bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis and simulation of multi-station fusion layered structure based on MMC module
Authors: Chen Dong , Zhang Yanchi , Li He , Zhang Xinlin , Zhao Yuzhuo , Wang Chenlei , Xie Da 
Published: June 2021

Abstract
In order to solve the problems of low space utilization rate and insufficient power supply reliability of substations, a multi-station fusion technology with substations as the main body and multiple power stations (5G communication base station, electric vehicle charging station, data center and energy storage station) was proposed. In this paper, the layered structure of the new fusion power station with “multi-station fusion” is proposed to clarify the collaborative working mode of various parts in the new fusion power station through the layered structure, so as to prevent equipment failures caused by interlocking control information. At the same time, the topological structure of the energy transfer layer of the new fusion power station is designed, and the MMC module is used in the energy transfer layer for energy transmission. Then the verification procedure, analysis of the circuit feasibility of the output waveform and control of the signal waveform are realized on the hardware circuit.
Characteristics and evaluation of tight gas reservoir in Shaxi miao Formation, Northeastern Sichuan Basin
Authors: jingfeng Wu 
Published: June 2021

Abstract
The reservoir of Shaximiao Formation is mainly composed of channel coarse sandstone and fine sandstone. The rocks are dense, the lithology is single and the thickness is l arge. The physical properties of Shaximiao Formation are not clear for the northeast Sichuan area. Based on field and core physical property analysis of Shaximiao Formation in Northeast Sichuan Basin, the characteristics of porosity and permeability of Shaximiao Formation are defined, the porosity-permeability relation chart is established, and on this basis, The tight reservoir of Shaximiao Formation was evaluated, the result show that the favorable reservoir is mainly located in the intersection area of channel sand, the reservoirs are mainly of III type, followed by the reservoirs of II type, and the I type are the least.
Experimental study on the influence of inlet distortion on the performance of single suction centrifugal pump
Authors: Liu Yuwen , Lu Jinling , Wang Like , Jin En , Wang Kai , Wang Wei 
Published: June 2021

Abstract
As a renewable energy source, water energy is indispensable in hydropower generation, and centrifugal pump is widely used in hydroelectric generation. But the centrifugal pump usually uses elbow pipe inflow due to the limitation of installation space, and the inflow distortion will lead to the decrease of pump performance and the increase of vibration. In this paper, the influence rule of inflow distortion on external characteristics and pressure pulsation of centrifugal pump was analyzed. The research results show that the inflow of elbow pipe will lead to the decrease of the head and efficiency of the centrifugal pump, which will decrease by 0.68m and 1.5% at the maximum under the design condition. The increase of bend angle will increase the pressure pulsation at the inlet of the centrifugal pump, which has an influence on the pressure pulsation around the volute at different positions, especially the pressure pulsation intensity at the tongue position significantly increases. The research in this paper can provide reference for the design and safe operation of inlet pipeline in practical engineering.
Day-ahead Optimal Scheduling for Cluster Smart Buildings Considering Power Sharing
Authors: Wu Jiechen , Yi Haiqiong , Liu Mei , Wang Ying 
Published: June 2021

Abstract
With the deregulation of power industry and increasing penetration of distributed energy resources, the study on the optimal schedule of demand-side resource under the electricty market environment has attracted wide attention from academia and industry. In this study, a market-based operational framework for cluster smart buildings is proposed. On this basis, a day-ahead optimal scheduling strategy and model for cluster smart buildings considering the overall power balance and consumer preferences and behaviors is proposed. The smart building energy management system comprising photovoltaic, electric vehicles and thermostatic controllable loads aims to minimize the total energy procurement cost. And then, the numerical results indicate that the proposed scheduling model can achieve local power sharing in the smart community. Finaly, the optimal scheduling results under consideration or no consideration of the transformer power limit are discussed.
Research on Defect Diagnosis of High-voltage Cables in Power Grid Based on Statistical Theory
Authors: Wang Chunfeng , Fu Guanru , Xu Hang , Wang Xu , Zheng Weiqiang 
Published: June 2021

