bluuebunny/crossref_metadata_2025 huggingface dataset:
Research for Fuel Common Rail System about Marine Diesel Engine
Authors: Wang Yuan Qing , Ren Guang , Zhou Zhi Qiang
Published: June 2014

Wartsila RT-flex 60C diesel engine is selected as the object to research pressure control of fuel common rail system, building the system simulation model, and analyzing main factors influencing rail pressure in the system. it was concluded that they were diesel engine speed, load. In the process of MATLAB/Simulink simulation, the rail pressure control logic was designed by adopting maps with the two factors as independent variables to get theory feedforward quantity of fuel rack, feedback quantity of fuel rack is obtained by fuzzy PID control. The simulation experiments show that the improved control method reduces the rail pressure fluctuation, at the same time the overshoot volume of dynamic rail pressure control is greatly reduced, response velocity quickened. The control method has been used in a Marine simulator.
Study on the Impact of Distributed Generation on Distribution Power Losses
Authors: Shi Hao Jie , Chen Xing Ying , Chen Kai , Liu Jian , Yu Kun
Published: June 2014

The impact of distributed generation (DG) on distribution power losses is closely related to DG technologies and load distribution. DG units are modeled as PQ, PQ(V) and PV nodes in power flow calculation. A revised back/forward power flow method is employed to calculate distribution power flow with various types of DG units. Power losses are computed when different types of DG units are connected to heavy load, general load and light load area apart. Simulation on IEEE 33-bus distribution network shows that connecting DG to heavy load area helps to maximize the loss reduction. And the installation of DG consuming reactive power will increase network losses unless reactive power compensation device is installed accordingly.
Dual-Power PV-Grid Energy System - An Alternative to the Off-Grid PV Energy System
Authors: Ibrahim Intan Rahayu , Omar Ahmad Maliki , Hussain Zakaria , Mohd Hussain Mohd Najib , Mohammad Noor Siti Zaliha
Published: June 2014

The Dual-power PV-grid energy system was initiated to reduce the capital installation cost of PV energy system and to make use the lower tariff rate offered at off-peak period. In this paper, the system configuration, architecture and operation of the system are described and discussed. The prototype has been developed and runs 24-hours to supply the load. Meteorological and electrical data collected prove the successful of such system. The system is expected to reduce 89% of electricity bill with estimated cost of energy (COE) of USD1.15/kWh. It is suggested that the dual-power PV-grid system is beneficial to serve as an alternative implementation of the off-grid PV energy system.
Exergy Analysis and Improvement of the Thermal System of Power Plant
Authors: Zhao Bao , Yang Li , Wang Jia Li
Published: June 2014

We took 600 MW sub critical unit of Taishan power plant as the research object and modeled. Analyzed the thermodynamic system by exergy method. Got the amount of exergy loss, the exergy efficiency of regenerative heater and so on. Found out the distribution of different kinds of exergy loss in the power plant with giving out the scientific and reasonable explanation and the weak point. Then increased the efficiency of thermal system by adding external steam coolers for high pressure heaters.
Research on Comprehensive Evaluation Index System for Distribution Network Planning Alternatives
Authors: Lu Xun , Zhou Yang , Zhang Kai Min , Wu Jia Si , Yang Xue Ying , Zhang Bu Han , Jin Bing Jie , Shao Jian , Ge Teng Yu
Published: June 2014

In order to identify weaknesses in distribution network planning alternatives, providing a scientific basis for grid investment decisions, effective and comprehensive evaluation is needed. According to the related principles and objectives, this paper establishes a comprehensive evaluation index system based on hierarchy. This system is guided by the long-term development strategy of China southern power grid, including six strategic layer indices as safety and reliability, economic efficiency, coordination and flexible, smart and green, controllable risk and social benefits. The meaning and classification of every index is listed in details. According to different technical characteristics of every index different fuzzy membership functions are structured. Furthermore, in accordance with the relevant guidelines and specifications, this paper gives specific values of the membership function parameters to achieve standardization of indexes of different dimensions, laying the foundation for a comprehensive assessment.
3-D Dynamic Simulation System in the Application of the Power Plant Steam Turbine Overhaul
Authors: Li Shao Hua , Song Yang , Wang Tie Ying
Published: June 2014

With the rapid development of the power industry, there has been more and more large thermal power unit which is more than or equal to 600MW , steam turbine equipment gradually tend to be high parameter, large capacity, complicated, the overhaul maintenance to steam turbine is the main content of the power plant production activities, it directly affects the reliability of the coal-fired power plant production safety. Aimed at the complexity of thermal steam turbine overhaul, by the use of advanced interactive devices on the visual, do an auditory perception of the virtual environment for something, which is helpful to improve practical operation skills. This paper examines the necessity and superiority of this system applied in education and training. Taking 3-D dynamic simulation system of building as an example, this paper discussed how to utilize the SolidWorks2012 and VRP - SDK to build a virtual training system, realized the combination with virtual reality and education training ,also greatly promoted science and technology progress，equipment of the steam turbine overhaul industry.
Low Temperature Selective Catalytic Reduction of NO on CeO2-Fe3O4/TiO2,CeO2 /TiO2 Catalysts Prepared by Coprecipitation Method
Authors: Zhen Wen Long , Guo Rui Tang , Pan Wei Guo
Published: June 2014

