bluuebunny/crossref_metadata_2025 huggingface dataset:
Investigation into the Reactivity Behavior of CaSO4 with Coal Chars in the Chemical Looping Combustion System
Authors: Tian Hong Jing , Chang Jing , Guo Qing Jie
Published: August 2013

Chemical-looping combustion is a promising method to realize the near zero emissions of CO2 without any excessive energy penalty. In this paper the reactivity behavior of calcium sulfate (CaSO4) as oxygen carrier (OC) with coal chars are investigated. After the impregnation of nickel ions or iron ions, the reacting behaviors of the OC are remarkably promoted comparing with that before the impregnation. The high impregnation of nickel ions or iron ions is beneficial to the reactivity of the OC, especially in the first half of the reaction. After the reaction of fresh CaSO4 with coal chars, the solid products are merely CaS. In addition, the solid products of Ni-impregnated OC consist mainly of CaS, CaO and Ni3S2 while the solid products of Fe-impregnated OC are composed of Fe3O4 and CaS.
A Photovoltaic and Commercial Power Complementary Hybrid System for University Classroom Energy-Saving Lighting
Authors: Wang Yi Wang
Published: August 2013

A novel distributed photovoltaic power generation and commercial power complementary hybrid power supply system was designed and developed, and the proposed system applied to the lighting power supply system used in university classroom energy-saving lighting. Combined with intelligent control technologies, to realize the classroom energy-saving and LED efficient lighting, effectively reduce the lighting energy consumption in university campus. The proposed system can ensure efficient and reliable power supply for classroom lighting applications.The designed and developed experimental system verified the feasibility, reliability and superiority of the proposed system.
Research and Application of Floaters Produced from Water Treatment in Oilfield SZ36-1 as Profile Control Agent
Authors: Niu Li Wei , Lu Xiang Guo , Li Wei , Yuan Sheng Wang
Published: August 2013

Composition and structural characteristics of floaters were detected and forming reasons were analysed through modern reservoir engineering theory, equipment analysis and physical simulation.Experiments on flowing characteristics, fluid diversion effect and driving effect were carried out. The results show that floaters are formed by huge amounts of tiny bubble absorbing crude oil and suspended solids in floating progress which make their density lower than water. Disposed floaters have better adaptability and can block off high-permeability. Furthermore, profile control effect turns better as particle concentration and permeability ratio increases. However,floater particles have selectivity to permeability ratio. When permeability ratio is not less than 8, profile control agent may damage low-permeability layers and cause succeeding water passing through high-permeability layers. Therefore, only when floaters adapt well to permeability ratio can we get better profile control effect.
Study on Measurement and Simplified Model of Burning Rate of AP/HTPB Base Bleed Propellant under High Pressure
Authors: Shen Hui , Yu Yong Gang
Published: August 2013

In order to understand the burning rate of AP/HTPB propellant of the base bleed unit, the p-t curves of combustion of AP/HTPB base bleed propellant are measured in the closed bomb. The burning rate formula of the propellant under 50-200MPa is obtained by fitting to the experimental results. Based on division zone combustion theory, a simplified model of the burning rate of AP/HTPB base bleed propellant under high pressure is established. The calculation results and the experimental results are in good agreement.
Experimental Study on Catalytic Combustion Parameters of Gasoline Vapor in Oxygen-Poor Condition
Authors: Liang Jian Jun , Du Yang , Ou Yi Hong , Wang Pei Wen , Qian Hai Bing , Jiang Xin Sheng
Published: August 2013

This paper studied gasoline vapor combustion catalyzed by Pd/Al2O3 in oxygen-poor condition. By adjusting the gasoline vapor and oxygen, the inlet temperature and flow rate, collecting data of temperature difference between outlet and inlet as well as the change of gas mixture, the study analyzed the various factors in the catalytic combustion process, and optimized the process control parameters. The results indicated that catalytic combustion was more efficient at the ignition temperature of 274 °C, burned 50% of gasoline vapor in oxygen-poor condition (O2 fraction was 12%).
A Study of the Reliable Receivers for Dish/Stirling Solar Electric Generating System
Authors: Zhou Jian Ming , Pan Wei Ming , Yang Geer , Liang Wei Qing , Liu Jiang Lin , Zhou Sheng
Published: August 2013

A new direct illuminated receiver (DIR) for Dish/Stirling system was introduced in this study. The new cavity receiver was designed to help avoid the ruptures of the heater-head result from nonuniformities of temperature distribution. A method was also proposed to optimize the design of DIR. Both the efficiency and the reliability were improved as using this method in the experiment. The power output of the electric generating system was increased by around 300W. The new DIR operates safely at 900°C-1000°C, and cannot be sensitive to a short-lived cloud.
A Performance Study of Coke Oven Gas Vehicle
Authors: He Feng , Li Yi Ming , Wu Hai Bo , Li Huan
Published: August 2013

The coke oven gas vehicle is a type of clean energy vehicle. The composition and the physicochemical properties of COG are analyzed. Acceleration, emission, fuel economy and safety performances are studied. Compared with conventional vehicles and other alternative fuel vehicles, COG vehicle meets the requirements of acceleration performance and are better on emission, safety and fuel economy performances.
Index System Construction and Research of Inexact Influence Analysis Model of Energy Risk System
Authors: Wang Mo Yu , Wang Yan Yan , Bai Bing Jie , Shen Xiao Liu
Published: August 2013

