scholarly journals Specific Energy Consumption of a Belt Conveyor System in a Continuous Surface Mine

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5214 ◽  
Author(s):  
Witold Kawalec ◽  
Natalia Suchorab ◽  
Martyna Konieczna-Fuławka ◽  
Robert Król
Keyword(s):  
Energy Consumption ◽  
Specific Energy ◽  
Specific Energy Consumption ◽  
Electric Energy ◽  
Transportation System ◽  
Transportation Systems ◽  
Open Pit ◽  
Design Parameters ◽  
Belt Conveyor ◽  
Electric Energy Consumption

Belt conveyor (BC) transportation systems are considered to be the most effective for handling large volumes of bulk material. With regards to the rules of sustainable development, the improvement of belt conveyor technology is, in many cases, focused on environmental issues, which include the idea of energy usage optimization. The key issue in an energy-efficient transportation system is reducing the value of specific energy consumption (SEC) by increasing conveyor capacity whilst decreasing belt conveyor motion resistance. The main idea of this paper is to conduct an analysis of the modernization of existing belt conveyor transportation systems operated in open-pit lignite mines, in order to achieve relatively small electric energy consumption for a considered transportation task. The first part of the paper investigates the relationship between a conveyor’s SEC and material flow rate for various conveyor design parameters. Then, based on multi-parameter simulations, an analysis of electric energy consumption for a belt conveyor transportation system is carried out. Finally, an energy-saving, environmentally friendly solution is presented.

scholarly journals Parametric Optimization of Belt Conveyors by Energy Efficiency Criterion

2021 ◽  
pp. 50-58
Author(s):  
O. S Kuropiatnyk
Keyword(s):  
Energy Consumption ◽  
Specific Energy ◽  
Specific Energy Consumption ◽  
Design Parameters ◽  
Belt Conveyor ◽  
Belt Speed ◽  
Optimal Value ◽  
Optimal Values ◽  
Belt Conveyors ◽  
Belt Width

Purpose. The purpose of this work is to substantiate the optimal values of the belt conveyor parameters, at which the specific energy consumption for the cargo transportation takes on the lowest value. Methodology. The substantiation of the optimal values of the belt conveyor parameters was carried out by minimizing the function of specific energy consumption, which represents the energy consumption for the transportation of a cargo weighing 1 kg at a distance of 1 m. In the course of research, the drive force was determined using the contour bypass meth-od. In this case, the specific loads from the transported cargo, belt and roller supports were presented as functions of the belt width. To establish the optimal values of the conveyor productivity and belt speed, the belt width was presented as a function of these values, taking into account the physical and mechanical properties of the transported cargo, the design features of the roller supports and the belt angle. Findings. I obtained the dependences of specific energy consumption on the design parameters of the conveyor. Their analysis made it possible to identify the opti-mal values of the belt width, conveyor productivity, belt speed, and the optimal ratio of the last two values for dif-ferent types of transported cargo. It is noted that the results obtained can be supplemented by carrying out calcula-tions according to the formula given in this work. It has been established that the optimal value of the belt width depends only on the belt angle and on the coefficients that determine the energy losses, in particular the movement resistance coefficient of the belt; the influence of the specified coefficient increases with an increase in the belt angle. In addition, the optimal value of the belt width does not depend on the conveyor length, its productivity and belt speed. Originality. The dependences of the specific energy consumption on the design parameters of the belt conveyor were obtained, which made it possible to establish the optimal values of the belt width and the ratio of the conveyor productivity to the belt speed. Practical value. The results of this work can be used in the design of energy-efficient belt conveyors, which are characterized by the lowest specific energy consumption for cargo transportation.

scholarly journals Calculation of specific rates of the electric energy consumption at frequency regulation of electric drives: A case study of pumping stations

2021 ◽  
Vol 939 (1) ◽  
pp. 012001
Author(s):  
T Kamalov ◽  
A Isakov ◽  
A Shavazov ◽  
A Elmuratova ◽  
B Tukhtamishev
Keyword(s):  
Energy Consumption ◽  
Experimental Studies ◽  
Electric Energy ◽  
Electrical Energy ◽  
Design Parameters ◽  
Frequency Regulation ◽  
Electric Drives ◽  
Electric Energy Consumption ◽  
Pumping Stations ◽  
Pumping Units

