scholarly journals Coordinated Speed Control Strategy for Minimizing Energy Consumption of a Shearer in Fully Mechanized Mining

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1224
Author(s):  
Zheng Zheng ◽  
Dilei Chen ◽  
Tao Huang ◽  
Guopeng Zhang
Keyword(s):  
Energy Consumption ◽  
Coal Mining ◽  
Rotational Speed ◽  
Critical Role ◽  
Energy Utilization ◽  
Coordination Strategies ◽  
Working Cycle ◽  
Study Results ◽  
Model Control ◽  
The Impact

As one of the major pieces of equipment in fully mechanized coal mining, the drum shearer plays a critical role in improving the efficiency and energy utilization in the coal mining production process. In this paper, an energy consumption model of a shearer, derived from the analysis of the cutting and traction resistances on the shearer during different processes within a working cycle, is established. Based on the derived model, control and coordination strategies between the two speeds are proposed to minimize the shearer’s energy consumption in unidirectional mining. The case study of a real coal mine shows that the proposed models are valid, and the optimal control of shearer speeds can effectively reduce the energy consumption by 5.16% in a working cycle. To gain further insights into the impact of traction speed and drum rotational speed on the shearer’s energy consumption, several speed coordination cases are employed to further compare with the optimized one. Our study results show that the energy consumption of a shearer can be decreased with the increase of traction speed while decreasing drum rotational speed in coordination.

Analysis of China’s Provincial Energy Efficiency Based on the Generalized DEA Method

2014 ◽  
Vol 953-954 ◽  
pp. 890-895
Author(s):  
Hui Min Li ◽  
Cun Bin Li ◽  
Zhan Xin Ma
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Total Energy Consumption ◽  
Rapid Economic Growth ◽  
Technology Changes ◽  
Dea Method ◽  
Save Energy ◽  
The Impact

In recent years, with the rapid economic growth, the demand on the amount of energy in China is increasing. So the problem of how to improve the energy utilization efficiency and save energy consumption has to be tackled. The traditional CCR model and BCC model used in the study of provincial energy efficiency do not take the impact of technological progress into consideration. Therefore, the paper uses the generalized DEA method to research the energy utilization efficiency of China’s 29 provinces, that is, to evaluate and analyze the energy utilization efficiency by selecting the capital stock, employment and total energy consumption of China’s provinces as input factors and GDP, per capital GDP as output factors, and then draw tables showing each province’s change of average annual overall efficiency and the pure technology changes, and finally analyze the regularities underlying these changes.

scholarly journals Technogenic carbonaceous objects of the Chervonohrad mining and industrial district and some technical solutions for their using

2019 ◽  
Vol 4 (181) ◽  
pp. 45-65
Author(s):  
Dmytro BRYK ◽  
Oleg GVOZDEVYCH ◽  
Lesya KULCHYTSKA-ZHYHAYLO ◽  
Myroslav PODOLSKYY
Keyword(s):  
Coal Mining ◽  
Coal Ash ◽  
Energy Utilization ◽  
Coal Waste ◽  
Coal Production ◽  
Industrial District ◽  
Waste Dumps ◽  
Wide Range ◽  
Coal Wastes ◽  
The Impact

Ukraine has significant coal resources. Chervonohrad Mining and Industrial District is the main coal complex in the west of Ukraine. In recent years, the average annual coal production in the mines of Chervonohrad Mining and Industrial District has amounted to 1.5 bn t, coal ash varies over a wide range of 25 to 53 %, average coal ash content of about 40 %. Coal mining has produced millions of tons of coal waste every year. Concentration of technogeneous coal objects (mines, mining infrastructure, coal-mining waste dumps and wastes of coal enrichment) in a relatively small area has caused environmental degradation. Therefore, technological and environmental aspects of carbon-containing technogenic objects are particularly important and actual. Coal-waste dumps in the territory of Chervonohrad Mining and Industrial District are characterized in detail. The dumps cover different areas – from 9–10 to 29–30 ha, the height of the dumps reaches 62 m at the mostly heights of 25–40 m. The total waste deposit in the dumps of existing mines has a volume of more than 20 million m3. The coal wastes from Mezhyrichanskaya mine coal-waste dump was investigated to determine the suitability for thermochemical processing. Technical characteristics of taken coal-waster samples is presented. The technogenic carbonaceous objects and the impact to the environment are evaluated. The developed and patented technical and technological solutions for the technogenic carbonaceous objects using are considered. It is shown that the concept of industrial development of coal wastes dumps is based on two aspects – extraction of valuable mineral components and energy utilization of carbonaceous wastes of coal production. Its patented as Patents of Ukraine technological schemes for terrestrial process in of solid carbonaceous raw material from dumps and sludges with the production of coal tar and synthesis gas CO + H2 are presented, as well as the scheme of a system for utilization of heat from coal dump. Recommendations for the implementation of innovative technologies are based on the results of the laboratory research. The purpose of the resolution is to obtain valuable components and energy from coal wasters while improving the environment.