With the growing tension of the energy resources, energy risk has become the core of common concern. In this paper, the definition and the cause of energy risk analysis, combined with the analytic hierarchy process (AHP) construct the comprehensive risk-based energy industry index system. According to the viewpoint of information theory, the entropy method to calculate the objective factors, to measure the information content of the Beijing Energy Risk indicators inexact. By visual comparison of each indicator entropy, research the impact of various indicators of system.
Investigations of Energy Separation Effect in Vortex Tube for Different Gases
Authors: Wang Wen Chuan , Fang Xiang Jun , Sun Wen Long , Eri Qi Tai , Liu Shi Long
Published: August 2013

The paper aims to investigate the energy separation effect of gases such as natural gas to vortex tube. Energy separation phenomena of different gases were investigated by means of three-dimensional Computational Fluid Dynamics (CFD) method. Flow fields of natural gas, air, nitrogen, et al were simulated. The main factors that affect the energy separation were found. With cold mass fraction being 0.7 and pressure drop ratio being 3.90, the results show the effect can be divided into three intervals in terms of the freedom degrees. The first interval is filled with monatomic gas at 50°C to 60°C; the second diatomic gas at40°C to 50°C; and the third polyatomic gas at 0°C to 40°C. In monatomic gas and diatomic gas, the smaller the gas specific heat capacity is, the better effect will be. However, in polyatomic gas, bigger specific heat capacity ensures better energy separation.
Process Analysis of Ocean Thermal Energy Used for Desalination
Authors: Jin Zhi Jiang , Wang Hao
Published: August 2013

Ocean thermal energy (OTE) is a kind of ocean energy with a large development potential. In this paper, a new method making direct use of OTE for desalination was put forward and its principles and working process were also expounded. Firstly, this paper established the relevant process model of OTE desalination system. The system used OTE to maintain a vacuum and seawater could be evaporated at a much lower temperature and with less energy than conventional technique. Secondly, a parametric study was carried out quantitatively. It analyzed the influence on the system’s operation of three main parameters (temperature, mass flow and energy consumption). Finally, this paper improved the energy efficiency of the system. The lowest unit energy consumption could reach 4.54kWh/m3. The results indicate the feasibility of OTE used for desalination and its competitiveness against common solar desalination method.
Research on the Wear Characteristics of Injection Pump in Di-Engine Fueled with Dimethyl Ether
Authors: Li Wei , Li Fan Bin , Wang Wen
Published: August 2013

Fuel injection pumps of Diesel engine are lubricated primarily by the fuel itself, so the fuel should have lubricity. It has been proved that diesel engine has some extraordinary virtues when fueled with dimethyl ether (DME), but the precision pairs (plunger and needle valve pairs) of the fuel system will wear badly when pure DME is used. As well known, some vegetable oil contains fatty acid, which possess polar-headed and long straight chain in molecular, so vegetable oils should be good boundary lubrication additives. In this paper, the lubricity of pure DME and DME added with castor oil and rap oil as lubrication additive were detected. The endurance test for each kind of fuel was carried out for 160 hours. The results show that, By adding 2% castor oil or 6% rap oil into DME, the surface of plunger is no obvious wear,the maximum supply pressure of pump declines less than 6 MPa and 3MPa correspondingly, the decompression time of delivery valve decrease less than 10 seconds and 5 seconds respectively. The results demonstrate that the lubrication performance of dimethyl ether will be improved greatly by adding right amount of certain vegetable oil.
Simulation of Chemical Looping Hydrogen Production Using Solid Fuel
Authors: Wang Long Fei , Wang Shu Zhong , Luo Ming
Published: August 2013

Chemical looping hydrogen production (CLH) has become a promising technology for hydrogen production with inherent separation of carbon dioxide. This paper simulated the three reactors of CLH process of coal as solid fuel using Aspen Plus. The effects of temperature, oxygen carrier/coal ratio, steam/coal ratio, and the air/coal ratio on the gas composition in specific reactor were discussed. Simulation results showed that the temperature had a great effect on the reactor performance. The optimized OC/coal ratio in the OC/coal ratio in this paper was 19.1. The CO2 fraction in the flue gas of FR reached 87.5% when the vapor was condensed at the temperature of 950 °C. The fraction of dry-based H2 in the SR was almost 100% when the SR temperature was 815 °C and the steam/coal ratio was 18.8. The simulation confirmed that the CLH process showed high potential in hydrogen production and the carbon capture.
Study on Diesel Combustion Dust with ASE and HPLC
Authors: Liu Shu Jun , Xu Hao Nan , Feng Kun , Wang Ying
Published: August 2013

Diesel combustion dust was analyzed by accelerated solvent extraction-high performance liquid chromatography (ASE-HPLC) in this article. The optimum extraction conditions was that N-hexane was the optimum extraction solvent, extraction time was 30min, temperature was 140°C and the pressure was 120Mpa. it could be a promising technique for the confirmation of the diesel combustion dusts.
Corrosion Mechanism of 316L Stainless Steel in a Expansion Joint of Blast Furnace Gas Pipeline in a Power Plant
Authors: Jin Zhi Hao , Ge Hong Hua , Zong Yang Wei , Yang Fa Yun
Published: August 2013

