

引用

International Conference on Intelligent control and Information Processing (ICICIP)

作者： Yanyu Zhang Peng Zeng Chuanzhi Zang School of Computer and Information Engineering Henan University Kaifeng China University of Chinese Academy of Sciences Beijing China Key Lab. of Networked Control System Chinese Academy of Sciences Shenyang China

ISBN: (纸本)9781479936519

Residential sector is the biggest potential field of reducing peak demand through demand response (DR) in smart grid. Heating, ventilating, and air conditioning (HVAC) is the largest residential electricity user in house. Therefore, controlling the operation of HVAC is an effective method to implement DR in residential sector. The algorithms proposed in literature are single objective optimization algorithms that only minimize the electricity cost and could not quantify the user's comfort level. To tackle this problem, this paper proposes a comfort level indicator, builds a multi-objective scheduling model, and presents a multi-objective optimal control algorithm for HVAC based on particle swarm optimization (PSO). The algorithm controls the operation of HVAC according to electricity price, outdoor temperature forecast, and user preferences to minimize the electricity cost and maximize the user comfort level simultaneously. The proposed algorithm is verified by simulations, and the results demonstrate that it can decrease the electricity cost significantly and maintain the user comfort level effectively.

关键词： Electricity Vectors Smart grids Pareto optimization Optimal control Temperature control

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A control Strategy for T-Type Three-Level Converter to Suppress Midpoint Voltage Fluctuation

A Control Strategy for T-Type Three-Level Converter to Suppr...

引用

IEEE Conference on Energy Internet and Energy system Integration (EI2)

作者： Guanfei Hao Chunguang Ren Baifu Zhang Jiansheng Kong Dongxin Guo Xiaoqing Han Shanxi Key Lab. of Power System Operation and Control Taiyuan University of Technology Taiyuan China

ISBN: (纸本)9781665434263

T-type three-level converter is widely used in high-current and low- voltage fields owing to its small number of power devices, low on state loss and high power density. Midpoint potential balance control of T-type converter is one of its key technologies. The neutral point potential imbalance increases harmonic distortion rate of output voltage and current, and reduce service life of DC side capacitor. This paper proposes midpoint potential balance control strategy in view of PIR-controlled zero-sequence voltage to control offset and fluctuation of midpoint potential. Functional model between midpoint current, reactive current and active current and the functional link between SPWM and SVPWM are established. The control strategy is simple in calculation and fast in dynamic response. It can realize midpoint potential balance domination under different power factors and the suppression of low-frequency voltage pulsation. Ultimately, simulations verify the effectiveness and correctness of proposed domination tactics.

关键词： Space vector pulse width modulation Electric potential Reactive power Fluctuations Voltage fluctuations Capacitors Modulation

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Variable Frequency Phase-Shift Modulation Technique for Single Stage Dual-Active-Bridge AC-DC Converter 11

Variable Frequency Phase-Shift Modulation Technique for Sing...

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11th International Conference on Power Electronics - ECCE Asia, ICPE 2023-ECCE Asia

作者： Guo, Dongxin Wang, Panbao Ren, Chunguang Guerrero, Josep M. Harbin Institute of Technology School of Electrical Engineering and Automation Harbin China Taiyuan University of Technology Shanxi Key Lab. of Power System Operation and Control Taiyuan China Aalborg University Department of Energy Technology Aalborg Denmark

ISBN: (纸本)9788957083505

This article proposes a variable frequency phase-shift modulation technique for single stage dual-active-bridge (DAB) AC-DC converter. This isolated single-stage single-phase converter consists of a DAB and a full bridge (FB) inverter. The proposed strategy applies a composite control strategy combining frequency modulation and extended phase shift (EPS) method to overcome the drawback of the non-linear power control of traditional phase-shift control scheme, which significantly reduces the complexity of the controller algorithm. Moreover, the synchronous inverter control applied to the back-end FB inverter is designed, which can realize the energy conversions in a single-stage, and a high frequency (HF) filter capacitor can replace the electrolytic capacitor at the output side DC-link. Thus, the safety of system operation improves and the power density of the system increases. Finally, simulation results confirm the validity and practical feasibility of the proposed control strategy. © 2023 The Korean Institute of Power Electronics.