scholarly journals Global Indicators of Sustainable Development: Evaluation of the Influence of the Human Development Index on Consumption and Quality of Energy

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2768 ◽  
Author(s):  
Alexei Yumashev ◽  
Beata Ślusarczyk ◽  
Sergey Kondrashev ◽  
Alexey Mikhaylov
Keyword(s):  
Sustainable Development ◽  
Energy Consumption ◽  
Human Development ◽  
Human Development Index ◽  
National Income ◽  
Clean Energy ◽  
Total Energy Consumption ◽  
Development Index ◽  
Study Results ◽  
The Impact

The article explores the impact of the quality and volume of energy consumption of the population on the human development index using a sample of a number of countries as an example. The hypothesis concerning the relationship between the amount of energy consumed, the human development index (HDI), and the environment (CO2 emissions into the atmosphere) has been verified. The study results show that the size and rating of the HDI are influenced by such factors as urbanization growth, gross domestic product (GDP), gross national income (GNI) per capita, the share of “clean” energy consumption by the population and business in total energy consumption, the level of socio-economic development, and R&D expenses. In the course of building the model, the recommendations by the United Nations (UN) and the Organization for Economic Co-operation and Development (OECD) were used. The results show that the volume of energy consumption not only affects the human development index in a particular country, but is also an important factor in determining the level of sustainable development. The results, obtained in the course of the study and described in the article, may be applicable in the practice of research related to the assessment of human development and sustainable development.

The Deepwater Horizon oil spill and factors associated with depressive symptoms among residents of the Mississippi Gulf Coast

2016 ◽  
Vol 25 (4) ◽  
pp. 534-549 ◽  
Author(s):  
Joohee Lee ◽  
Tim Rehner ◽  
Hwanseok Choi ◽  
Alan Bougere ◽  
Tom Osowski
Keyword(s):  
Depressive Symptoms ◽  
Oil Spill ◽  
Critical Role ◽  
Deepwater Horizon ◽  
Physical Symptoms ◽  
Psychological Effects ◽  
Deepwater Horizon Oil Spill ◽  
Content Type ◽  
Study Results ◽  
The Impact

Purpose – The purpose of the paper is to extend prior research on the psychological effects of the Deepwater Horizon oil spill disaster by developing and testing a conceptual model in which exposure to the oil spill through clean-up activity, physical symptoms, worry about the impact of the oil spill on health, and the disruption of the gulf/ocean-related lifestyle were hypothesized as predictors of depressive symptoms. Design/methodology/approach – The analysis included a randomly selected sample of 354 subjects from the three most Southern Mississippi counties. The Center for Epidemiologic Studies Depression Scale was used to measure depressive symptoms. Findings – Results indicated that physical symptoms since the oil spill were related to depressive symptoms directly and indirectly through worry about the impact of the oil spill on health and the disruption of the gulf/ocean-related lifestyle. Worry about the impact of the oil spill on health was related to depressive symptoms directly and indirectly through the disruption of the gulf/ocean-related lifestyle. Originality/value – Study results highlight that uncertainty and worry about the impact of the disaster played a critical role in understanding the psychological effects of the oil spill disaster, especially among coastal residents whose lifestyles were bound up with the gulf/ocean.

scholarly journals Drivers and Policy Choices of Industrial Total-Factor Coal Productivity: Evidence From Eastern China

2021 ◽  
Vol 8 ◽  
Author(s):  
Di Wang ◽  
Yueying Zhao ◽  
Zhiyuan Zhang ◽  
Xiaodi Yang ◽  
Xinchen Wen
Keyword(s):  
Economic Development ◽  
Energy Consumption ◽  
Eastern China ◽  
Energy Utilization ◽  
Eastern Region ◽  
Local Conditions ◽  
Frontier Analysis ◽  
Regulatory Policies ◽  
The Impact ◽  
D Investment