Severe corrosion phenomenon appeared in an expansion joint of blast furnace gas (BFG) pipeline after booster fan in a power plant. The sediment adhered to the inner wall of the expansion joint was analyzed by ion chromatography. The corrosion site of expansion joint was examined by scanning electron microscope (SEM), and the behavior of electrochemical corrosion of stainless steel electrode was discussed through electrochemical impedance spectroscopy (EIS) and polarization curve. The results reveal that the leaching solution of the sediment is a kind of strong electrolyte solution. Along with the increase of immersion period, the impedance of stainless steel electrode decreases dramatically, the impedance spectroscopy experiences such a procedure that a single capacitive reactance arc gradually develops into the contraction of inductive reactance and then tends to be two capacitive reactance arc, which indicates that pitting corrosion transfers from induction period to evolution period until metastable pitting translates into stable pitting. There exists no passive area in polarization curves of stainless steel and shows the characteristics of active dissolution. In conclusion, the failure of the expansion joint stainless steel shows typical pitting characteristic.
Asymmetric Voltage Sag Control Strategy for Grid-Connected PV System Based on PIR Controller
Authors: Zheng Fei , Zhang Xiao Lin , Ding Ming Chang
Published: August 2013

This paper proposes an improved LVRT control strategy based on PIR controller for grid-connected photovoltaic system under asymmetric voltage sag fault. First, the PIR current controller is designed in the positive synchronous frame without the need to decompose the positive and negative sequence components and the dynamic adjustment method for the current-reference calculation is given in order to gain a constant active power. And then, the principle how control strategies switching between the one in normal state and the other one in fault state is revealed in detail. Finally, simulations and experiment test on a 500kVA grid-connected photovoltaic inverter verify that this control strategy achieves good dynamic performance and it improves the PV inverters’ capacity of riding through asymmetric voltage sag fault effectively.
Effect of Different Biofouling Characteristics on Heat Transfer of the Heat Exchanger
Authors: Wang Da Cheng , Qian Cai Fu , Cao Sheng Xian , Liu Yang , Sun Jia Wei
Published: August 2013

This study, conducted with the dynamic simulation equipment under constant conditions of water temperature 30°C and flow rate 0.4 m.s-1, is intended to simulate dynamically the fouling process on stainless steel tube heat exchanger of three types of fouling microorganisms, iron bacteria (IB), sulfate-reducing bacteria (SRB) and slime forming bacteria (HB), which are isolated from the slime in the bottom of circulating cooling tower. This experiment was tested through the on-line monitoring of fouling resistant and analysis of the characteristics of heat transfer ,the results indicate that induction period for the formation of biofouling in the stainless steel tube by slime-forming bacteria is 56 h, Iron bacteria is 25h, and sulfate-reducing bacteria is 22h. Among these bacteria, the greatest impact on the heat transfer is taken by the iron bacteria, and the sulfate-reducing bacteria are next.
Hazard of Coal Mine Gas and its Preventive Measures
Authors: Yu Zuo Jiao , Jiang Fu Chuan , Mao Xiao Xin , Wang Ju
Published: August 2013

The coal mine gas hazards as important factors affecting the coal mine production safety and it is the modern ore mining industry must be rigorous treatment of serious harm. This paper expounds the harm of coal mine gas,and analyzes the cause of it,then puts forward some prevention measures for it.
Investigations of Energy Separation Effect in Vortex Tube for Real Gases
Authors: Tang Jing , Wang Wen Chuan , Fang Xiang Jun , Liu Shi Long , Sun Wen Long
Published: August 2013

This paper aims to investigate real gases energy separation effect such as real natural gas, CH4 and C2H4 in vortex tube. Energy separation phenomena of real natural gas (RNG) were investigated by means of three-dimensional Computational Fluid Dynamics (CFD) method. Flow fields of ideal natural gas (ING), or RNG in low and high pressure were simulated. The results main factors were found that affect the separation effect. At the same time, this paper has illustrated the effect and tendency of energy separation with real gas in the tube under the same cold mass fraction and pressure ratio. The results show low pressure ideal gas and real gas energy separation effect difference about 3-4°C, the real gas effect is not obvious; High pressure real natural gas (HPRNG) and ideal gas (HPING) effect difference is 13-14°C, the real gas effect is obvious; CH4 (LRCH4) and C2H4 (HRC2H4) energy separation effect is obvious and effect of real gas is generated.
A Research on Compressed Natural Gas Engine Fuel Supply System for Rapid Prototyping Based on AMEsim
Authors: Chen De Gang , Sun Ren Yun , Wu Yu Dong , Wang Bo
Published: August 2013

AMESim model is on the basis of particular model gas engine fuel supply system. Elaborated the model in detail and made static and dynamic simulation. The static and dynamic characteristics curves of this system is got. Several important ideal structural parameters of this system were obtained. The results can be used for a theoretical basis for rapid prototyping and system structure optimization.
Analysis and Research on Fire Risk of Electric Vehicle Charging and Swapping Station
Authors: Wang Shu Ping , Li Wei , Fan Ming Hao , Wu Hai Cheng , Wang Hai Chao
Published: August 2013

