Evaluation on Energy Consumption of Steel Enterprises Based on TOPSIS

2011 ◽  
Vol 58-60 ◽  
pp. 709-714
Author(s):  
Dong Feng He ◽  
Ai Jun Xu ◽  
Hong Bing Wang
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Energy Recovery ◽  
Analysis Method ◽  
Entropy Weight ◽  
Whole Process ◽  
Process Energy ◽  
Comprehensive Indicator ◽  
Topsis Model

Evaluation on energy consumption is a key point for research of energy-saving work, and the current research mainly focuses on the energy consumption of individual processes. In order to solve the problem of energy consumption for the whole process of steel enterprise, three types of energy consumption indicators are proposed: comprehensive indicator, process energy consumption indicator and energy recovery indicator. A TOPSIS model has been established for energy consumption of steel enterprise. In order to avoid the tolerance caused by experts’ subjective consciousness, in the model, the indicator weight will be confirmed by entropy weight. Five steel enterprises were evaluated using this model. The result of evaluation is almost the same as the result of benchmarking analysis method, which has verified the availability of the model. The model has primarily solved the energy consumption problem for the whole process of steel enterprise.

To Analyze The Influence Factors on Energy Saving of Hybrid Bus

2012 ◽  
Vol 605-607 ◽  
pp. 19-23
Author(s):  
Ya Lee Jiao ◽  
Yao Ping Li ◽  
Wen Sheng Yan
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Energy Recovery ◽  
Influence Factors ◽  
Energy Condition ◽  
Hybrid Operation ◽  
Hybrid Bus

In order to discuss the different factors, influence on hybrid bus energy saving, we analyzed the collected data information which got when the hybrid bus driving. Discussing the situation that energy consumption and energy recovery when the hybrid operation. At last get the best operational condition when the hybrid bus can play a energy-saving role by analyze the factors such as recovery energy condition, different elevations and different starting ways

scholarly journals Development and Evaluation of Energy-Saving Electro-Hydraulic Actuator

Actuators ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 302
Author(s):  
Triet Hung Ho ◽  
Thanh Danh Le
Keyword(s):  
Mathematical Model ◽  
Energy Consumption ◽  
Energy Saving ◽  
Energy Recovery ◽  
Hydraulic Systems ◽  
Hydraulic Actuator ◽  
High Effectiveness ◽  
Simulation Results ◽  
The Mathematical Model ◽  
Insight Into

This paper will develop a novel electro-hydraulic actuator with energy saving characteristics. This system is able to work in differential configurations through the shifting algorithm of the valves, meaning that this developed system can be adjusted flexibly to obtain the desirable working requirements including the high effectiveness of energy recovery from the load, high velocity or torque. Instead of establishing the mathematical model for the purpose of the dynamic analysis, a model of the developed actuator is built in AMESim software. The simulation results reveal that the system is able to save approximately 20% energy consumption compared with a traditional without energy recovery EHA. Furthermore, to evaluate the accuracy of the model, experiments will be performed that prove strongly that the experimental results are well matched to the results attained from the simulation model. This work also offers a useful insight into designing and analyzing hydraulic systems without experiments.

scholarly journals An Innovative Design of Decoupled Regenerative Braking System for Electric City Bus Based on Chinese Typical Urban Driving Cycle

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Yanfeng Xiong ◽  
Qiang Yu ◽  
Shengyu Yan ◽  
Xiaodong Liu
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Control Strategy ◽  
Recovery Rate ◽  
Energy Recovery ◽  
Regenerative Braking ◽  
City Bus ◽  
Braking System ◽  
Recovery System ◽  
Braking Energy Recovery

This paper proposes a novel decoupled approach of a regenerative braking system for an electric city bus, aiming at improving the utilization of the kinetic energy for rear axle during a braking process. Three contributions are added to distinguish from the previous research. Firstly, an energy-flow model of the electric bus is established to identify the characteristic parameters which affect the energy-saving efficiency of the vehicle, while the key parameters (e.g., driving cycles and the recovery rate of braking energy) are also analyzed. Secondly, a decoupled braking energy recovery scheme together with the control strategy is developed based on the characteristics of the power assistance for electric city bus which equips an air braking system, as well as the regulatory requirements of ECE R13. At last, the energy consumption of the electric city bus is analyzed by both the simulation and vehicle tests, when the superimposed and the decoupled regenerative braking system are, respectively, employed for the vehicle. The simulation and actual road test results show that compared with the superposition braking system of the basic vehicle, the decoupled braking energy recovery system after the reform can improve the braking energy recovery rate and vehicle energy-saving degree. The decoupled energy recovery system scheme and control strategy proposed in this paper can be adopted by bus factories to reduce the energy consumption of pure-electric buses.

