bluuebunny/crossref_metadata_2025_split huggingface dataset:
Case Study on Prefabricated Sunspace-Addition Renovation for Existing High-Rise Residential Buildings and Its Energy Consumption Simulations
Authors: Song Ge , Chen Wenli , Xu Muyang 
Published: August 2020

Abstract
A large number of existing high-rise residential buildings in China have problems such as high energy consumption and poor comfort. Renovating them is an important way for sustainable urban development. This article first introduces a European sunspace addition method for existing high-rise residences, and then sets up unit models of different depths for energy consumption simulation. Four cities of cold regions of China are selected and simulation comparison of original state, conventional renovation, sunspace addition and its variants are made. The size of the window, the presence or absence of external shading, and the presence or absence of internal curtains influence factors for the energy performance of the sunspace. In addition, the effects of changing depth of sunspace on winter heating energy consumption and summer cooling energy consumption, as well as the impact of different construction details on energy consumption were also studied. The article verifies the feasibility of the objective renovation mode in terms of energy consumption and summarizes the corresponding conclusions.
Development Concept of Integrated Energy Network and Hydrogen Energy Industry Based on Hydrogen Production Using Surplus Hydropower
Authors: Ma Fangping , Li Lin , Zeng Qing , Zheng Jianmin 
Published: August 2020

Abstract
The development of hydropower industry is progressing rapidly in China, and the installed capacity and power generation are increasing year by year. However, due to factors such as transmission channels and power grid peaking capacity, hydropower consumption in some areas is facing greater pressure. As an excellent medium for energy interconnection, hydrogen energy can play an important role in promoting hydropower consumption. This paper introduces the current status and trends of hydrogen energy development in major developed countries and China, and analyzes the current status of China’s hydropower abandoned water. Based on the production of hydrogen using surplus hydropower in the Dadu River Basin in Sichuan, an integrated energy network research plan including hydropower, electrolytic hydrogen production, storage and transportation, hydrogen refueling, and hydrogen-powered vehicles is proposed. At the same time, the development concept of hydrogen energy industry including hydrogen energy source economy, hydrogen energy industry ecosphere and hydrogen energy sky road in western Sichuan is also proposed.
Exploring Critical Factors Influencing Green Development of the Power Grid Based on DEMATEL-ISM Model
Authors: Li Songrui , Chai Jianxue , Wang Meishun , Zhang Lihui , Tian Xin 
Published: August 2020

Abstract
Under the background of the Paris Agreement and Energy Revolution, the power grid, as a hub of energy supply, needs to explore the influencing factors of the green development to clear the development path. By analysing the framework of green power grid development, a three-level power grid green development indicator system including the power grid coordination upstream and downstream and the life cycle of power grid construction is constructed. The DEMATEL-ISM integration method was used to analyse the structure of the first-level indicators. Then, the results were analysed from three aspects: deep-rooted influencing factors, middle-level indirect influencing factors and surface-level direct influencing factors. The research results show that 22 influencing factors are interrelated, forming a hierarchical structure with 6 levels of influencing factors, of which 7 indicators are key factors. The study clarifies the impact of the power grid as a configuration and trading platform on the ecological environment, and provides an implementation path for the green development of the power grid to promote the coordinated of the power grid and the environment.
Energy Metal Lithium Research: Based on the Weilasituo Lepidolite and the Dahongliutan Spodumene Deposits
Authors: Yang Yongqiang , Xin Jiang , Guan Huiming , Wang Yang , Wang Fang 
Published: August 2020

Abstract
Lithium has very active chemical properties and is widely used in various fields. It is known as “the energy metal of the 21st century”, so we paid more attention on it. Basic characteristics and exploration progress of the Weilasituo lepidolite deposit and the spodumene ore deposit in the Dahongliutan area are introduced in this paper, in order to have a deep research for lithium. The discovery of thses special large lithium deposits have brought new attention to the research of granite pegmatite type lithium ore at north China. The group took the rare metal mining right of the Dahongliutan, which costs 2 billion yuan, so we need get more information for future exploration.
Research on Integrated Energy Technology of Green Campus Combined with Wind, Solar, Storage, Charging, Industry, Academia and Research
Authors: Long Min , Hu Bizheng , Wei Meifang , Han Chaowei , Cheng Xiang , Yang Jing 
Published: August 2020