Abstract The issues of developing a methodology for calculating the specific rates of electrical energy consumption during frequency regulation of electric drives of pumping stations are considered. When calculating specific consumption rates, experimental studies were carried out at the Chirchik pumping station. When developing the methodology, technological, design parameters, water consumption, as well as the total capacity of pumping units based on frequency-controlled electric drives are taken into account. At the same time, the characteristics of the main parameters that must be taken into account when choosing variable frequency drives for pumping units are determined.

scholarly journals Research of a machine with a belt conveyor for drying grain

2020 ◽  
Vol 193 ◽  
pp. 01071
Author(s):  
Andrey Pavlushin ◽  
Sergey Sutyagin ◽  
Galina Karpenko ◽  
Vadim Artemiev
Keyword(s):  
Energy Consumption ◽  
Specific Energy ◽  
Objective Assessment ◽  
Specific Energy Consumption ◽  
Experimental Studies ◽  
Conveyor Belt ◽  
Optimization Criterion ◽  
Regression Equation ◽  
Belt Conveyor ◽  
Grain Moisture

Currently, grain drying technology is imperfect. Therefore, the development and scientific substantiation of energy-saving, environmentally friendly installations for drying grain that meet the requirements of modern Russian agrarian production is an urgent and important scientific and technical task that is essential for the development of the country. To solve this problem, we have developed a contact-type installation with a belt conveyor. For an objective assessment of the research object, the specific energy consumption per 1 kg of evaporated moisture qуд, kJ/kg of moisture was taken as an optimization criterion. The study of the installation in the drying mode was carried out on oat grain. After processing the results of the experiments, a new equation was obtained. This is a regression equation in natural and coded values of independent factors. The regression equation characterizes the influence of independent factors on the optimization criterion. Having solved the regression equation, it was found that the minimum specific energy consumption for drying grain is 4388 kJ/kg of moisture. This value is achieved at an average temperature of the conveyor belt tᴤр = 60 °C and the residence time of grain in the installation τ>об = 40 s. In this case, the convergence of theoretical and experimentally obtained research results was at least 95%. The decrease in grain moisture during the heating cycle in the developed installation is 2 ... 2.5%, which corresponds to agrotechnical requirements. Thus, as a result of theoretical and experimental studies of the developed installation, it was revealed that with optimal values of independent factors, the specific energy consumption is 4388 kJ/kg of moisture, which is 1.5 times less compared to serial grain dryers, in particular, with the SZ - 1.

scholarly journals Model Based Simulation and Genetic Algorithm Based Optimisation of Spiral Wound Membrane RO Process for Improved Dimethylphenol Rejection from Wastewater

Membranes ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 595
Author(s):  
Mudhar A. Al-Obaidi ◽  
Alejandro Ruiz-García ◽  
Ghanim Hassan ◽  
Jian-Ping Li ◽  
Chakib Kara-Zaïtri ◽  
...  
Keyword(s):  
Genetic Algorithm ◽  
Energy Consumption ◽  
Specific Energy ◽  
Specific Energy Consumption ◽  
Operating Conditions ◽  
Design Parameters ◽  
Channel Height ◽  
Model Based ◽  
Feed Channel ◽  
Membrane Design

Reverse Osmosis (RO) has already proved its worth as an efficient treatment method in chemical and environmental engineering applications. Various successful RO attempts for the rejection of organic and highly toxic pollutants from wastewater can be found in the literature over the last decade. Dimethylphenol is classified as a high-toxic organic compound found ubiquitously in wastewater. It poses a real threat to humans and the environment even at low concentration. In this paper, a model based framework was developed for the simulation and optimisation of RO process for the removal of dimethylphenol from wastewater. We incorporated our earlier developed and validated process model into the Species Conserving Genetic Algorithm (SCGA) based optimisation framework to optimise the design and operational parameters of the process. To provide a deeper insight of the process to the readers, the influences of membrane design parameters on dimethylphenol rejection, water recovery rate and the level of specific energy consumption of the process for two different sets of operating conditions are presented first which were achieved via simulation. The membrane parameters taken into consideration include membrane length, width and feed channel height. Finally, a multi-objective function is presented to optimise the membrane design parameters, dimethylphenol rejection and required energy consumption. Simulation results affirmed insignificant and significant impacts of membrane length and width on dimethylphenol rejection and specific energy consumption, respectively. However, these performance indicators are negatively influenced due to increasing the feed channel height. On the other hand, optimisation results generated an optimum removal of dimethylphenol at reduced specific energy consumption for a wide sets of inlet conditions. More importantly, the dimethylphenol rejection increased by around 2.51% to 98.72% compared to ordinary RO module measurements with a saving of around 20.6% of specific energy consumption.