scholarly journals Analysis of Energy Consumption for Biomass Drying Process

2015 ◽  
Vol 2 ◽  
pp. 317 ◽  
Author(s):  
Edgars Vigants ◽  
Girts Vigants ◽  
Ivars Veidenbergs ◽  
Dace Lauka ◽  
Krista Klavina ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Moisture Content ◽  
Energy Saving ◽  
Electricity Consumption ◽  
Heat Consumption ◽  
Drying Process ◽  
Process Energy

<p class="R-AbstractKeywords"><em><span lang="EN-US">This study is dedicated to the analysis of the drying process energy consumption. In order to evaluate the main energetic processes that consume the most energy, the energy consumption of each individual drying process with and without air recirculation was modelled. The model shows that drying agent (air) recirculation is not an energy-saving operation, since it increases the total electricity and heat consumption. Recirculation of the drying agent increases the moisture content of the drying agent at the dryer entrance, which increases the need for fresh air in the dryer so that it can absorb the evaporating moisture from the dried material. An increased flow of the drying agent in the dryer increases the heat and electricity consumption.</span></em></p>

Discussion of Energy Consumption Analysis Method on Energy System

2011 ◽  
Vol 130-134 ◽  
pp. 1578-1581
Author(s):  
Cai Juan Zhang ◽  
Li Gang Wang ◽  
Ling Nan Wu ◽  
Tong Liu ◽  
Qiang Lu ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Economic Analysis ◽  
Energy Saving ◽  
Exergy Analysis ◽  
Energy Analysis ◽  
Rapid Development ◽  
Second Law Of Thermodynamics ◽  
Energy Utilization ◽  
Second Law ◽  
Analysis Method

With the social rapid development, the earth's limited primary energy such as coal, oil, natural gas etc will be exhausted; energy problem has caused worldwide widespread attention. Therefore, under the development of renewable energy, without exception, each country is actively trying to explore the new theory and using energy-saving and technology to improve energy utilization ratio and reduce the energy consumption and the harm on environment. Scientific analysis of energy saving is an important link of digging energy saving potential, effective energy analysis method plays a pivotal role in implementing saving energy. This paper summarized several energy analysis methods on the basis of the first and second law of thermodynamics, introduced the most widely used enthalpy analysis method, entropy analysis, exergy analysis and exergy economic analysis which are based on the second law of thermodynamics, introduced emphatically the specific consumption analysis theory development with exergy analysis and exergy economic analysis.

Current State of Energy Consumption and Countermeasures of Energy Saving for Iron and Steel Industry in China

2013 ◽  
Vol 446-447 ◽  
pp. 1353-1357
Author(s):  
Zhe Qiao ◽  
Jin Zhou Liu ◽  
Jing Song Wang ◽  
Qing Guo Xue
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Steel Industry ◽  
High Energy ◽  
Iron And Steel Industry ◽  
Steel Rolling ◽  
Iron And Steel ◽  
Control Center ◽  
Process Energy ◽  
Steel Works

In this paper, we find that factors which affect energy consumption are steel ratio coefficient and process energy consumption by analyzing energy consumption of every process in integrated steel works. On this basis we point out the main reason for the high energy consumption of iron and steel industry in China is that integrated steel works examine the production process without system energy saving ideas. Therefore we propose the countermeasures of energy saving in iron and steel industry in China in aspects of energy management and control center, iron-making system, steel-making system, steel rolling system, as well as secondary energy recovery, which is aimed at providing a way for energy saving and emissions reduction of iron and steel industry in China.

scholarly journals Purification of Methylsulfonylmethane from Mixtures Containing Salt by Conventional Electrodialysis