Abstract
In this paper, the ZR-YJV223-15kV cable is selected as the experimental sample, and the focus is on the change of the two insulation characteristic quantities, the dielectric loss factor and the polarization index. The insulation characteristic quantities of cables with different types of defects is tested and analysed during the combined electric and heating aging process. To obtain the differences in the evolution of the characteristic quantities affected by different types of defects, statistical analysis and OriginPro8 software scientific methods are used to systematically analyse and process experimental data, at the same time the correlation between each characteristic quantity is found out. It proves that the dielectric loss factor and polarization index can be used to screen out the types of cable defects in the aging stage. The research results will provide technical support to ensure the safe and reliable operation of the power system.
Simulation of the influence of structural parameters on methane explosion in closed vessels
Authors: Wang Xuxu , Guo Pinkun , Wang Zhirong , Wang Baishi , Liu Songjie , Xu Chuanqing , Chang Xinyue , Cao Xingyan 
Published: June 2021

Abstract
The gas explosion parameters are affected by the structural parameters. Therefore, the paper numerically studied the gas explosion in cylinder to quantify the dependency of gas explosion parameters on the structural parameters. The results show that both the volume and length-diameter ratio of the cylindrical container affected the methane explosion characteristic parameters. With the increase of volume in the same shape, the time to reach the maximum gas explosion pressure increased, while the maximum rate of pressure rise reduced. With the length-diameter ratio increased, the time to reach the maximum gas explosion pressure became longer and the maximum rate of pressure rise decreased. It is found that the maximum rate of pressure rise conformed to exponential 2D with the volume and length-diameter ratio.
Analysis on the Development of Renewable Energy Power Application in the Energy Transition
Authors: Kong Dexia , Liang Jun 
Published: June 2021

Abstract
Today’s world is in a wave of energy transition. Relying on the advantages of low carbon and rapid cost reduction, renewable energy has gradually become the core of many countries to promote energy transition and an important way to deal with energy crisis and environmental pollution. Renewable energy power generation has also become the main source of new power generation. Combining energy development, this article analyzes the problems of China’s renewable energy power, puts forward suggestions on related issues, promotes energy transition, and contributes to the establishment of a green and low-carbon circular economic system.
Study on the interchangeability between low calorific value coalbed methane blended with hydrogen, dimethyl ether and natural gas
Authors: Yu Zhou , Mandi Lin 
Published: June 2021

Abstract
China is rich in coal-bed methane resources, but the utilization rate is very low, especially the low calorific value coal-bed methane, because of its methane concentration cannot meet the requirements of direct utilization, it must be discharged into the atmosphere, resulting in serious energy waste and environmental pollution. In this paper, the interchangeability of hydrogen, dimethyl ether and low calorific value coalbed methane mixtures with natural gas, as well as the influence of blending proportion on the interchangeability were studied by AGA index method and Weaver index method respectively. The results show that: An increasing number of the blending proportion of hydrogen in low calorific value coalbed methane can promote the heat load index and air ejection index to meet the requirements of interchangeability, reduce the tendency of lifting and yellow tipping, increase the tendency of flashback and incomplete combustion; while increasing the blending proportion of methane in low calorific value coalbed methane can also promote the heat load index and air ejection index to meet the requirements of interchangeability, and at the same time, it reduces the tendency of lifting, but increases the tendency of flashback and incomplete combustion, and the possibility of yellow tipping. What’s more, because of the low calorific value of hydrogen, the heat load index is always unable to meet the interchange requirements, the dimethyl ether was introduced into the mixture, and the interchangeability between low calorific value coalbed methane blended with hydrogen, dimethyl ether and natural gas was studied as well. When the blending proportion of hydrogen is controlled at 20%, in order to meet the interchangeability requirements, the blending proportion of dimethyl ether should be controlled to 60%, but some measures should be taken to prevent flashback, such as appropriately reducing the diameter of fire hole.
Spatial structure and resource potential of heat storage in Nanmeng geothermal field
Authors: Zhang Xiaowei , Wang Yichen , Jiang Zhou , Li Jianmin , Zhu Jun , Zhao Lei , Jia Yingchao 
Published: June 2021