CeO2-Fe3O4/TiO2and CeO2/TiO2catalysts were prepared by coprecipitation method, and their activities for selective catalytic reduction of NO with NH3were investigated. As can be seen from the experimental results, the CeO2-Fe3O4/TiO2catalyst prepared showed the best SCR activity and SO2resistance. Based on the characterization results of BET, XRD, NH3-TPD and XPS the excellent performance of CeO2-Fe3O4/TiO2catalyst should be resulted from its large surface area, high NH3adsorption capacity and high concentration of surface chemisorbed oxygen.
Compare the Petrophysics of Formation Type I and II by Mercury Injection Curve Normalization
Authors: Chen Ling Yun , Liu Yi Kun , Xia Li Hua , Liu Qian
Published: June 2014

Study on Formation Type II is so few that affect on tapping the potential [2]. Analyzing petrophysics of Formation Type I and II by mercury injection curve normalization, it’s vital to developing method choice on tapping the potential of Formation Type II. Capillary pressure curves (Pc-curves) from conventional Mercury Injection are hard to analyze and compare because of various shapes. To get typical capillary pressure curves for Formation Type I and II, the curves from Mercury Injection is processed by Function J, and the J function curves and normalized Pc-curves for tabulated thin layers, tabulated thick layers and un-tabulated layers in Formation Type I and II, compare and analyze the influence of permeability on the shape of J function curves and normalized Pc-curves; compare the influence of different kinds of layers with the same permeability order of magnitude on the shape of J function curves and normalized Pc-curves, i.e. the influence of other factors except permeability, to get some visual identification methods and analyze the petrophysics difference between Formation Type I and II which is shown on Pc-curves.
Economic Analysis of Buried Corrugated Steel Culverts Considering Deterioration
Authors: Zhi Chun Hong
Published: June 2014

The characteristics of the corrugated steel culvert and the deterioration of the structure are analyzed. The Life Cycle Cost (LCC) approach is put forward to analysis the initial, maintenance and recycling cost of the different material culverts. The user delay costs are added to the typical LCC values considering the deterioration and the failure of structures. The analysis and the economic comparison results show that the total LCC values at the failure emergency situation is much larger than the situation when the deterioration is considered initiatively. Such economic analysis can help the project decision makers better understand the risks associated with deterioration and failure. The inspection and maintenance schedule should be formulated considering the culvert size, the environment in which the culvert is placed, and the characteristics of the soil and the backfill.
The Combination Sewage Treatment Process of Nanofiltration and Photocatalytic Oxidation for the Removal of Endocrine Disruptors
Authors: Deng Fei Fan , Yang La Mei , Deng Zheng Dong , Xu Guo Fu
Published: June 2014

The potential hazard effects of Endocrine Disruptors (EDCs) are drawing growing attention from the public,and the traditional sewage water treat process works in an unstable way in the removal of EDCs and can be influenced by many factors.The membrane technology shows good interception efficiency of EDCs,and the photocatalytic oxidation,with its wide application range of different types of polluted water,can thoroughly convert EDCs to inorganic materials.The combination process of nanofiltration and photocatalytic oxidation can easily extract EDCs from the water at first step,and decompose the EDCs in the concentrated polluted water and the back fluch water collected at the second step.The combination process is a reliable,practical and effective methods for EDCs removal.
The Effects of Surface Shape of Microchannels on Methane/Moist Air Catalytic Combustion
Authors: Ran Jing Yu , Wang Rui Rui , Qi Wen Jie , Wang Jun Lei
Published: June 2014

This paper studied the methane/moist air combustion characteristics in smooth microtube and microtubes with five different shape grooves and proposed the microtube groove dimensionless shape factor F=4πS/L2. The results show that the appearance of five grooves make combustion components and velocity occur jumping change and the vortex flow appears. The highest methane conversion rate is for the microtube with triangle grooves, which also indicates that the smaller shape factor is more in favor of methane conversion.
Numerical Simulation on Separation Characteristic of an Elbow Bias-Oriented Rich-Lean Burner
Authors: He Nan , Zhao Xing Hai
Published: June 2014

In order to solve the problem of that the boiler burns inferior coal but cannot guarantee the combustion stability, the rich-lean burner divides primary wind pulverized coal airflow into two stocks of airflows containing different amounts of pulverized coal and sends the airflows into coal-fired furnace for improving the ignition characteristics. By the numerical simulation of the pulverized coal flow characteristics in an elbow bias-oriented rich-lean burner, regarding the “concentration ratio” and “speed difference” as the standard of evaluating the separation characteristic of the burner, considering the influence of the partition plate length, bias current stopper height and primary wind velocity to the separation effect of pulverized coal so as to provide technical assistances for the elbow bias-oriented rich-lean burner’s practical application and improvement.
Study of Hot Surface Aviation Fuel Thermal Ignition Pattern
Authors: Liu Bo Yun , Liu Min Lin , Liu Yan Hong
Published: June 2014