Membranes ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 23 ◽  
Author(s):  
Xinlai Wei ◽  
Yaoming Wang ◽  
Haiyang Yan ◽  
Ke Wu ◽  
Tongwen Xu
Keyword(s):  
Energy Consumption ◽  
Recovery Rate ◽  
Voltage Drop ◽  
Cost Effective ◽  
Operating Conditions ◽  
Separation And Purification ◽  
Whole Process ◽  
Process Energy ◽  
Separation Performances ◽  
Energy Consumption Calculation

Methylsulfonylmethane (MSM) is one of the main sources of sulfur for living bodies, but it is hard to obtain as a pure compound. Conventional electrodialysis (CED) is a mature technology that can be used for the separation and purification of biochemical products. In this study, the purification of MSM from mixtures containing salt was performed by CED. The effects of operating conditions such as operation voltage drop, feed MSM concentration, and electrolyte salt concentration on the separation performances were investigated. The results showed that the current efficiency reached 74.0%, and the energy consumption could be 12.3 Wh·L−1. As for the recovery rate and desalination rate, the highest recovery rate could be 97.4%, and the desalination rate was 98.5%. Based on process energy consumption calculation, the total cost of the whole process was estimated at only 2.34 $·t−1. Thus, CED is highly efficient and cost-effective for the separation and purification of MSM.

Study on the Index System of Energy Saving Evaluation for Steel Enterprises

2011 ◽  
Vol 58-60 ◽  
pp. 704-708
Author(s):  
Dong Feng He ◽  
Ai Jun Xu ◽  
Hong Bing Wang
Keyword(s):  
Energy Consumption ◽  
Analytic Hierarchy Process ◽  
Energy Saving ◽  
Index System ◽  
Evaluation Index ◽  
Analytic Hierarchy ◽  
The Index System ◽  
Energy Saving Technology ◽  
Process Energy ◽  
Hierarchy Process

In order to study the comprehensive effect of material flow and energy flow on energy consumption of steel manufacturing process, firstly, the using energy peculiarity and energy saving technology of energy process of steel enterprise were analyzed. Secondly, the evaluation index of energy saving for steel enterprises was put forward based on analytic hierarchy process. The rule layer includes process energy consumption, steel ratio and application of energy saving technology. The variable layer includes 22 indexes. Indexes’ weight of rule layer, steel ratio and application of energy saving technology was determined by analytic hierarchy process and Delphi method. Indexes’ weight of process energy consumption was determined according to the average process energy consumption value of key steel enterprises in china. Finally, the evaluation index system of energy saving for steel enterprises was established. With the index system, the energy saving level of one steel enterprise can be evaluated according to its actual production data. The index system is practical and easy to apply.

Based on Energy Recovery of Hydraulic System’s Calculation of Energy Consumption

2012 ◽  
Vol 468-471 ◽  
pp. 654-657
Author(s):  
Yong Tian ◽  
Hong Wei Gao ◽  
Bo Liu ◽  
Wei Qi Li
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Hydraulic System ◽  
Energy Recovery ◽  
Total Power ◽  
Saving Effect

Introduced the energy recovery hydraulic elevator system's principle of work, calculated the uplink and the downlink of the hydraulic elevator system's useful work, total power and efficiency, results show that energy-saving effect of the hydraulic system was more obvious.

The Research of Measuring Approach and Energy Efficiency for Hadoop Periodic Jobs

2015 ◽  
Vol 8 (1) ◽  
pp. 206-210 ◽  
Author(s):  
Yu Junyang ◽  
Hu Zhigang ◽  
Han Yuanyuan
Keyword(s):  
Energy Efficiency ◽  
Cloud Computing ◽  
Energy Consumption ◽  
Energy Saving ◽  
Energy Estimate ◽  
Cloud Platform ◽  
Periodic Tasks ◽  
Current Consumption ◽  
Reduce Energy Consumption

Current consumption of cloud computing has attracted more and more attention of scholars. The research on Hadoop as a cloud platform and its energy consumption has also received considerable attention from scholars. This paper presents a method to measure the energy consumption of jobs that run on Hadoop, and this method is used to measure the effectiveness of the implementation of periodic tasks on the platform of Hadoop. Combining with the current mainstream of energy estimate formula to conduct further analysis, this paper has reached a conclusion as how to reduce energy consumption of Hadoop by adjusting the split size or using appropriate size of workers (servers). Finally, experiments show the effectiveness of these methods as being energy-saving strategies and verify the feasibility of the methods for the measurement of periodic tasks at the same time.

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