Abstract
The research on the integration of wind, solar, storage, charging, industry, academia and research is an important embodiment of promoting the traditional energy system to step forward into the energy Internet system. The green smart campus is also a typical demonstration of the energy Internet. In this paper, an integrated construction scheme of wind, solar, storage, charging, industry, academia and research is put forward in combination with the actual situation. In order to realize multi-energy complementarity in a more scientific way, the operation mode of the micro-grid system is studied and analyzed in depth under grid-connected and off-grid modes, so that the emergency power for critical loads can be guaranteed when power is lost. The scheme provides a set of new and concrete solutions for colleges and universities to realize green and smart campus.
Review on Risk Early Warning of Coal-Based Synthetic Oil
Authors: Tian Shuicheng , Yang Pengfei , Tang Kai 
Published: August 2020

Abstract
In recent years, with the maturity of coal chemical technology, coal chemical industry has been developed by leaps and bounds. The following is the increase of coal chemical enterprises. The increase of coal chemical industry enterprises are naturally accompanied by the rising trend of coal chemical accidents. Because accidents of coal chemical industry are easy to cause heavy casualties, property losses and environmental pollution, it is important particularly to prevent accidents of coal chemical industry. In order to understand the research status of coal-based synthetic oil risk early warning, this article mainly reviewed the research status and the main research achievements of the risk index system of chemical industry in recent years. Taking risk identification, risk evaluation and risk early warning process as the main line, and compared the advantages and disadvantages of different early warning indicators system. And based on the study of coal-based synthetic oil related process flow, we forecasted the development trend of the risk early warning for coal-based synthetic oil.
Power Supply Reliability Assessment Including Island Division and Network Reconfiguration
Authors: Fu Xiaofei , Chen Ran , Wang Min , Wu Chao , Shen Bing , Yang Chao , Wang Yun 
Published: August 2020

Abstract
After the power distribution system (DS) fails, a single power supply recovery method will cause certain loads to fail to recover in time. To improve the reliability of distribution systems with distributed generation, this paper proposes a two-stage network restoration reliability assessment method considering island division and network reconfiguration. In the process of network fault recovery, firstly, distributed generation is used to supply power to the load point of power loss, islanding of the network after fault with the aim of minimizing power loss. Then the residual network is reconstructed and optimized by considering the network loss and voltage quality. Finally, the improved ieee33 node network is simulated based on Monte Carlo simulation method. The results show that this method is superior and can realize real-time load transfer, reduce power loss, improve the reliability of DS and the economy of system operation, Considering the continuous change of the network structure, the running state of the system can be described more accurately.
Study of the Development of Low-Carbon Energy in Beijing
Authors: Fu Jiaxin , Liu Yingqi 
Published: August 2020

Abstract
As in recent years Beijing has stuck to the new concept of development with the supply-side structural reform as the main thread, its socioeconomic growth has ushered in a new pattern revolving around the strategic positioning of the capital city. Meanwhile, the energy demand and supporting task of megacities have become more complicated and diverse and raised higher requirements for energy development. By drawing urban carbon emission charts, this article conducts an in-depth analysis of the carbon emissions of Beijing in 2017 largely in light of the supply side and the consumer end. The results show that total carbon emissions of Beijing are on the decrease, mainly because Beijing has continuously optimized its energy structure with a significantly increased proportion of clean energy, energetically developed renewable energies and continued to increase the rate of comprehensive energy utilization.
SSO Suppression Strategy of DFIG-Based Wind Turbine Based on Impedance Reshaping
Authors: Liu Qihui , Shi Chun , Pang Simin 
Published: August 2020