Identifying the critical factors of industrial total-factor coal productivity (TCP) and its promotion paths will help achieve the goals of regional energy conservation and pollution reduction. Based on the perspective of total-factor productivity, this paper integrates the methods of stochastic frontier analysis (SFA), Kaya identity, and STIRPAT model to systematically diagnose the temporal and spatial characteristics and the heterogeneous sources of the industrial TCP in 11 provinces of eastern China, and it proposes some differentiated regulatory policies for different provinces. The results show that the TCP is increasing year by year and tends to converge, which indicates that increasing TCP is more and more challenging. Further research shows that there are significant spatial differences in the impact of the economic development level (EDL), industrial economic structure (IES), energy consumption intensity (ECI), and energy consumption structure (ECS) on industrial TCP. As the original driving factors of technological progress, the impact of R&D investment intensity (RII) and R&D investment levels (RIL) on industrial TCP is relatively consistent in different regions. The former has a negative congestion effect on TCP due to the imbalance of R&D investment structure, while the latter has a positive effect on TCP. Therefore, the eastern region should increase R&D expenditure and optimize R&D expenditure structure as a general way to improve TCP in each region and adopt differentiated regulatory policies in economic development and energy utilization according to local conditions.

scholarly journals Research on the Impact of Industrial Development on Energy Utilization Efficiency under the Background of Urban Agglomeration Planning

2021 ◽  
Vol 283 ◽  
pp. 02026
Author(s):  
Yuan Zheng ◽  
Bo Yue ◽  
Xuesong Han ◽  
Zheng Li
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Industrial Development ◽  
Urban Agglomeration ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Total Energy Consumption ◽  
Central Cities ◽  
Urban Agglomerations ◽  
The Impact

At present, the trend of central cities leading the development of urban agglomerations and urban agglomerations driving regional development is becoming more and more significant. Based on the panel data of 16 cities in the Chengdu-Chongqing urban agglomeration from 2010 to 2015, this paper uses a fixedeffect model to study the relationship between industrial development and energy efficiency in urban agglomerations, central cities, and surrounding cities. The empirical results show that for the overall urban agglomerations, central cities and surrounding cities, the scale of the secondary industry has a negative correlation with energy consumption per unit of GDP. Industrial development will increase the total energy consumption, but it also contributes to energy efficiency. In order to achieve the goal of "carbon peak and carbon neutrality", cities must find a balance in development and seek ecological protection during development.

scholarly journals Impact of Moisture and Speed of Threshers on Efficiency of Crushing of Lupine Seeds

2020 ◽  
Vol 24 (2) ◽  
pp. 55-63
Author(s):  
Sławomir Gawłowski ◽  
Ryszard Kulig ◽  
Grzegorz Łysiak ◽  
Al Aridhee Jawad Kadhim ◽  
Zdybel Adam ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Rotational Speed ◽  
Raw Material ◽  
Hammer Mill ◽  
Process Variables ◽  
Average Dimension ◽  
Unit Energy ◽  
Four Levels ◽  
Dimension Of Particles ◽  
The Impact

AbstractThe objective of the paper was to determine the impact of moisture and rotational speed of threshers on the process of crushing of lupine seeds. Raw material was led to four levels of moisture from 8 to 14% every 2%. The studies were carried out on the laboratory hammer mill with the use of variable speeds of mill hammers within 5500-7000 rot∙min−1. The studies that were carried out proved significant relations (p<0.05) between the analysed process variables and energy consumption and susceptibility of seeds to crushing. It was stated that along with the increase of the rotational speed, a reduction in the drop of the average dimension of particles of mill takes place. Along with the increase of moisture of lupine from 8 to 14% a unit energy of crushing increases on average by approx. 83%. It was proved that the susceptibility ratio of seeds to crushing increases along with the increase of raw material moisture. Such relations were determined for all investigated rotational speeds of hammers.

scholarly journals Evaluation of the Energy Utilization Index in Sheep Milk Cooling Systems

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2127
Author(s):  
Marco Cossu ◽  
Luigi Ledda ◽  
Stefania Solinas ◽  
Andrea Cossu ◽  
Antonio Pazzona
Keyword(s):  
Energy Consumption ◽  
Energy Cost ◽  
Dairy Farms ◽  
Energy Utilization ◽  
Energy Monitoring ◽  
Cooling Systems ◽  
Sheep Milk ◽  
Economic Balance ◽  
The Impact ◽  
Original Information