关键词： Electrolytic capacitors

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Combination Result of Two MPPT Techniques (Fuzzy Logic and Perturb and Observe Method): Comparison with The Conventional Perturb and Observe Method

Combination Result of Two MPPT Techniques (Fuzzy Logic and P...

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IEEE Conference on Energy Internet and Energy system Integration (EI2)

作者： Djikeussi Ghislain Xuejin Li Shanxi Key Lab. of Power System Operation and Control Taiyuan university of technology Taiyuan China

ISBN: (纸本)9781665434263

Extracting maximum power from a photovoltaic generator, regardless of meteorological conditions, remains a challenge in the field of solar photovoltaics. Therefore, techniques have been developed to find the best operating point of a photovoltaic module. These include the conventional perturbation and observation method and the fuzzy logic technique. In this paper, we present the combination of two MPPT methods, namely the perturbation and observation method and the fuzzy logic method. We aim to show whether the combination of two different MPPT techniques for a solar system is more accurate and efficient in determining the peak power point than the conventional perturbation and observation method alone.

关键词： Maximum power point trackers Photovoltaic systems Fuzzy logic Perturbation methods system integration Generators Solar system

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A control Strategy of CLLLC DC Transformers under Unbalanced AC Voltage Conditions in Hybrid Microgrids

A Control Strategy of CLLLC DC Transformers under Unbalanced...

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IEEE Conference on Energy Internet and Energy system Integration (EI2)

作者： Jiansheng Kong Chunguang Ren Xinwei Wei Yue Qin Dongxin Guo Baifu Zhang Yifan Wang Xuejin Li Guanfei Hao Shanxi Key Lab. of Power System Operation and Control Taiyuan Unversity of Technology Taiyuan China

ISBN: (纸本)9781665434263

Under unbalanced AC microgrid voltage conditions in hybrid microgrids, DC microgrid bus will generate double frequency ripple voltage pulsation, which damages the voltage stability. In order to suppress the double-frequency pulsation, a control strategy suitable for CLLLC DC transformers is proposed in this paper. First, an equivalent model is established by first harmonic approximation to describe the fundamental wave of CLLLC DC transformers. On the basis, its voltage gain characteristics and input impedance characteristics can be analyzed. Then, considering the feature of the input voltage pulsation of the DC transformer under unbalanced voltage conditions, the parameters of the DC transformer are optimized according to the design index. Therefore, a control strategy based on the double frequency ripple voltage pulsation feed-forward is proposed and the PR controller is adopted to effectively suppress the DC bus voltage fluctuation when the input voltage is pulsing. Finally, the proposed voltage feedforward control strategy and parameter optimization de-sign are verified by the Matlab.Simulink results.

关键词： Voltage fluctuations Microgrids Transformers Mathematical models Indexes Impedance Voltage control

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Recovering high dynamic range radiance maps from in vivo fluorescence molecular imaging

Recovering high dynamic range radiance maps from in vivo flu...

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2011 2nd International Conference on Artificial Intelligence, Management Science and Electronic Commerce, AIMSEC 2011

作者： Song, Bofan Jin, Wei Jin, Qinhan Mu, Ying State Key Lab. of Industrial Control Technology Institute of Cyber-System and Control Zhejiang University Hang Zhou China

ISBN: (纸本)9781457705366

A recent development in molecular imaging is in vivo fluorescence molecular imaging with near-infrared light, which has extraordinary significance in early diagnosis of the disease. This paper presents a method of recovering high dynamic range radiance maps at in vivo fluorescence molecular imaging technology. Use differently exposed photographs to recover the response curve of the imaging process, with the known curve, can fuse a single, high dynamic range radiance map whose pixel values are proportional to the true fluorescence signal values in the scene. Will contribute to quilitative and quatitative analysis, offer better observation, and get information much more accurate and true. Have great significance for analysis and diagnosis. © 2011 IEEE.