Abstract
In order to suppress the sub-synchronous oscillation (SSO) of DFIG-based wind power generation system, a new suppression strategy based on impedance reshaping is proposed in this paper. Firstly, the impedance model of DFIG-based wind power generation system set in static coordinate system is established, and the mechanism of SSO is analyzed through aggregated RLC equivalent circuit. Then, an impedance reshaping suppression strategy is proposed, the impedance model with additional suppression strategy is established, and its suppression mechanism is explained. Finally, the effectiveness of the impedance reshaping suppression strategy is verified by semi-physical experimental.
Research on Gas Mixing Characteristics and Combustion Performance of Micro Burner with Different Channel Angle
Authors: Long Peng , She Yanwen , Chen Hongjie 
Published: August 2020

Abstract
In this study, the cold and hot processes at different incident angles of the micro-burner are numerically simulated, and the flow field, concentration field and temperature field in the burner are analysed. The mixing effect of cold H2 and air streams is the worst when the angle is 15°, and the best while the angle is 75°.When considering the combustion process, the velocity distribution of air and H2 is similar to the cold state. The combustion temperature rises first, and the average temperature rise rate gradient of the section is the largest while the angle is 15°. The section temperature reaches the maximum in the length of 15mm. When the space of the micro-burner is sufficient, the angle has little effect on the combustion process. In the vicinity of the entrance section, different angles of incidence have a greater impact on the position of the fire in the burner and the violent reaction zone.
Theoretical Analysis of a Novel Tidal Current Energy Converter
Authors: Wu S , Wang S J , Liu Y J 
Published: August 2020

Abstract
Low tidal current velocity can be observed in most coastal areas of China. However, the device suitable for the effective conversion of tidal current energy under low flow velocity, and this conversion is necessary for tidal current energy extraction. This paper proposes a novel tidal current energy converter based on vortex-induced vibration (VIV) and artificial muscles. The converter uses the VIV phenomenon in the flow of the cylinder vibrator to efficiently convert the kinetic energy of the tidal current into the kinetic energy of the moving parts and uses the inverse phenomenon of the electric-motion characteristic of artificial muscles to directly convert the kinetic energy into electrical energy. This paper also discusses the VIV characteristics of the converter’s vibrator when connected to nonlinear damping. Theoretical analysis, numerical simulation, and prototype testing were used to determine the influence of various parameters on its hydrodynamic properties and a selection of structural parameters to achieve an optimal performance index. The analysis results showed that the prototype of the converter worked successfully when the flow velocity of the water was in the range of 0.5 m s−1 to 0.75 m s−1.
Key Issues in the Application of Supercritical Carbon Dioxide Fracturing in Unconventional Gas Well
Authors: Zhou Yi , Ni Hongjian , Shen Zhonghou , Teng Xueqing 
Published: August 2020

Abstract
Supercritical carbon dioxide is a promising approach to enhance oil recovery in a greener way compared to conventional fracturing technology. SC-CO2 fracturing has advantages of the complicated fracture network, low formation pollution, and methane replacement on account of its good performance of permeability, anhydrous fracturing fluid, less chemical additives, and solubility. Technical features and research state of SC-CO2 fracturing were discussed in this paper. Key issues in the application of SC-CO2 fracturing was summarized in the following aspects: Flow laws of SC-CO2 in the wellbore and fracture need to be lucubrated to provide a basis for fracturing design; Interactions between formation rock and SC-CO2 need to be studied to find the Fracture propagation laws; The proppant-carrying laws need to be explained clearly to form better support effect of the fracture; Effective CO2 tackifier and ultra-light proppant need to be found to improve the proppant-carrying capacity; SC-CO2 source and fracturing devices should be further considered to reduce the cost, increase the efficiency ensure production safety of SC-CO2 fracturing.
The Spatial Distribution and Potential for Energy Recovery of Urban-Rural Wastes in Guangdong Province, Southern China
Authors: Xiao Huaping , Tang Zhihua , Tan Yunkai , Yi Linzi 
Published: August 2020