Fuel evaporation and ignition process on the high-temperature hot surface are difficult to be predicted accurately. The rule of fuel evaporation and ignition delay that various with hot wall temperature have been obtained by utilizing the simulated experiment to study the evaporation and ignition process of aviation fuel on hot surface. This study complements the related content of the fuel ignition mechanism on hot wall,at the same, reference method for fuel fire engineering practice has been provided.
Study of Automatic Temperature Measurement of Foundation Ditch and Froze Soil’s Retaining Wall and System of Wireless Transmission
Authors: Huang Fei , Zhao Da Jun
Published: June 2014

Supporting of deep foundation of ditch has become outstanding issues. As a kind of effective supporting measurement, independent development of automatic temperature measuring system and wireless transmission system Foundation ditch and froze soil’s retaining wall has been taken into account. According to study of automatic temperature measurement of foundation ditch and froze soil’s retaining wall and system of wireless transmission, this paper gets its own result. It plays an important role in temperature in foundation ditch and froze soil’s retaining wall and survey in change of froze soil’s retaining wall. And at the same time, we can transfer information and reduce the possibility of damage wire in engineering site. Foundation ditch and froze soil’s retaining wall is a kind of environmental. It has an important meaning in deducing cost of foundation ditch and environmental construction.
Optimal Performance of the Irreversible Heat Pump Driven by Steam Turbine
Authors: Zhao Qi , Wang Chen , Liu Li Xin
Published: June 2014

In this paper, a generalized irreversible heat pump driven by steam turbine cycle model was established by taking account of the heat resistances, heat leak and irreversibility due to the internal dissipation of the working substance. The heat transfer between the heat reservoir and the working substance is assumed to obey the linear (Newtonian) heat transfer law, and the overall heat transfer surface area of the assumed to be constant. The fundamental optimal relations between the heat load, the thermal coefficient of the system and the temperature difference of the evaporator are obtained. Moreover, the effects of the cycle parameters on the characteristics of the cycle are studied by numerical example. The results obtained herein have realistic significance and may provide some theoretical guidance for the performance improvements and optimizations of heat pumps driven by steam turbine.
Effect of Design Parameters on Air Entrainment and Oxygen Transfer of Central-Driven Ejector
Authors: Kim Dong Jun , Du Hui Wei , Kim Kyuho , Peng Lu , Yang Heicheon
Published: June 2014

The objective of this study is to investigate the air entrainment and oxygen transfer characteristics of central-driven ejector with various ejector design parameters. The ejector design parameters are primary nozzle diameter, mixing tube length and diffuser angle. The entrainment ratio decreased with the primary nozzle diameter and diffuser angle, while the ratio increased with the mixing tube length. The trend of dissolved oxygen concentration with the diffuser angle and mixing tube length is equal to the result of entrainment ratio, however, the trend with the primary nozzle diameter is different to the result of entrainment ratio.
Simulation of Effect of Structural Parameters on the Ejector
Authors: Li Bin , Li Hai Xia
Published: June 2014

The effect of structure size on the flow field in the ejector was investigated by simulating structural parameters of ejector. Simulation results show that the shock occurred in the flow field of the ejector. The entrainment coefficient shows different trends as different structure parameters change. The effects of nozzle position, inlet diameter and nozzle exit ratio were studied respectively. The simulation result revealed that the structural parameters impact the performance of the gas ejector, having certain engineering application value.
Analysis of the Heating and Energy Saving Effect of Capillary Radiant Ceiling in Hot Summer and Cold Winter Area
Authors: Wen Qing Mei , Yang Dong , Chen Ming Jiu , Li Yong An , Wei Shi Jun
Published: June 2014

This paper introduces the advantages of capillary roof radiant heating system, by using finite element numerical method, the indoor temperature distribution of capillary radiant roof and underfloor supply air composite system is simulated, using the theory of exergy to analysis the energy saving of the system, the result proves that the system can well satisfy indoor comfort requirements, and compared with the floor radiation heating system can saving energy 65.8%, has great research value.
Analysis on Heat Transfer Energy Efficiency of U-Tube Buried Pipe under Variable Entering Water Temperature Conditions
Authors: Cui Yu Zhou
Published: June 2014

Taken as the carrier of heat extraction between rock-soil body and ground source heat pump systems, U-tubed pipe heat transfer efficiency was the key for ensuring the long-term and high-performance operation of ground source heat pump systems by means of improving the heat transfer effect. The efficiency coefficient, E, is defined as the ratio of the actual heat transfer capacity to the theoretically maximal heat transfer capacity from the U-tube into rock-soil body, which illustrated the effect of heat transfer ability and the variable heating or cooling loads. Aim at Variation characteristics of heat transfer coefficient of energy efficiency under the variable temperature inflow condition, decomposed into the product of the ratio of biggest buried tube heat transfer temperature difference φ and heat pump outlet water temperature difference σ. Use of u-shaped buried pipe three-dimensional heat transfer model which based on the multipole theory, the influence law of its change which caused by the construction load, buried pipe flow and the unit performance were analyzed, it can provide technical support to optimize the design of ground source heat pump system.
Design of Virtual Corolla 1.6AT Automatic Air Conditioning Experiment Bench
Authors: Gong Wen Zi
Published: June 2014