Abstract
The geothermal conditions in Jizhong Depression are superior, and the area has many years of geothermal development history at present. Nanmeng geothermal field is located in the dominant area of geothermal resources in Jizhong depression, most of which is suitable for large-scale geothermal development. The main reservoirs in Nanmeng geothermal field include pore sandstone reservoirs of Neogene Guantao Formation and bedrock reservoirs of Jixian System. The Jixian System is the main thermal reservoir in the region, with a buried depth of 2000-4000 meters, a thickness of 500-700 meters, and a heat storage temperature of 70-105°C. It is characterized by large amount of water, good water quality and easy recharge of reservoirs. According to the difference of overlying strata structure, the buried depth of the main reservoirs in Nanmeng geothermal field gradually increases from south to north. In this paper, the annual geothermal recoverable resource of Nanmeng geothermal field is calculated as 0.3 × 1016J by the heat storage method, and the produced water temperature and the dynamic fluid level of the produced water are analyzed by the numerical simulation method. Finally, the most favorable well spacing of Nanmeng geothermal field is determined as 4A, which lays a foundation for the geothermal resource planning and development in Nanmeng.
Structural De-leveraging of New Energy Enterprises and Corporate Risk-taking
Authors: Juan Wang 
Published: June 2021

Abstract
the exploitation and utilization of new energy have lifted the predicament of human energy. In the passing years, thanks to the increasing investment in the area of new energy, new energy enterprises have developed into a vital force to boost China’s economic development. However, currently, the success of investment projects of new energy enterprises is closely associated with the support of bank debt funds. In the context of “de-leveraging” of non-financial enterprises, does the de-leveraging of bank loans of new energy enterprises exert an impact on corporate risk-taking? With reference to Principal-agent Theory, Trade-off Theory and Heterogeneous Debt Theory, this paper explores the impact of deleveraging of bank loans on corporate risk-taking with A-share new energy listed companies from 2011 to 2019 as research samples. The research results suggest that: first of all, there exists a positive U-shaped relationship between deleveraging of bank loans of new energy enterprises and corporate risk-taking; besides, the deleveraging of bank loans of over-indebted enterprises will significantly alleviate corporate risk-taking; de-leveraging of bank loans of under-indebted enterprises will significantly increase corporate risk-taking.
Copula Correlation Modeling of Wind Farms Generation and Its Application in Power Dispatching
Authors: Nan Ning , Xiaokang Wu , Qianwen Shao , Min Xie , Binbin Huang , Shujia Li 
Published: June 2021

Abstract
With the large-scale integration of wind power into the grid, a model that can accurately describe the randomness of wind farm output and the correlation between them is of great significance to be constructed. A joint distribution function of multiple wind plants output model based on Copula theory is constructed. By introducing correlation and fitting coefficient, the attribute recognition theory is put forward to select the optimal model based on entropy weight method. Finally, the validity of Copula modeling is verified by using the synchronized historical data of California coastal wind farms as a sample. The results show that t-copula can not only describe the correlation between the original variables well, but also fit the empirical distribution function of the original samples accurately.
A prediction model of wellbore temperature and pressure distribution in hydrocarbon gas injection well
Authors: Wang Yichen , Ye Jigen , Wu Shuhong 
Published: June 2021