Abstract
Wastes-to-energy (WTE) has been widely recognized as an effective way to save resources while minimizing environmental pollution, which has become the key issue for a sustainable society. Urban-rural wastes include all kinds of waste generated during human activities, which have a wide range from municipal solid waste (MSW) to agricultural residues and animal excrement, etc. In order to evaluate their potential for energy recovery and greenhouse gas (GHG) mitigation in Guangdong province, the generation, spatial distribution and energy potential of three typical waste streams (i.e. MSW, agricultural residues and animal excrement) were investigated using statistical and estimation methods. Results showed that: (1) MSW was mainly concentrated in the Pearl River Delta, but agricultural residues and animal excrement mainly distributed in the East Wing, West Wing and Mountainous Areas; (2) energy potential of studied wastes at least can reach 15.661 million tons of coal-equivalent and corresponding GHG mitigation is 41.720 million tons CO2 equivalent. The pattern of distributed utilization may be appropriate for rural wastes, such as agricultural residues and animal excrement, because recycling is difficult due to they are dispersed distribution. Results of this study may help decision-makers to evaluate the proper management of urban-rural wastes and can be a reference for other developing countries.
Controllable Fabrication of a Hierarchical CuO-Al2O3/C Composite from Green Algae for Removal of Ammonia Nitrogen
Authors: Zhang Xiangjun 
Published: August 2020

Abstract
In this work, a hierarchical composite with copper-alumina loaded on biochar from green algae (H-CuAl/BC) was prepared and removal process of ammonia nitrogen from simulation wastewater was developed. The composites were characterized by using SEM, XRD, BET and FTIR to investigate their morphologies and structures. The effects of temperature, dosage, initial ammonia concentration were investigated. The BET surface area of H-CuAl/BC was 302.3 m2/g. The adsorption isotherm and kinetic model of the adsorption of AN onto H-CuAl/BC from the simulated solution were investigated and the adsorption mechanism was discussed. In addition, the maximum adsorption capacity was achieved 52.89 mg/g. The mechanism of AN adsorption include the micropore adsorption by Va n der Waals forces, electrostatic attraction of hierarchical Al2O3 and complexation by copper-based.
Simulation Study on Urea Thermal Decomposition for SCR Process of Thermal Power Plant
Authors: Yu Xiaowei , Liu Yi , Zhou Yu , Wang Yanpeng , Zhang Yang , Zhu Yue 
Published: August 2020

Abstract
Urea was used for SCR reducer in many power plants, but its pyrolysis process was very complex, and this process was showed by the TGA-DSC experimental results. An effective method for urea-water solution thermal decomposition was investigated in this paper. The factors of temperature, O2 concentration and catalyst had been mainly studied and analyzed. It can be concluded that in range of 200-650 °C, with temperature increasing, the NH3 conversion rate increased, HNCO could be hydrolyzed to produce NH3 and CO2 when temperature was higher than 400 °C, and the NH3 conversion rate was higher than 50%, and the maximal NH3 conversion rate was 85.1% when temperature was 650 °C; NH3 conversion rate decreased with O2 concentration in carrier gas increasing. More NH3 was produced by hydrolysis of HNCO on SCR catalyst below 400 °C, because the hydrolysis of HNCO took place at temperature lower than 400 °C mainly, however, the promotion of catalyst for hydrolysis of HNCO was not observed at higher temperature.
The Sorption of Iodine by Modified Layered Double Hydroxides from Aqueous Solutions: Effects of Intercalation Groups and Cationic Ratio
Authors: Zhang Ling , Zhang Miaomiao , Zhao Hongting , Zhang Dong 
Published: August 2020