According to the characteristics of cable and decoration materials, the typical fire scenes were built using the method of FDS large eddy simulation (LES)). The smoke movement, temperature change, visibility and CO distribution of different fire scenes were studied. The fire spreading and risk when the fire occurs in electric vehicle charging and swapping station (EVCSS) were analyzed, which provides an important technological support for effectively preventing fire and guiding evacuation in EVCSS.
Optimal Planning of Electric Vehicle Charging Stations Location Based on Hybrid Particle Swarm Optimization
Authors: Tang Zhe Ci , Guo Chun Lin , Hou Peng Xin , Fan Yu Bo , Jia Dong Ming
Published: August 2013

In order to determine the layout of electric car charging stations, a model for optimizing charging stations location is developed after charging-demand districts are divided, the number of electric vehicles and the center of each charging district are ready. This model takes the minimization of electric vehicles charging stations total cost which includes initial fixed investment costs, operating costs and charging costs as the objective function, some related constraints which include service radius, capacity of charging station etc. are considered. Particle swarm optimization based on hybridization is proposed to solve this problem. The example verifies feasibility of this method.
Power Generation System by Vehicle on the Downhill of Expressway
Authors: Zeng Xian Tao , Ren Qian Hua
Published: August 2013

In this paper, a method of magnetoelectricity power generation system for vehicle on the downhill of expressways is proposed. This system is a clean energy system that can be reused. Its structure includes car magnetic poles, magnetic poles imbedded in road surface, closed circuit imbedded in road surface, rectifier, inverter and storage battery. Multi-unit magnetic poles and closed circuits imbedded in the road surface are used in this invention, so when the car poles move with the running down of cars on downhill, magnetic flow in closed circuits will change to produce a technique of group control power generation. From the simulated system in the test, it can be seen that it is efficient and effective in generating power.
Safety Research and Lightweight Design of Electric Vehicle Battery Protection Device
Authors: Zhao Gui Fan , Liu Ming Min , Li Yan
Published: August 2013

Applied to an electric car, the battery frame structure was designed for the storage batteries of electric vehicles under the test conditions in accordance with the GB11551-2003 regulations, and the crashworthiness finite element analysis was conducted with ANSYS/LA-DYNA through which the deformation of the battery frame is observed. Under the premise of ensuring the storage battery is not disconnected from the shackles and fled into the crew cabin, the structure is optimized, and safety of the battery protection device is evaluated. Combining with the safety test program and finishing lightweight optimization design.
Design and Implementation of a High Power Battery Charger of a Hydroelectric-Connected PV Plant
Authors: Ju Chang Bin , Wang Huan , Feng Wei , Xu Hong Hua
Published: August 2013

In remote areas, the scheme of networking grid complementarily by the large capacity ofPV plants and the hydropower units becomes an important choice. After analyzing the design of ahydroelectric-connected PV plants, this paper presents a detailed requirement of a large capacitybattery charger. The Buck circuit topology is adopted as the topology of the battery charger satisfyingthe demand the high charging efficiency and reliability and a 3 phase phase-shifted interleavingtopology is adopted to resolve the problem of high power application. Finally a double-loop controlstrategy was designed for implementing the batteries three-stage charging control and PV MPPTfunction. A 150kW battery charger is developed and used in PV plant of the Yushu, Qinghai province,China. The experimental data acquired form
Study on Zn-PANi Battery Characteristics Used for Electric Vehicles
Authors: Cui Sheng Min , Lu Yuan , Song Jin Ping , Wang Jian Feng , Ding Wen Feng
Published: August 2013

To study Zn-PANi (polyaniline) battery dynamic characteristics a vehicle power supply based on miniature electric vehicles was designed. And the power battery dynamic test cycle was determined according to the vehicle test cycle prescribed under GB using Land battery testing system. The power battery steady characteristics tests include battery voltage test, per gram capacity test, self-discharge rate test, open circuit voltage and impedance test, cycle life test and short circuit test. Battery discharge characteristics include the relationship between discharge voltage and time, DOD(depth of discharge), the relationship between open circuit voltage, impedance and SOC in different discharge currents. Rationalization proposals in using Zn-PANi batteries efficiently by analyzing battery characteristics, advantages and disadvantages as power batteries are put forward.
A New Power Allocation Strategy of Supercapacitor/Battery Hybrid Energy Storage System for Electric Vehicles
Authors: Fan Yu , Zhang Li , Wang Kai
Published: August 2013

This paper presents a new power allocation method in the electrical hybrid energy storage system composed by batteries and supercapacitors (SCs) for electric vehicles (EVs). Based on the speed of EVs, the new power sharing strategy, adapted to different kinds of load profiles, regulates the SC state of charge (SOC). By comparison, the new strategy showed the shortest accelerating time and least power losses, which can efficiently improve dynamic performance and energy utilization rate.
Application and Control of Brushless DC Motor for Electric Vehicle
Authors: Wang Da Fang , Bu De Ming , Zhu Cheng , Zhou Chuan Wei
Published: August 2013