scholarly journals Energy consumption of track-based high-speed trains: maglev systems in comparison with wheel-rail systems

2018 ◽  
Vol 4 (3 suppl. 1) ◽  
pp. 134-155 ◽  
Author(s):  
Eckert Fritz ◽  
Larry Blow ◽  
Johannes Kluhspies ◽  
Roland Kircher ◽  
Michael H. Witt
Keyword(s):  
Energy Consumption ◽  
Specific Energy ◽  
Life Cycle Cost ◽  
Energy Demand ◽  
High Speed ◽  
Specific Energy Consumption ◽  
Transportation Systems ◽  
Maximum Speed ◽  
Complete Life Cycle ◽  
Rail Systems

Background: The energy consumption of a high-speed system is an important part of its total operational costs. This paper compares the secondary energy demand of different wheel-rail systems, such as ICE, TGV and Shinkansen, and maglev systems, such as Transrapid and Chuo Shinkansen. In the past, energy values of systems with different conditions (train configuration, dimension, capacity, maximum speed) were frequently compared. The comparative values were often represented by the specific energy consumption based on passenger capacity and line-kilometer values. Aim: The goal is to find a way to compare the specific energy consumption of different high-speed systems without any distortion of results. Methods: A comparison of energy values based on normative usable areas inside the high-speed systems will be described and evaluated in this paper, transforming the results to a more distortion-free comparison of energy consumption of different systems. Results: The results show the energy consumption as an important characteristic parameter of high-speed transportation systems based on an objective comparison and give ranges of expected energy demand of different systems dependent on maximum speed level. Conclusion: Up to the design speed of wheel-rail systems there are slight advantages in terms of energy consumption for the Transrapid maglev. From the perspective of energy consumption under consideration to reduce travel time, high-speed maglev systems represent a promising option for new railway projects. However, a project-specific system decision must be based on a complete life-cycle cost analysis, including investment cost

scholarly journals Improving the quality of milk dispersion in a counter-jet homogenizer

10.5219/1407 ◽  
2020 ◽  
Vol 14 ◽  
pp. 633-640
Author(s):  
Kyrylo Samoichuk ◽  
Dmytro Zhuravel ◽  
Nadiya Palyanichka ◽  
Vadim Oleksiienko ◽  
Serhii Petrychenko ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Specific Energy ◽  
Milk Fat ◽  
Specific Energy Consumption ◽  
Experimental Studies ◽  
Average Diameter ◽  
Optical Microscope ◽  
Design Parameters ◽  
Fat Globules

Homogenization is a necessary process in the production of drinking milk and most dairy products. The specific energy consumption of the most common valve homogenizers reaches 8 kW h.t-1. A promising way to reduce it is the introduction of more effective counter-jet homogenizers. The purpose of these studies is to increase the efficiency of machines of this type through fuller use of their kinetic energy. To achieve this, the design of a ring reflector was developed and experimental studies were carried out to determine its influence on the efficiency of milk fat dispersion in a counter-jet homogenizer. Calculations were made to determine the reflector’s design parameters. An installation for experimental research has been developed, in which the required milk pressure is created with the help of compressed carbon dioxide. The dispersive indices of the milk emulsion were determined by computer analysis of milk sample micrographs obtained with an optical microscope and a digital camera using Microsoft Office Excel and Microsoft Visual Studio C# software using the OpenCV Sharp library. As a result of research, the formula for defining the angle of the reflector top has been determined analytically. Experimental studies proved its validity and allowed determination of the optimal diameter. A comparison of the dependence of the degree of homogenization on the excess pressure in a counter-jet homogenizer proves a 15 – 20% increase in the degree of dispersion when using a reflector. At the same time, specific energy consumption does not increase. Comparison of the distribution curves of milk fat globules by size after counter-jet homogenization and homogenization with a reflector suggests that the average diameter of fat globules for the experimental method decreases from 0.99 to 0.83 μm. This indicates the high quality of the dispersal characteristics of the milk emulsion after processing in a counter-jet homogenizer with a reflector.

scholarly journals SPECIFIC ENERGY CONSUMPTION – THE COMPARISON OF BELT CONVEYORS

Mining Scince ◽  
2019 ◽  
Vol 26 ◽  
Author(s):  
Natalia Suchorab
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Inclination Angle ◽  
Specific Energy ◽  
High Efficiency ◽  
Bulk Material ◽  
Specific Energy Consumption ◽  
Mining Industry ◽  
Belt Conveyor ◽  
Belt Conveyors