Abstract
Layered double hydroxides (LDHs) have been considered as one of promising sorbents to treat radioactive iodine contaminated soil. In the study, we investigate the effects of intercalation anions and cationic ratio of LDHs on the sorption of iodine from aqueous. The results from kinetic and isotherm sorption experiments showed that intercalation of organic anions (e.g., SDBS, SDS) and higher Mg:Al ratio (e.g., 4:1) have a benefit for the sorption of iodine. The sorption affinity (L·kg−1) of iodine with LDHs followed the order: SDS (604.5) > SDBS (528.2) > Cl− (514.2) > CO3
2- (461.8) > SO4
2- (311.4) and 4:1 (2912) > 3:1 (514.2)> 2:1 (281.2). It seems that the intercalation of SDBS and SDS provide additional aromatic structures, which is responsible to the specific binding between aromatic carbon with iodine.
Review of Tires Wear Particles Emission Research Status
Authors: Zhang Xinfeng , Chen Ping , Liu Fengyang 
Published: August 2020

Abstract
Tires ae the only components of the vehicle that direct contact with the ground. Tires act as the roles of the vehicle loading, driving and steering and so on. In the process of driving, the small particles will generate from the wear between tires and ground that are released to the atmosphere, soil and river. Considering tires wear principle, test methods, environmental effect and the working process of UN WP29 GRPE PMP group, this article give the summary and analysis. This article will briefly describe the generation and physical characteristics of tire wear particles, also include the test methods, transportation path and environmental effect.
Effects of Electro-fermentation on Increasing Lipid Extraction from Schizochytrium
Authors: Huang Kaiguo , Wang Lu , Tian Weikun , Wang Dian , Shi Yue , Zhang Kun 
Published: August 2020

Abstract
In this study, electro-fermentation was used as one of the ways to break the wall of microalgal biomass. Schizochytrium is a marine microalga rich in lipids. Chloroform and methanol are excellent solvents for extracting lipids from microalgae in that they can surmount the obstacles of cell walls, but they are too contaminated and exorbitant and are not suitable for large-scale fuel production. For the purpose of improving the extraction rate of microalgae lipid, utilizing electro-fermentation, the crude lipids content was increased by 55.6%, the lipids extraction efficiency was increased by 1373% after extraction with a series of solvents. Compared with 100% Bligh & Dyer, 80% lipids yield can be obtained by using only a small amount of chloroform, methanol and isopropanol.This study demonstrates that electro-fermentation could be an effective and energy-saving method of increasing lipid extraction efficiency from Schizochytrium.
Changes in Physical Properties of Hydrate Deposit during Hydrate Formation and Dissociation
Authors: Zheng Mingming , Wang Xiaoyu , Wei Meng , Wang Kai , Liu Tianle , Jiang Guosheng 
Published: August 2020

Abstract
The microscopic distribution pattern of hydrates in pores is closely related to the accuracy of seismic data and acoustic data in the exploration of hydrate resources, and has important influence on the permeability and mechanical stability of reservoirs during mining. This study performed macro-micro experiments of tetrahydrofuran (THF) hydrate formation and dissociation in solution and pore space. Dissociation characteristics of pore hydrate with different saturation and distribution pattern were observed, 2D and 3D models were built, fluid and quartz particle migration, channel blockage and reformation were captured and analysed. Results demonstrated that, as the concentration of THF in the solution increases from 19%, 24% to 29%, the main distribution pattern of the hydrate formed in the pores gradually changes from pore filling, particle cementation to skeleton supporting, while the dissociation behaviour of pore hydrate mainly happened at the pore filled area, particle surface and the particle connection area. As the saturation increases, the amount of water generated by dissociation increases, the more obvious the water migration, the greater the impact on the stability of the particles, and the more the formation of channels and blockages. During field methane recovery, controlling the dissociation rate of hydrates and fluid migration rate are helpful to maintain reservoir mechanical stability. Therefore, when temperature and pressure conditions are relatively stable, increasing the drainage channel can effectively reduce the turbulent oscillation, the impact on particle stability and blockage of sand production channel.