This paper introduces a virtual experiment bench for automotive air conditioning. In the experiment bench based on the experiment bench for Corolla 1.6AT automatic air conditioning, the refrigeration, heating, gas distribution and other mechanical systems are removed and the electrical control system is reserved using the virtual and simulation theory. The experiment bench has the features, such as simple structure, low production and operation cost, safety and environmental protection; its main sensor signals are simulated through a variable resistance, the working processes of some actuators are shown by light bulbs, so that it is easy to operate the experiment bench, and the working process is visual and direct. The experiment bench can be self-developed, designed and produced by students under the guidance of teachers, thus to promote the comprehensive ability of students to use knowledge and innovate.
Wetting Property of Cu-Doped ZnO with Micro-/Nano-Structures
Authors: Cao Shuai , Xu Chun Hua , Huang Ya Bo , Liu Min , Guo Zi Hao , Cheng Bo Wen , Duan Hai Yang , Han Lin Ge , Fan Ya Nan , You Yu Fei
Published: June 2014

ZnO with different morphologies were formed on Zn foils immersed in various concentrations of CuSO4 solutions. Then the specimens were heated at temperature of 200~600°C in air for 3h. The morphologies of as-prepared specimens were characterized by a scanning electron microscope (SEM). Water wetting angles on the specimens were measured. The results indicate that the morphologies of ZnO on the Zn foils relate to the CuSO4 concentration of in solutions. The morphologies on the specimens with dual-scale (nanoand micro) structure have higher wetting angles than those with flat structure. The water wetting angles can reduce with the increase in annealing temperatures of immersed specimens. The water wetting angles increase with keeping immersed specimens at room temperatures. The change of the wetting angle is explained by absorption of organic carbon on specimen surface and the geometric structure of the surface.
Experimental Research on Heat Transfer of Closed Cooling Tower with Packing
Authors: Zhou Ya Su , Ding Xiao , Xie Wei
Published: June 2014

Three different structural types of closed cooling tower (CCT) and two cooling water flow directions were considered. The experimental study were done on the cooling performance of influences of inlet air dry and wet bulb temperature, cooling water flow rate and inlet temperature, air flow rate and spray density. The experimental results show that the cooling performance of CCT with packing is obviously better than non-packing cooling tower in 7%~18.4%. And the cooling performance of CCT with packing on top and coil underneath is slightly better than CCT with coil on top and packing underneath in 4.9%. In the same conditions the cooling performance of CCT with packing under cooling water cocurrent-flow is better than that cooling water countercurrent-flow in 3.2%~9.6%. Therefore, the closed cooling tower structure with the cooling water path in bottom and out top, and with packing on top and coil underneath is recommended.
Numerical Simulation of UFAD Conditioned Space under Summer Part-Load Conditions
Authors: Ma Qiao Yan , Zhao Shu Xing , Huang Long , Deng Cheng
Published: June 2014

The air conditioning system did not run as the design conditions in most of the time. Therefore, how to rationally adjust air parameters under part-load conditions caused by changes in the outdoor environment is an important issue, which is crucial to people’s comfort and energy systems. This paper introduces the part-load rate α to distinguish among different load-part conditions. And by taking the typical conditioned space of underfloor air distribution (UFAD) system in perimeter zone of New Tianjin Library as the object and using Fluent for simulation analysis, we get the conclusion that there is a maximum limit of supply air temperature and a minimum limit of supply air velocity under summer part-load conditions. For each condition, there is a set of optimal air parameters to make the indoor personnel achieve the most comfortable condition. Finally, we acquire this set of optimal air parameters by simulating and analyzing.
The Enhancement of a Chronically Implanted Microwire Electrode Performance
Authors: Shi Li , Chen Jian Wei , Wang Song Wei
Published: June 2014

Electrodes are expensive consumables of electrophysiological experiments. Cheap and homemade microwire electrodes have been widely applied, but their implantation performance is not good. To fabricate low cost and acceptable performance of microwire electrode, first, we analyzed the key factors affecting the long-term recording performance and determined the direction of the enhancement of electrode. We improved the existing fabrication process through electrode fabrication and the electrode tip surface modification, and systematically evaluated its properties, signal acquisition ability and biocompatibility. The result shows that the improved electrode tip surface is smooth and tidy, and its impedance decreased by 56.1% on average; record signal-to-noise ratio is higher; recording longevity reached 45 days; biocompatibility is better. It can meet the use of the general electrophysiological experimental, and electrode fabrication cost is less than 58 yuan.
Electron Beam Irradiation on Substrate for Precise Dielectrophoretic Assembly of Carbon Nanotubes - A Simulation
Authors: Chen Yan , An Li Bao
Published: June 2014