Brushless DC motor has simple structure, great power density, torque output and high efficiency. It has a broad application prospect for electric vehicle. The conventional scheme of BLDCM drive system adopts motor ontology, power drive circuits and position sensor. BLDCM is usually used with the mode of 3-phase 6-state PWM. Due to its structure and commutation strategy, it has many problems to be solved if works on electric vehicle. The basic operating principle of Brushless DC motor and the basic power drive system was discussed. In addition, investigated the torque ripple, flux-weakening speed control and brake energy regeneration for electric vehicle. Solving these problems can promote BLDCM and electric vehicle industry.
Bond Graph Modeling and Analysis of HEV System Based on Ravigneaux Planetary Mechanism
Authors: Xi Li He , Chen Hong Wei , Zhang Xin
Published: August 2013

The bond graph method is used to analyse and model dynamics of hybrid electric system based on Ravigneaux Planetary Mechanism. Bond graph models are built in different structural form, general equations of torque and speed are derived, and operating modes achieved in different structural form are in consideration. At the same time, requirements of control system in different operating modes are illustrated and analysed, which help lay the foundations for modeling and simulation of HEV system based on Ravigneaux Planetary Mechanism.
Experimental Research on the Effect of Excess Air Ratio on Turbocharged Lean-Burned CNG Engine
Authors: Pang Jian Xi , Qu Da Wei , Lu Xiao , Liu Guang Yang
Published: August 2013

Experimental research on the effect of excess air ratio on dynamic and emission performance of turbocharged lean-burned CNG engine. The 12 test conditions contain engine speeds of 1300r/min, 1600r/min, and 1900r/min, with 25%, 50%, 75%, 100% load separately. When keeping other combustion boundary conditions unchanged, the excess air ratio has little effect on engine output torque at almost all test conditions, but has obvious effect on CH4 and NOx emission. With the excess air ratio increasing, the emission of CH4 has increased while the NOx emission has decreased significantly. When the λ value is in the range of 1.4-1.45, the emission level is lower.
The Design of APU(Auxiliary Power Unit) Control Strategy
Authors: Chen Ling Shan , Huang Xiang Er , Gan Pin , Cheng Wei
Published: August 2013

APU(Auxiliary Power Unit) control strategy was designed by the target of actual output power following the demanded power and the fuel consumption minimum. The preset demanded power of the entire vehicle has been decoupling controlled, using PID control algorithm to control the speed of the engine and vector control algorithm to control torque of generator, to realize decoupling control of the demanded power. Simulation result and bench test verified control strategy and achieved the goal of vehicle fuel saving 20% by nine “NEDC” cycles.
Thinking and Suggestions to the Competitiveness of New Energy Vehicle in China
Authors: Zhang Jing , Hu Fei
Published: August 2013

The research and industrialized development of new energy vehicle is drawing more and more attention from a point of view in the scope of the world. This article, based on actual situation of new energy vehicle development in China, applying SWOT analysis to analyze the strengths, weakness, opportunities and threats of new energy vehicle industry. Finally, it makes recommendations to enhance the competitiveness for the new energy automotive industry.
Incorporate Design of SWH System with High-Rise Residential Building in Northern Guangxi Province - Principle of Design and Calculation
Authors: Chen Ji Ming , Wei Yi , Xu Da Qing
Published: August 2013

The SWH system, which refers to solar water heating system, is getting popular in recent years. Despite the wide range of application, the incorporate design of SWH system with high-rise residential building stays problematic due to the lack of comprehensive design and calculation system, there is much to be improved in terms of programming, system and parameter selection, calculation system and the management of the SWH system. This paper mainly discusses the principle of design and calculation of SWH system, a real high-rise residential building project in the city of Guilin is set as an example .With the help of it, the design of SWH system in the stage of blueprint, the selection of hot water system and climate data, the calculation method of SWH system, and the importance and necessity of using monthly-based data to design the SWH system will be elaborated in detail. This paper also expects to be helpful to the construction of other SWH projects in China.
Energy Consumption Simulation of the Air Conditioning System in Large-Scale Buildings
Authors: Zhang Guang Ming , Shen Xue , Tang Gui Zhong
Published: August 2013

The working environment of air conditioning system in large-scale building is very complex, and there is no significant linear relationship between factors affecting energy consumption and energy demand of air conditioning system. This study adopts a nonlinear regression model: ANN (artificial neural network) model as energy model of air conditioning system. Take outdoor temperature, categorical day-of-week variable, equipment efficiency and terminal load as input, energy demand as output. Use energy consumption data in 2011 for network training, and energy consumption data in 2012 to verify the reliability of model. Based on energy analysis, the operation condition and the characteristics of energy consumption of air conditioning system for large-scale buildings in Nanjing could be precisely represented.
Experimental Research of Arrangement Method of Prestressed Concrete Slab with Unbonded Reinforcement
Authors: Pang Ping , Yin Xin Sheng
Published: August 2013

In practical projects, prestressed reinforcement are arranged in concrete slab uniformly. According to the research, a new arrangement method of prestressed concrete slab is provided. This article discussed unbonded prestressed concrete slab system, and gives the theoretical calculation method. It can save more than 50% quantities of reinforcement, and has economic advantages than before.
New Type of High-Strength Support in Deep Soft Rock Roadway
Authors: Feng Ji Cheng , Li Hong Jiao , Zhao Zhi Chao , Zhang Wen Long
Published: August 2013