Abstract
For the sake of solving the problem that it is difficult to dynamically monitor the wellbore temperature and pressure of hydrocarbon gas injection well and accurately predicting the bottom hole injection pressure, a mathematical model to describe wellbore temperature and pressure distribution is presented according to the heat transfer principle, the energy conservation law and the momentum theorem. The Shiu-Beggs wellbore temperature calculation method is used in this model to avoid errors caused by inaccurate thermodynamic parameters, and the pressure gradient equation is modified by introducing correction coefficients to improve the calculation precision of the model in practice. The fourth-order Runge-Kutta method was used to solve the model, and the new model was analyzed and verified by actual field data. The results show that the wellbore temperature is nonlinearly distributed, while the wellbore pressure is linearly distributed, and the bottom hole pressure calculated by this model is more accurate than that calculated by other methods. This study can play a certain guiding role for the injection scheme design of hydrocarbon gas injection well.
Study on the optimization of co-HTC conditions towards maximized fuel performance and lower sulfur contents of ROM coal/lignocellulosic biomass hydrochars
Authors: Fakudze Sandile , Wei Yingyuan , Ma Ru , Chen Jianqiang , Han Jiangang 
Published: June 2021

Abstract
Run-of-mine (ROM) coal and rice straw (RS) were upgraded by co-hydrothermal processing in oxidative acid/alkaline solvents. Optimization of co-HTC parameters was performed using the Taguchi method to investigate optimal conditions for the production of hydrochars with desired fuel properties. Based on calculations of S/N ratios, hydrochar with the best combustibility can be produced using the lowest reaction temperature (180 °C) and residence time (4 h), hence minimizing energy consumption. Hydrochars produced using optimal conditions for the best EY and PA indices had very high HHV values of 29.4 and 29.0 MJkg-1, respectively. In addition, ROM coal/RS hydrochars prepared using optimal conditions were characterized by lower sulfur contents (0.00-0.41 wt.%) and considerably low post-combustion ash contents.
In-situ Hydrothermal Synthesis of SnS2/SnO2/rGO Nanocomposites with Enhanced Photogenerated Electron Transfer for Photoreduction of CO2 to CH4
Authors: Jin Cheng , Feng Wei , Zhao Xiaoyan 
Published: June 2021

Abstract
The ternary SnS2/SnO2/rGO nanocomposites were successfully designed and fabrication for promoting the separation and transfer of photogenerated electrons. Based on the introduction of rGO, adjusting the content of SnS2 can tune the energy of the conduction band to a suitable position, which can promote the activity and selectivity for photocatalytic reduction of CO2. The internal mechanism of the energy band structure that determines the separation and transport of photogenerated electrons was further studied to establish the relationship between the energy band and the photocatalytic performance of activity and selectivity. This work provides some references for the field of photocatalytic decarburization.
Combustion performance of hydrochars produced via citricacid-assisted hydrothermal carbonization of pomelo peel at various temperatures
Authors: Ma Ru , Fakudze Sandile , Chen Jianqiang 
Published: June 2021

Abstract
The shortage of fossil energy has become a worldwide problem. China has a vast land and a dense population, and the consumption of energy is becoming huge day by day. Biomass as a renewable and eco-friendly energy source has attracted extensive attention from researchers. In this study, biomass fuel was prepared by hydrothermal carbonization (HTC) technology with pomelo peel as feedstock. The combustion performance of citric acid (CA) assisted hydrochar based on pomelo peel was investigated under different treatment temperatures. The results show that the sample of PPH220-CA can become a good biomass fuel with excellent C content of 71.2%, HHV value of 27.7MJ/kg and combustion adequacy of 3.04%, so it is possible to play a role in the energy field in the future as an alternative fuel for coal.
Application of hydrogen energy in low carbon cities
Authors: Xin Gao 
Published: June 2021