The effect of electron beam irradiation on permittivity of silicon dioxide insulate layer was investigated. Theoretical analysis indicates that electron beam irradiation will change the permittivity of SiO2through decreasing the molecular number per unit volume and increasing the polarizability of the sample. The escape of impurities during irradiation decreases the permittivity while the accumulation of space charge increases the permittivity. Simulation results show that with the change of permittivity, the electric field of the area irradiated by electron beam is strengthened locally and carbon nanotubes (CNTs) are more likely attracted to this area by dielectrophoresis. Therefore, the method could be used for precise positioning of CNTs for various applications in many areas including nanoelectronics, sensors, and new energies.
Influential Factors of Suspension Insulator AC Pollution Flashover Voltage: A Survey
Authors: Shen Qing
Published: June 2014

To make up insufficient of ESDD in insulator flashover voltage analysis, and A more comprehensive assessment of antifouling properties of insulators. This paper discusses the factors of suspension insulator flashover voltage of the AC, analyzed the influence of these factors on the flashover voltage, found the reason for large differences of the current test results of research institutions at home and abroad, and proposed future research directions.
Fault Line Selection in Resonant Grounded System Based on IMEn
Authors: Zhang Meng , Ren Jian Wen
Published: June 2014

When the single phase ground fault occurs in resonant grounded system, there are significant differences in the components of fault phase current between fault line and non-fault line. This feature can be reflected by intrinsic mode entropy (IMEn) of fault current. IMEn is a new signal analysis over multiple oscillation levels. It corresponds to the sample entropy (SampEn) and the empirical mode decomposition (EMD). The results of fault simulations in different conditions indicate that the method is reliable.
Study on Influence of Snowmelt Agent to Performances of Asphalt
Authors: Yang Jin , Liu Li Xia , Xiao Peng Fei
Published: June 2014

To study the influences of snowmelt agent to performances of asphalt,three snowmelt agents of NaCl,CaC12,CH3COONa·3H2O were used to make asphalt sample and experiments about performances of high temperature and low temperature of asphalt were done.The results indicated that: temperature sensibility of 90# asphalt was reduced, softening point was increased ,dynamic viscosity was increased and ductility was reduced after being dealedwith snowmelt agent; Residual penetration ratio and residual ductility were also reduced after being dealedwith snowmelt agent.
A Method of Introducing PMU Current Measurement to Nonlinear State Estimation
Authors: Kun Zhao , Lei Yan , Li Li , Li Qiang , Lang Yan Sheng , Jia Pei Yu
Published: June 2014

Aiming at the problem that the current measurements provided by phasor measurement unit (PMU) is difficult to introduce to traditional state estimation, a new method to solve the compatibility problems of PMU and supervisory control and data acquisition (SCADA) is presented in this paper. By the rotated-pseudo-measurement (RPM) method, current measurements are transformed into the pseudo measurements and decoupled in polar coordinates, so that they could taken into nonlinear state estimation. Then the RPM method is simulated compared with the current transformation (CT) method. According to the result, it is showed that the RPM method has many advantages compared with the CT, such as independence of other measurements, small error in propagation and more significant in improving estimation accuracy. Moreover, the RPM method has the compatibility with traditional nonlinear state estimation and the fast calculating speed, which have good prospects of practice.
Design and Implementation of a Rotary Inverted Pendulum Using Model-Based Design
Authors: Pan Yun Hao , Meng Peng Fei , Ge Run Zhou , Mao Ze Yu
Published: June 2014

Aiming at the characteristic of nonlinear and natural unsteadiness in rotary inverted pendulum system. This kind of system uses the DSP TMS320F28335 of TI as the control and testing core of this system, adopts DC motor JGB37-3530 and motor drive L298, high precision potentiometer WDY35D4 as sample controller. Angle-to-resistance-to-voltage conversion is achieved by potentiometer, sensors export analog voltage to the first-order filter for filtering noise and transmit signal to the interior of TMS320F28335 and take ADC sample, then use digital filter algorithms to filter the signal again. Finally using double-loop PID control scheme to control motor precisely. Both DSP algorithm and program are implemented by Model-Based Design in Matlab, according to the process of model-simulation-code generation, this rotary inverted pendulum realizes the function of pendulum inverted and rotated. Experiments show this system has a stable and rapid transient process, possesses good stability and resisting disturbance.
Modeling and Testing of Hybrid Energy Microgrid with Wind Turbine and Photovoltaic Power
Authors: Zhang Yu Feng , Xu Wen Qiang , Dai Zhi Yong , Wang Qiang Gang , Zhou Nian Cheng
Published: June 2014

Modeling of the wind and PV hybrid microgrid is carried out by PSCAD/EMTDC. The model includes direct-drive wind power generator, Single-stage photovoltaic power generation system and storage battery. Simulate and analyze the operating characteristics of the microgrid running in grid-connected and islanding mode, which take into account the actual wind speed and light intensity. The simulation results show that the battery is able to regulate the voltage of the point of common coupling and smooth the power fluctuation of wind generator and PV generation system in the grid-connected mode. The microgrid can isolate itself from the grid in a rapid and seamless fashion when the battery adopting P/V and Q/f control strategy based on the droop characteristics.
Suppression of Stochastic Pulses Interference in XLPE Cables Based on Fuzzy Clustering
Authors: Mai Hong , Chen Xiao Xin , Li Yan Ran , Wei Chong , Zhang Yi Ming
Published: June 2014