In order to control the deformation of large section surrounding rock in 700m level of the main drainage pumping station in the experimental mine, according to the reason for deformation and failure of the main drainage pumping station and material mechanics, fully-closed U-shaped support which used double welding I-steel bottom arch as the main structure was designed and the assembly and principles of support were described in detail, based on theoretical calculation and comparative analysis on the structure and mechanical properties of rectangular I-beam support, U-steel support, single I-beam arch support and double I-beam arch support. Based on the comparative analysis by numerical simulation, the rationality of the high strength support and the detailed support parameters were determined. It gets good effect in field application and ensures the long-term stability of the main drainage pumping station. The results show that: the double-layer I-beam 12# can increase bending strength by about 7.5 times. Double trough splint device used in shoulder of the support has the advantages of high strength, greater rigidity, good pliability and stable working resistance.
Rebounding Method Application of Structure Concrete Compression Strength Detecting in Datong Area
Authors: Liu Gui Ling , Gao Feng
Published: August 2013

On the basis of the national curve of rebounding method, the rebounding non-destruction detecting testing method for concrete compression strength was done by using the engineering example. And the rebounding testing results were compared with the results from the core drilling method for concrete compression strength. It indicated that using the national curve of rebounding method to infer the structure concrete strength of Datong area was feasible, but the inferential strength value was higher than its actual value.
Reflection upon Energy Saving and Emission Reduction in Colleges in the Context of Low-Carbon City Construction
Authors: Fen Hu Hui
Published: August 2013

With high frequency of damaging climate and in the context of low-carbon city construction, colleges and universities should actively advocate energy saving and emission reduction for the construction of a low-carbon and green campus. This paper, by conducting survey into the current situation of energy saving and emission reduction in colleges and universities as well as what Zhejiang Shuren University has achieved in this field, points out that measures such as enhancing promotion, employing new technologies, perfecting system and making more investment should be taken to contribute to the construction of low-carbon city.
Study on Water Stability of Granite Asphalt Mixture
Authors: Guo De Dong
Published: August 2013

To make effective use of the granite aggregate resource, and improve the road properties of the granite-asphalt pavement. Firstly, technical properties of various kinds of granite aggregate were tested; Secondly, conduct the mixture design of asphalt concrete with different fine aggregate and stripping resistant admixture and checking the road performance. Thirdly, the asphalt concrete water stability of different kinds of granite was analyzed with the normal water stability method and Hamburg rutting test. The results showed that granite aggregate has the advantages of high strength and abrasion performance; water stability of granite asphalt mixture can be improved effectively by using limestone fine aggregate; adding hydrated lime or cement can significantly improve the water stability performance of granite asphalt mixture, lime hydrate having the optimal improving effect.
Studying on Optimum Insulation Thickness of External Wall for Existing Residential Building Energy Saving Reform in Severe Cold Area
Authors: Yao Lei , Jiang Shu Guang
Published: August 2013

External wall exterior insulation technology is one of the most common energy-saving measures in the existing residential building energy saving reform, after confirming the energy-saving standards, how to choose the optimum insulation thickness to make it the lowest cost of renovation in the life cycle is of great significance. Taking a dormitory building in Shihezi area as an object, we developed the mathematic model based on life cycle analysis for calculating the optimum insulation thickness. Finally we simulated the building with DeST-h and analyzed the economic.
The Analyses of Daylighting in High-Rise Office Buildings and the Design Essentials
Authors: Huang Hai Jing , Wu Hao Qi
Published: August 2013

Majority of office buildings in China are appeared in forms of high-rise buildings and have a character of high construction-scale and high energy-cost. The daylighting in office can not only save the energy, but also meet the physical and psychological needs for eyes, and finally lead to higher work efficiency. Solving the daylighting problems in the high-rise office buildings is urgent. The core position in the high-rise building is an important factor to affect the light in office. In this paper, the author analyses the lighting characteristics of three types of the core position, which is core in the center of the building, core at the peripheral of the building and the core separated from the building. Combined with the natural lighting assistance measures, some design essentials were raised in this paper.
The Green Energy-Saving Design of Stadium
Authors: Chen Xiao Jie
Published: August 2013

According to the principles that green sports building should follow are reducing environmental load and the amount of the utilized resource and energy. It emphasizes harmoniousness of architecture and environment. Started with green buildings concept, the necessity for developing green building is analyzed and its design rules are summarized. On the basis of that, the architecture of green sports building technology is presented according to the design idea of sports building and green building,. And sustainable utilization of green sports building is explored on resource, environment, energy-saving, after-use and so on. Then green design for manufacturing is referred to. Based on life cycle, green design for sports building is pointed out. At last, by using Analytic Hierarchy Process (AHP) method, assessment model is built and environmental performance in design phase of green sports building is assessed.
The Guiding System Design of Medical Architectural Interior Space Take the Third People's Hospital of Nantong for Instance
Authors: Zhao Jin
Published: August 2013

taking comprehensive medical building in the third people's hospital of Nantong as an example, the paper mainly discusses the role of the guiding system design of interior design in hospital construction. Comprehensive medical building puts different relevant medical works together in the same building, makes its volume bigger and its streamline complex. By taking intelligentized recognition guiding system, light guiding system, color guiding system, graphics guiding system and other measures, the building reasonable plans streamline to guide patients and create a comfortable, convenient medical space.
The Research of Mixture Ratio Factors on the Concrete Consumption Norm
Authors: Zhou Ming Ru , Li Zheng Bo , Shen Qiong Fei , Guo Zhong Yu
Published: August 2013