The energy consumption of sheep milk cooling systems (MCSs) was quantified in this study to provide original information filling a literature gap on the impact of sheep milk cooling on the energy and economic balance in dairy farms. Performance and energy monitoring tests were conducted simultaneously on 22 MCSs in Sardinia (Italy). The results determined the cooling time as a function of the performance class and number of milkings. The Energy Utilization Index (EUI) was applied to measure the energy required to cool down the milk and estimate the incidence on its price. The average EUI was 1.76 kWh 100 L−1 for two-milkings and 2.43 kWh 100 L−1 for four-milkings MCSs, whereas the CO2 emissions ranged from 998 to 1378 g CO2 100 L−1 for two- and four-milkings MCSs, respectively. The estimated energy consumption for the storage of refrigerated sheep milk was 0.12 kWh 100 L−1. The malfunctioning MCSs averagely consumed 31% more energy than regular systems. The energy cost for cooling accounted for 0.61% on the current sheep milk price in Italy. Based on the analysis, the reported EUI values can be used as a preliminary indicator of the regular operation of MCSs.

scholarly journals Driving Factors of Energy Consumption in the Developed Regions of Developing Countries: A Case of Zhejiang Province, China

Atmosphere ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1196
Author(s):  
Ganghua Qing ◽  
Yifan Luo ◽  
Weiwei Huang ◽  
Wanjue Wang ◽  
Zijing Yue ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Value Added ◽  
Zhejiang Province ◽  
Growth Effect ◽  
Energy Structure ◽  
Total Energy Consumption ◽  
Positive Role ◽  
Industrial Sectors ◽  
Study Results ◽  
The Impact

Regional energy development and approaches are significant for China’s overall economic and social development. The GDP in Zhejiang province surpassed 6 trillion yuan in 2019, and its energy consumption reached 200 million tons of standard coal (tce), both of which are at the forefront of China. In order to explore the main factors of the increase in energy consumption in Zhejiang and provide essential references for energy saving and other provinces, this paper analyzes the total energy consumption and industrial sectors on the basis of the logarithmic mean divisia index (LMDI) model. Study results show that the economy’s scale is the most crucial factor affecting Zhejiang’s energy consumption, with a significant growth effect. In 2015, the scale effect increased energy consumption to the highest value of 14 million tce and then reduced it to 13 million tce in 2019. The impact of the population on energy consumption increased by 10 million tce from 2010 to 2019. Energy intensity reduces energy consumption by between 0.05 and 0.15 billion tce per year, which is the main factor in reducing energy consumption. The energy structure generally plays a weak positive role due to the different energy types. The decomposition of the energy consumption per unit of value added in the industrial sector showed that the intensity and structural effect primarily reduce energy consumption, for example, the metal smelting and rolling, textile printing and paper, electric power, heating, and other industries. According to the results, enterprises should enhance the intelligence and efficiency of dispatch management and emergency responses. Zhejiang should also accelerate an international oil and gas trading center and resource allocation base to reach its carbon-neutrality goal.

scholarly journals Analysis of the Impact of China’s Energy Consumption Structure on Energy Security

2021 ◽  
Vol 245 ◽  
pp. 01054
Author(s):  
Wang Ning ◽  
Li Zhao ◽  
Zhang Bei
Keyword(s):  
Energy Consumption ◽  
Energy Security ◽  
Energy Demand ◽  
Greenhouse Gas Emission ◽  
Energy Utilization ◽  
Practical Significance ◽  
Utilization Rate ◽  
Consumption Structure ◽  
Depth Analysis ◽  
The Impact

Energy, as the guarantee of China’s economic development, plays an important role in it. Nowadays, however, oil production almost reaches its upper limit and is going downhill. The yearly rising output of natural gas fails to meet the increasingly huge energy demand. Although coal reserves are large, it still gets into a bottleneck period due to environmental and technological reasons. Therefore, the adjustment and optimization of energy consumption structure is the primary problem for China’s energy security, and it has become, and will still remain as the core of China’s energy strategy in the future. So, it is of great theoretical and practical significance to delve into the inter relationship between energy consumption structure and energy security, and then to optimize energy consumption structure under the new situation. After an in-depth analysis on how to adjust the energy consumption structure to ensure energy security, the author finds several problems, for instance, an unreasonable energy consumption structure, a serious environmental pollution, a low energy utilization rate, and a recessive role of energy price market. To solve the practical problems, this paper puts forward three measures namely deepening the supply side reform, accelerating the energy technology innovation, and changing the concept in energy use. The improvement in energy consumption structure is not only of general significance to improve the energy security theory, but also of great significance for China to achieve the goal of greenhouse gas emission reduction and ensure energy security.

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