To suppress the stochastic pulse interference in XLPE Cables, this paper uses equivalent time-frequency method to extract pulse feature values, adaptive fuzzy clustering to classify pulses, phase concentration as an index to distinguish PD and stochastic pulses. Analysis results of on-site data show that this method can effectively suppress stochastic pulse interference in the PD signal, providing a useful theoretical and practical basis to assess the state of XLPE cable insulation.
Impacts of UHV on Short Circuit Currents in China's Central 500kV Grid and Its Countermeasures
Authors: Zheng Xu , Wang Jiang Hong , Li Mei , Zhao Shuang , Zhang Bu Han , Zeng Yuan Fang , Zeng Ni , Zhu Ruo Xi
Published: June 2014

Ultra-high voltage (UHV) projects are making power system growing lager and resulting in sharp increase of short circuit currents in some area especially in the vicinity of UHV access points. The paper presented the damage of short circuit current increases and common methods to limit fault current. Taking the construction and development of UHV grid in a province of central China as background, the over short circuit currents in 500kV Grid within UHV were showed and several countermeasures including choosing proper UHV access scheme, implementing UHV substation lower voltage bus partition running, installing reactors, optimizing power grid network based on UHV connection point were proposed and then verified by PSASP simulation. The results show those measures are useful to reduce the short circuit current to a reasonable level.
Aggregation of Loads with Distribution Network Considered
Authors: Zhang Jian , Yuan Xiao Dong
Published: June 2014

This paper proposes a methodology for the aggregation of distribution network, induction motors and static loads. This methodology can aggregate induction motors and static loads model into one composite load model with distribution network considered. The absence of simplifications, the proper aggregation of distribution network and the adequate handing to motor mechanical load allow this methodology shows pretty good accuracy. A simple simulation test is also taken to validate the proposed methodology.
Coal Mine Safety Management Researching Situation Analysis Based on Knowledge Map
Authors: Li Hong Xia , Zhao Long Zhao
Published: June 2014

In order to understand the characteristics and law of development of coal research in the field of safety management, the papers published data from 1993--2013 based on Web of Science database and the Java platform development CitespaceIII visualization software for scientific knowledge map drawing is used. Through the knowledge map visualization analysis, it shows the origin of the research of international coal safety management and foundation of knowledge, and its basic and frontier disciplines. The results show that: through the visual keywords co-occurrence knowledge mapping analysis, high frequency keywords and high degree of heart keyword ranked in the top 10. It also shows the hot spot area and the development trend in the research field of coal safety management; from the literature co-citation results, classical literature and knowledge of basic research on coal safety management field, it plays an important role in the development process of the research in the field of visualization; through the journal co-citation analysis of knowledge map, it gets higher yield and literature journal, such as SAFETY SCI, COAL SCI TECHNOLOGY, CHINA COAL and the like, which shows that in the study of coal safety management field quantity of periodicals, China is the first, which explains China's leading position in the field of safety management of coal.
Numerical Simulation of Mining Overburden and Surface Deformation Law
Authors: Zhao De Shen , Guo Dong Liang
Published: June 2014

In order to obtain overburden and surface deformation law, this paper takes S2S9 working face fully-mechanized mining of certain coal mine for example, uses the finite element ADINA software, and it establishes two-dimensional numerical model, analyzes overburden and surface deformation caused by the working face mining. The study shows the amount of each point movement in the top of the mined-out area gradually decreases from the bottom to up, and the range of surface movement is also increasing with advancement of the coal excavation. After the completion of the working face, it forms a subsidence curve which is symmetry for the maximum vertical point and an antisymmetric horizontal deformation curve. The zero point of horizontal movement is located above the center of mining sector, and the maximum tilt is 2.044mm·m.
The Application of Numerical Simulation in Feasibility Research of Ascending Mining
Authors: Zhao Bao Feng , Ma Lian Jing
Published: June 2014

In order to study the feasibility of the ascending mining in Maiduoshan coal mine, the “two belts” of 6# coal should be predicting. Based on the analyzing of mine hydrogeological conditions, the three-dimensional numerical model is established by the FLAC3D, the scope of “two belts” by lower coal mining is predicted. The results shows that the fracture zone height of 6# coal less than the distance between 6# coal and 2# coal, and Maiduoshan coal mine meet the requirement of ascending mining. At the same time, combining the ratio method and balance analysis of surrouding rock, ascending mining is feasible in Maiduoshan coal mine.
Characteristics of Hydrocarbon Accumulation of Putaohua Reservoir in Xingnan Area of Daqing Placanticline
Authors: Luo Yong , Wu Jian Guo , Zeng Fang , Huang Ding Jie , Bai Ya Dong
Published: June 2014