Concrete valuation work is mainly on the composition of concrete raw material pricing, different concrete mixture ratio has decisive influence on the valuation. Concrete mix is influenced by many parameters, such as water-binder ratio, sand percentage, unit water and so on. The mixture ratio is the purpose to research the inner relationship between concrete parameters.In the preparation of the consumption of the concrete norm, analysis to the reasonable mix can not only make valuation work accords with the specification requirements, but meet the practice.
Ultrasonic Non-Destruction Detecting Method for Concrete Compression Strength
Authors: Gao Feng , Liu Gui Ling , Huang Qing Guo
Published: August 2013

Regional materials and mixing ratio of Datong area are used to make the concrete testing blocks. The rebounding and ultrasonic non-destruction detecting testing for concrete strength were done by using the six types of strength grades concrete standard specimens according to the technical regulation. On the basis of regression analysis with least squares technique, the mathematical models between rebounding values, ultrasonic velocity values, rebounding-ultrasonic method values and concrete compression strength were set up by three kinds of functions’ regression analysis. The error analysis showed that the rebounding-ultrasonic non-destruction detecting testing method has higher precision results and the practical value.
An Intelligent Controlled External Shutter for Building Shading
Authors: Zhang Ke Wei , Guo Peng Wei
Published: August 2013

As an external shading facility for buildings, a new energy-saving external shutter is presented, which is intelligently controlled and without external power supply. The slats are driven by a motor which is powered by the third generation thin-film solar cells. The signals, which are measured by wind, light, rain and temperature sensors, are processed by a microcontroller system controlling the motor. According to a quick-response and high-efficiency control strategy, the movement of shutter is regulated to achieve the most comfortable indoor environment.
Experimental Research on a Novel Solar Water Heating System by Using Loop Heat Pipe
Authors: Wang Zhang Yuan , Zhang Xiang Mei , Yang Wan Sheng , Chen Zhi Wu
Published: August 2013

In this paper, a novel solar water heating system will be proposed by applying the loop heat pipe to a conventional split solar hot water system, which will have the characteristics of high efficiency, low cost, appearance appealing and building integration. Three types of the system, i.e., the system with evacuated tubes, with single flat-plate glazing cover, and without glazing, will be experimentally investigated and compared on the influence to the dynamic performance of the system. It was found that the system’s operating temperature increased significantly during the start-up stage and gently after until reach relatively constant. The instantaneous efficiency was found to be fluctuated, although it reached stable eventually during the operations for all three types. By using the moving average calculating method, every 10 minutes were applied for the calculation of the average efficiency which had a negative linear relation with the combined factor of (Tmean-Tamb)/I. In general, the solar system with evacuated tubes performed the best with the highest water temperature output, highest system efficiency and lowest heat loss coefficient among the three systems.
Daylight Factor for Energy Saving in Retrofitting Institutional Building
Authors: Zakaria Rozana , Amirazar Armin , Mustaffar Mushairry , Mohammad Zin Rosli , Abd Majid Muhd Zaimi
Published: August 2013

In Malaysia, lighting is the second electric power consumption after air conditioning and it is increasing every year. Most of the lighting design standard for building in Malaysia is based on MS1525, and this being taken without further measure on daylight consideration. Movement from inefficient and unsustainable energy practice to more energy efficient initiatives is vital for building. Universiti Teknologi Malaysia as one of the major institutional building is consuming 9 to 16 million kWh per year. Thus, about 20% of energy consumed was from artificial lighting. This paper aim to highlights the cost benefit study of lighting retrofit, which integrates the utilization of daylight into existing building. Data for this study was obtained through illumination in-situ measurement on two types of artificial lighting with the inclusive of day lighting before and after lighting retrofit. The measurement was conducted in a typical building in Block C09 of Universiti Teknologi Malaysia (UTM). Annual saving and payback period were analysed from the collected data. It is estimated that total energy consumption decreasing around 47.7% over a year from 84,232kWh to 44,014kWh by retrofitted the fluorescent T8, 36W with fluorescent T5, 25W. The estimated total annual electricity bill saving is at RM11,073 (USD3500.00). The return in retrofitting cost is at 2.5 years payback period. The payback analysis portray that lighting design is best integrated with daylight. The significant amount of saving in energy consumption and the cost of retrofit is obtained by integrating daylight as a source of lighting for interior space.
Integrated Application of Marine Geophysical Technology in a Seawall Reinforcement Project
Authors: Dai Yan Chen
Published: August 2013