Abstract
Hydrogen energy, as a new clean energy, has attracted wide attention all over the world because of its own advantages, and China is also one of the hydrogen energy plans in some countries. But most of the investment and energy of hydrogen energy are in other fields, such as transportation. Low carbon cities are the development model to deal with environmental deterioration and climate change in recent years. They introduce low carbon clean energy, introduce low carbon energy in small towns and construction life cycle, and establish low carbon operation system. For hydrogen valley or hydrogen energy town model to provide reference. Through the analysis and comparison of the initial utilization of hydrogen energy and other energy sources at home and abroad and the literature of energy towns, and according to the development experience at home and abroad, the feasibility and operation mode of hydrogen energy in low carbon towns are summarized.
Investigation and Research on Utilization Rate of Construction Waste Resource in Wuhan
Authors: Zhu Botao , Zou Zuxu , Liu Yueyang 
Published: June 2021

Abstract
With the continuous development of the construction industry, the utilization rate of construction waste recycling is still at a low level. Therefore, the government has issued relevant policies to reduce construction waste and take measures for resource utilization. Based on the estimation of the output of construction waste in Wuhan in the past ten years, the current utilization level of construction waste in Wuhan is obtained. In combination with the current policy and Wuhan city construction waste recycling enterprise’s game, it is concluded that the government needs to enhance the construction waste recycling enterprise of rewards and punishments, so as to improve the utilization of construction waste.
Study on performance test methods and test rules of small complete set of domestic sewage treatment plant
Authors: Jin Huang , Youfeng Sun , Xiaoxin Zhang , Xia Huang , Guanjun Wang 
Published: June 2021

Abstract
This paper describes the test methods and corresponding test rules for the appearance, function, manufacturing, strength and tightness, safety, environmental protection, reliability, economy and generality of the small domestic sewage treatment plant, it can provide technical support for the quality improvement of small domestic sewage treatment plants in China.
Research of AHP evaluation for operation performance of water reuse system in industrial park
Authors: Xiaoxin Zhang , Jin Huang , Ling Lin , Yong Cui , Xiuteng Wang , Sinan Zhang , Fei Fang 
Published: June 2021

Abstract
The operation performance evaluation of water reuse system in industrial park is an extremely important and complex issue in the management of water reuse system. Based on constructing the operation performance evaluation index system of the water reuse system in industrial park in China, according to the characteristics of the analytic hierarchy process (AHP), evaluation system was established to evaluate the operation performance of the water reuse system in industrial park. AHP evaluation model fully considers the subjective and objective factors with effectiveness and scientific nature.
Research on transforming food waste into valuable products
Authors: Guo Hanwen , Tong Lin , Guo Yuzhen , Shu Tianchu , Li Xu , Bai Binjie , Nie Xiaoqin 
Published: June 2021

Abstract
Transforming food waste into valuable products could solve the double crises of both depletion of fossil fuels and environmental pollution. Literature and filed research were combined for identifying the transforming technologies. Material balance analysis was used for the calculation of outputs from these technologies. Composting, feeding, anaerobic digestion, bioethanol conversion, biodiesel conversion as well as the integration system-biorefinery were the common technologies applied around world. With the material balance analysis, the outputs of each technology were compost, insect-based feed, biogas, bioethanol and biodiesel respectively. The amount of productions is not at a high level, both less than 20%, however when substituting fossil energy or materials, these food waste-based products could achieve good benefits. On the other hand, with the diversified technology systems, how to choose the optimal of technology with a good balance on resource, energy and environment respects, is another problem to be solved.
Experimental Research on the Seismic Capability of new green building materials
Authors: Wei Lihua , Liu Fuqiang , Feng Fei , Sun Yuxuan 
Published: June 2021

Abstract
It is the development trend of China’s housing industry to actively research and develop new green building materials and promote renewable energy. Glass fiber gypsum board concrete frame is green building material, and it has many advantages in building structure, including load-bearing, thermal insulation and so on. Based on the experiments of structure underhorizontal low cyclic loading, the aseismatic capacity of the connecting structure of the fiber-reinforced plasterboard and concrete frame is studied in this paper. Excellent aseismatic reliability of the two types connection had been showned in this experiment. So the scientific references to the designing and constructing of connection between fiber-reinforced plasterboard and concrete frame were offered.