Through comprehensive study on the combination of each accumulation of Putaohua Reservoir in Xingnan area of Daqing Placanticline, analyzing the controlling factors of hydrocarbon accumulation, accumulation rule and the corresponding exploration ideas, Enriching and developing the study of non-structural reservoir in slopes and depressions of Daqing Placanticline. The study shows that faults are well-developed, especially oil source faults which were active during the crucial moment of hydrocarbon accumulation, as for connecting source rock and reservoir and poor sealing capacity, they are the main passage for hydrocarbon migration. The relations between oil source faults and reservoir greatly restrict the distribution and scale of reservoirs. Accurate evaluation of the relationship between faults and reservoirs has an important significance which can give a guide to the surrounding exploration of Daqing oilfield and improve the success rate of exploration.
The Development of Beijing’s Low-Carbon Transport: Status, Problems and Countermeasures
Authors: Li Yun Yan , Xian Ying Nan
Published: June 2014

In the rapid process of urbanization, the transport facilities in Beijing have developed swiftly with the increase of motor vehicles. The problem of traffic congestion, energy consumptions and carbon emissions are becoming increasingly prominent. Based on the statistics of people trip survey in Beijing from 2005 to 2010, it predicted the development of transport under various scenarios and calculated the carbon emissions of different transport modes by using low-carbon transport model. Vigorously develop public transport and zero pollution of bicycle transport is the inevitable trend to realize low carbon transport.
Some Experiences that Shanghai can Learn from California on Carbon Emissions Allowance Allocation System
Authors: Zhu Xiao Qin , Zheng Yi Yu
Published: June 2014

California’s experience on establishing a carbon emissions trading system has been of some reference for Shanghai, China. This paper analyzes some insufficiencies of carbon emissions allowance allocation system in Shanghai, and tries to put forward some suggestions for Shanghai based on California’s experience.
Study on the Countermeasures of China’s Agricultural Products Export to Cope with Low Carbon Trade Barriers
Authors: Lu Jian , Shao Hong Ling , Cui Hai Xia
Published: June 2014

Under the background of global climate warming, the low carbon economy has become the focus of international attention. Some developed countries construct the low carbon trade barriers and implement trade protection on the grounds of environmental protection. This makes the cost of China’s agricultural products export increased, the scale of China’s agricultural products export reduced and the exertion of the traditional comparative advantage of China’s agricultural products inhibited, but at the same time promotes the development of China’s low carbon agriculture. The paper puts forward some countermeasures to cope with the low carbon trade barriers from the point of view of government and enterprises.
A Research Framework of Green Consumption Behavior Based on Value-Belief-Norm Theory
Authors: Cheng Qiao Lian , Wang Jing Jing , Yin Li Guo
Published: June 2014

In recent years, China economy has been developing in a high speed, but along with the development, there are some environmental problems such as environmental degradation etc. To solve the environmental problems, we can’t only depend on the government policy, or the enterprises’ production of green products. What is more important is to promote green consumption behavior of consumers. This paper tries to explore the mechanism of individual green consumption behavior based on the theory of value-belief-norm, aiming to build the research framework for individual green consumption, which will be significant to the further research of the individual green consumption behavior and the promotion of green product.
PGE Geochemical Characteristics of the Huangshanxi Magmatic Ni-Cu Sulfide Deposit, East Tianshan, Xinjiang, and its Significance for the Mineralization
Authors: Fu Yong , Sun Tao
Published: June 2014

The Huangshanxi sulfide-bearing intrusion, is located in the centre segment of Tudun-Huangshan-Jing`erquan-Tulargen mafic-ultramafic rock belt, the eastern part of the North Tianshan, controlled by the Kangurtag-Huangshan ductile sheer zone, and it is a multiple intrusion which composes of lherzolite, amphibole peridotite, wehrlite, pyroxenite, norite, gabbro, and diorite. The disseminated sulfides and sideronitic sulfides are the mainly ore types, the scale of the ore body is large and the grade is stable relatively. The total concentration of platinum-group elements (PGEs) in rocks and ores is very low, which average value is 0.93ppb and 8.8ppb respectively and it increases with sulfur content increases in ores. The PGE concentration appeared two peaks in the range of 200~300m and 880~980m depth in the drill core, consistent with the content of the sulfides. Rocks and ores samples have similar mantle-normalized PGE patterns which are shown as the PGE flat and slightly fall to the left, and the lower fractionation between IPGE and PPGE. The primitive magma may be the high MgO tholeiitic magma which should be undepleted in PGE and derived from partial melting of a metasomatized mantle source. Compared with continental tholeiite, simulating result reveals that the parental magma is visibly depleted in PGE, possibly duing to the sulfide pre-segregation of initial magma in deep crust. The platinum-group elements geochemical characteristics and petrochemical data show that the crustal contamination and the fractionation of olivine and pyroxene may be the main factors leading to S-saturation and sulfide segregation in deep crust.
Low Carbon Industrial Park Green Infrastructure Planning Control Strategies Discussed
Authors: Liu Li Rong , Liu Yong , Li Xin Yuan , Li Xin
Published: June 2014

The main purpose of this paper is to optimize the developing pattern of the industrial park, make it fully work for the social environment and economic benefit. Based on green infrastructure and function analysis, this paper discusses about the planning control paths of building the elastic ecological pattern, water recycle, clean energy, green traffic and planning control system by putting the concept of green infrastructure into the linkage of the industrial park and urban construction process. It also proposed the control strategy, which combined low-carbon development of industrial park with green infrastructure, to boost a sustainable development of low-carbon green industrial park.
The Research on Establishing Monitoring Reporting Verification (MRV) of Carbon Emission in Hospitality
Authors: Huang Qi , Huang Chen Hao , Kang Jian Cheng
Published: June 2014