关键词： Recovery

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The application of Ground Penetrating Radar in advanced prediction of tunnel

The application of Ground Penetrating Radar in advanced pred...

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2011 2nd International Conference on Mechanic Automation and control Engineering, MACE 2011

作者： Liu, Xiao-Zhou Sun, Qiao Liu, Peng Bai, Hui-Ren Key Laboratory for Prediction and Control on Complicated Structure System of Liaoning Province Dalian University Dalian China State Key Lab. of Frozen Soil Eng. Cold and Arid Regions Environ. and Engineering Research Institute Chinese Academy of Sciences Lanzhou China

ISBN: (纸本)9781424494392

Advanced prediction of the geological condition of anterior rock near tunnel's work area in the hydraulic tunnel construction not only to protect the safety for the construction unit, but also can save a lot of manpower, financial and material resources. Ground Penetrating Radar, GPR for short, has been widely used for its easy operation, rapid, nondestructive, veracity, intuition and etc. In this paper, the introduction of basic working principle and the application and skills of GPR in advanced prediction of water delivery tunnel was produced. © 2011 IEEE.

关键词： Nondestructive examination

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Adaptive Working Schedule for Duty-cycle Opportunistic Mobile Networks

Adaptive Working Schedule for Duty-cycle Opportunistic Mobil...

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IEEE International Conference on Communications

作者： Huan Zhou Hongyang Zhao Chi Harold Liu Jiming Chen State Key Lab. of Industrial Control Technology Zhejiang University Hangzhou China Department of Networked Computing IBM Research Beijing China

In Opportunistic Mobile Networks (OppNets), a large amount of energy is consumed by idle listening, instead of infrequent data exchange. This makes energy saving a challenging and fundamental problem in OppNets, since nodes are typically battery-powered. Asynchronous duty-cycle operation is a promising approach for energy saving in OppNets, however, if its working schedule is not effectively designed, it may also cause significant network performance degradation. Therefore, it is pressing to design an energy-efficient working schedule for duty-cycle OppNets. In this paper, we first analyze the contact process in duty-cycle OppNets, then propose an adaptive working schedule for duty-cycle OppNets. The proposed schedule uses the past recorded contact histories to predict the future contact information, so as to adaptively configure the working schedule of each node in the network. Finally, extensive real trace-driven simulations are conducted to evaluate the performance of our proposed schedule. The results show that our proposed adaptive working schedule is superior to the random working schedule in terms of delivery ratio and delivery delay.

关键词： Schedules Peer-to-peer computing Delays Mobile communication Contacts Mobile computing Adaptation models

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New type of fiber optic sensor network for smart grid interface of transmission system

New type of fiber optic sensor network for smart grid interf...

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作者： Huang, Qi Zhang, Changhua Liu, Qunying Ning, Yan Cao, Yongxing Chengdu Sichuan 610054 China Sichuan Provincial Key Lab. of Power System Wide-area Measurement and Control Sichuan Electric Power Test and Research Institute No. 23 Qinghua Rd. Chengdu 610072 Sichuan China

ISBN: (纸本)9781424483570

Smart Grid is aimed to incorporate monitoring, analysis, control and communication capabilities to improve reliability and energy efficiency. However, currently there is no enough sensor to provide information interface for the implementation of smart grid. Therefore, new types of sensors should be deployed to assist the implementation of smart grid. This paper proposes a novel scheme, in which new type of fiber optic sensors (as compared with traditional Farady effect based fiber optic sensor used in power system instrumentation) are used to provide multiple types of information for smart grid. The new Fiber Gragg Gratting (FBG) is advantageous in that it can collect variant types of information and can form a sensor network. A transmission line monitoring system with distributed fiber optic senor setwork is designed, and the procedures to evaluate the status of the overhead transmission line (such as sag, vibration, and galloping) are proposed. A testing setup is built at lab.ratory, and it is shown that the FBG sensor is capable of obtaining the comprehensive information for evaluating the status of the overhead transmission line. ©2010 IEEE.

关键词： Smart power grids

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