Due to high risk and large investment of marine project, it is essential to obtain detailed seabed formation to support designing work, which is difficult to achieve just using traditional investigating method such as drilling. Based on such geophysical methods as water-depth measurement, side-scan sonar and acoustic shallow stratigraphic profiling, under the aegis of drilling work, the paper provides a comprehensive method to investigate seabed topography, locate embedded objects and identify adverse geological phenomena, which is directive to future study on integrated application of geophysical method to marine project.
Life Cycle Assessment for Building Envelope
Authors: Bao Dong Jie , Zhang Wen Xia , Yang Jiang Bo
Published: August 2013

The method of Life Cycle Assessment is used to assess environment impact of building envelope in its life cycle in this paper, in order to achieve the purpose of providing reference for selecting optimal envelope and reducing the environment impact caused by envelope.
New Type Rural Residence Energy-Saving Effect Analysis in Northeast China
Authors: Sun Qing , Gao Li Na , Piao Zai Lin , Gu Shi Yan
Published: August 2013

Building energy efficiency is a current research focus. This paper combined actual testing and software simulation to studies the new type rural residential in Chaoyang, study its effect on the indoor thermal environment and energy saving effect. The results showed that the new type rural residential indoor air temperature significantly lower than ordinary one in both vertical and horizontal directions, indoor thermal environment has markedly improved, and heat load indicators reduced significantly, energy-saving rate up to 66.41%, achieved the dual effect of improving indoor thermal environment and energy efficiency.
On the Preparation and Properties of Luminous Concrete
Authors: Zhao Su , Li Ya Qing , Wang Qian
Published: August 2013

The luminous concrete was made by doping phosphors into the raw concrete materials. The CaO (xDy3+, yNa+ series) phosphors were compounded by high temperature solid state method. Florescent powder phase, excitation and emission spectra were analyzed. The results show that the peak of florescent powder emission spectrum locates at 480nm or so, corresponds the transition 4F9 /26H15 /2 of Dy3+. There are a series of lines in the range of 240-420nm by monitoring the excitation spectrum of 480nm emission. Strong excitation peaks are at 360nm and 375nm. Influences of doped phosphors on concrete mechanical properties were studied. The results show that with the growth of phosphor dosage, concrete compressive strength and flexural strength decrease. SEM images show that the fluorescent powder particle is approximately spherical, and uniformly mixed in concrete.
Primary Research about Energy Consumption Analysis and Optimization Strategy of Office Buildings
Authors: Zou Hui Fen , Fei Ying Chao , Cao Xiao Zhen , Ye Sheng
Published: August 2013

Based on the energy saving reconstruction of an existing office building in Hangzhou, this paper analysis the building energy consumption through the DEST simulation at the present phase. Then summarize the deficiency and reconstruction of the building, and accordingly we propose a reconstruction scheme for the building which is based on the primary research about the optimization strategy of energy saving. This will provide a strong basis about the energy saving reconstruction direction and the reconstruction emphasis of the office building in hot summer and cold winter area.
Research on Key Prestress Construction Techniques of Continuous Box Girder
Authors: Mo You , Huang Xian Bing , Zeng Yu Sheng , Chen Feng Hui , He Hong Wei , Xiao Lian , Shu Xian Jun
Published: August 2013

The cast-in-place prestressed concrete continuous box girder is commonly used in the place where the structures are needed to be subjected to long span, heavy loads and complex curves, et al. Combined the prestress theory with engineering practice, this paper focuses on the theoretical elongation and tension of the prestress steel strand and accident prevention and treatment and other key technologies with “dual control” theory to guide on-site construction and with comprehensive ways to verify the theoretical elongation. The prestress concrete construction of Shoujiang Bridge continuous box girder shows that the prestress construction techniques were strictly controlled to ensure the continuous box girder completed and to meet the requirements of the design and specification.
Rigid Polyurethane Foam Based on Modified Soybean Oil
Authors: Ji Dong , Fang Zheng , Wan Zhi Dong , Chen Hai Chao , He Wei , Li Xiao Lin , Guo Kai
Published: August 2013

Two bio-based polyols (Polyol-r and Polyol-t) were synthesized from commercially available epoxidized soybean oil (ESBO). Polyol-r was obtained from ring opening of ESBO in the presence of fluoboric acid, while Polyol-t from a transesterification of Polyol-r with glycerol through a litharge catalyst. A rigid polyurethane foam was prepared by mixed polyols (Polyol-t and commercial 635 polyether polyol) with 4,4'-methylene-bis (phenyl isocyanate). The hydroxyl value of Polyol-t was higher than that of Polyol-r, which was also backed up by Fourier transform infrared spectrometry. Scanning electron microscope examination revealed that the foam has closed cells. The test of performances of the foam shows that it possesses an excellent dimension stability and compressive strength.
Study on Structure Safety of the Tunnel Secondary Lining of Passenger Dedicated Line for High-Speed Railway during Service Period
Authors: Liu Yan
Published: August 2013

This article is based on the research on structure safety of the tunnel secondary lining of WU-GUANG passenger dedicated line during service period in China and points out that the dynamic crack of the tunnel secondary lining is the key factor that influences structure safety during service period. This article presents a new method for evaluating the cracking performance of the tunnel secondary lining during service period. The test result shows that new structural materials can improve the anti-cracking performance and structure safety of tunnel secondary lining during service period.