Recent years the hospitality in China has undergone a rapid growth, yet "high input, high consumption, high pollution" characteristics of hospitality have become a burden for future development. The prerequisite for energy saving and emission reduction in hospitality is to establish an effective energy consumption assessment system, which is suitable for the hospitality industry. Though the analysis of the data collected from the hotels in the eastern China, the paper establishes the frame of Monitoring Reporting Verification (MRV) and a multi-dimension comprehensive energy consumption assessment system. Then, the paper assesses the energy consumption of various hotels by using the Monitoring Reporting Verification (MRV) and draws a few conclusions, which provide firm foundations for carbon trading in hospitality and benefit energy saving and emission reduction.
Predicted Enhanced Coalbed Methane Recovery and CO2 Sequestration in West Henan Province
Authors: Chen Run
Published: June 2014

CO2injection into coal seams can not only enhance coalbed methane recovery (ECBM), but also reduce greenhouse gas emission into atmosphere. This paper describes some factors affecting CBM primary production, ECBM recovery and CO2sequestration in coal seams; and calculates CBM recovery quantity with primary production, the ECBM recovery potential quantity and CO2sequestration capacity in coal seams of West Henan Province. The results show that CBM primary and ECBM recovery potential quantity are estimated to be over 2147.278 and 1656.217 Gm3. The prediction also indicates that CO2sequestration potential quantity is about 3233.79 Gm3.
German Energiewende and its Implications for China
Authors: Wang Qian Kun
Published: June 2014

Germany’s strategic choice of Energiewende is closely related to its specific political, historical, economic and energy resource backgrounds. Renewable Energy has long been the core element of German Energiewende. Boosted by favorable incentive policies, renewable energies such as wind power and PV installations has experienced a rapid growth in the last decades. But the rapid expansion of renewable energies also leads to skyrocketing cost for electricity consumers, grid incapability of integrating large scale distributed generators and insufficiency of generating capacity. To cope with these problems, the federal government is considering a thorough revision of its policy framework for renewable energies. The key idea is that, the development goal should be set more rationally, more attention should be attached to economic affordability, and capacity market should be considered in the medium term to ensure reliable operation of power system.
Analysing the Sustainable Development of Coal Resources in Shanxi Province from the Perspective of Coal Reserves
Authors: Wei Chun Chen , Hu Chun Xiang , Yu Zhi Wei
Published: June 2014

The coal production capacity is determined by many factors, such as geological conditions, production conditions, transportation conditions, environmental factors, coal reserves and so on. The coal reserves play a fundamental role in these factors. Therefore, this paper analyzes whether existing reserves in Shanxi Province could support coal production target which is made by government of Shanxi Province after the integration of coal resources from the perspective of coal reserves. The purpose of this paper is to achieve better sustainable development of coal resources in Shanxi Province.
China's Energy Trade Transformation Theory - A Study Based on the Ecological Footprint Model
Authors: Wang Yan , He Shan Shui
Published: June 2014

The implementation of China's export oriented trade policy had brought huge trade surplus at the same time, the ecological deficit was huge in recent years.Therefore, the eighteen Party Congress proposed the building of ecological civilization, to control energy consumption. In this context, this paper used the ecological footprint model to analyze China's energy trade transformation, through the measurement of 2002-2010 years of energy trade, energy trade ecological deficit were found, it provided theoretical basis for China's energy trade transformation. Based on the ecological deficit it puts forward the corresponding countermeasures, developing new energy, strengthen ecological system management and change the trade structure.
The Lithofacies Palaeogeography and Control of the Reservoirs in Middle Ordovician Ma541 Submember in Western Jingbian Tableland
Authors: Luo Shun She , Lv Qi Qi , Hu Guang Ming
Published: June 2014

The major rock types of Ordovician Majiagou Formation Ma541 Submember in western Jingbian Tableland include muddy dolomite, gypsum-bearing dolomite, gypsum dolomite, limy dolomite, and muddy powder crystal dolomite. This paper is based on the theory of sedimentary petrology and with the methodology of comprehensive mapping by using single factors to analyze multiple factors.Using stratum thickness, the content of gypsum and penecontemporaneous dolomite as single factors, we studied the lithofacies palaeogeography in Ma541 Submember.The results show that Ma541 is generally a set of sedimentation from supratidal limited evaporation environment and in the period of sea level decline with shallow water. The sedimentary microfacies are mainly composed of gypsum-bearing dolomitic flat and gypsum dolomitic flat ,dolomitic gypsum flat comes second. We combined the areas regional geological background with lithofacies palaeogeography to construct the limited evaporation tidal flat sedimentation maps of Ma541 Submember. Meanwhile,the control of reservoirs was studied. We thought that gypsum-bearing dolomitic flats and dolomitic flats provide a foundation for the development of large-area reservoirs.