Belt conveyors (BCs), because of their high efficiency, are widely used for bulk material handling in the mining industry. However, due to the high level of conveyors’ energy consumption, the belt conveyor systems generate a large part of mining costs. Therefore, the current solutions mostly focus on implementing new management strategies, which find energy consumption as a key indicator in designing belt conveyor systems. Belt conveyor equipment selection, conveying systems, operation, applied mining technology are considered to be areas where improvement of belt conveyors’ energy efficiency may be achieved. Moreover, they can be used to implement novel standards for BC equipment and the proposal of defining new quality standards and creating BCs’ classification has been already outlined. The main idea of the paper is to compare the values of specific energy consumption (SEC) of BCs with regard to the inclination angle of a conveyor route which results from technological needs. The multiple regression is used to find a relationship between two basic independent variables – the volume of transported material and conveyor’s inclination angle – and a dependent variable (SEC). The procedure enables to determine the value of SEC which is required for lifting the material. Presented results prove that the value of SEC required for lifting the material is crucial for the interpretation of the SEC value when it comes to energy efficiency comparison.

scholarly journals Analysis of Energy Consumption during Plowing Using a Motor-Block with Moldboard Plow

2019 ◽  
Vol 29 (3) ◽  
pp. 414-427
Author(s):  
Vladimir F. Kupryashkin ◽  
Aleksandr S. Ulanov ◽  
Nikolay I. Naumkin ◽  
Anatoliy V. Bezrukov ◽  
Michail G. Shlyapnikov
Keyword(s):  
Energy Consumption ◽  
Power Consumption ◽  
Specific Energy ◽  
Crop Production ◽  
Motor Block ◽  
Specific Energy Consumption ◽  
Traction Force ◽  
Design Parameters ◽  
Resistance Force ◽  
Moldboard Plow

Introduction. Plowing the soil is a major operation in the cultivation of crops. It is one of the most labor-intensive operations in crop production, accounting for about 40 % of all energy costs. Most of these costs fall on consumed power, ensuring the effective functioning of the motor-block unit with a moldboard plow. Therefore, estimation of power consumed by motor-blocks is the urgent task. Materials and Methods. To solve the problem of determining the energy characteristics of the motor-block unit during plowing, a theoretical analysis was carried out, including values of torque, traction force on running wheels, resistance during their rolling and resistance force at the jointers-depleted plow, with the account for the geometry of the plowing unit based on the motor-block. Dependences of power consumption and specific energy consumption were obtained using the method described below. Results.As a result of our analysis of the power balance, we obtained dependences to find power consumption, as well as the specific energy intensity of plowing the soil with a motor-moldboard plow, which allowed for energy assessment of the functioning of the agricultural unit. Discussion and Conclusion. On the basis of these dependences of the required power and specific energy consumption, taking into account experimental data on interaction of the plow with the soil, design parameters and technological modes of operation of the agricultural unit consisting of motor unit Neva MB-2S-7,5 Pro and plow P1-20/3, were obtained to facilitate the choice of optimal modes of their functioning.

scholarly journals A Theoretical Method for Efficient Design of Power Tiller Rotavator Satisfying Multiple Objectives

2020 ◽  
pp. 107-115
Author(s):  
Jyotirmay Mahapatra ◽  
Vinita Kashyap ◽  
Ajay Kumar Sharma
Keyword(s):  
Energy Consumption ◽  
Specific Energy ◽  
Velocity Ratio ◽  
Specific Energy Consumption ◽  
Design Parameters ◽  
Soil Conditions ◽  
Specific Work ◽  
Kinematic Parameters ◽  
Efficient Operation ◽  
Power Tiller

Several advantages of rotavator including negative draft generation make it the most suitable attachment to power tiller. Many factors affect the economy and performance of power tiller which includes specific energy consumption, resourceful use of available power, produced soil conditions and blade durability. Hence a systematic design method was developed for power tiller rotavator while considering all these factors simultaneously. Specific work done by rotavator was equalized with performable work of power tiller for different combination of design and kinematics parameter. The value of design and kinematic parameters included in the previous step were limited by the extremities. These limitations were imposed so as to get desired soil conditions and blade durability. The best combination of parameters that produces the desired soil condition with minimum specific energy consumption while utilizing the available power resourcefully was selected. Other design parameters were calculated using parameters from the selected combination. Rotavator design and kinematic parameters satisfying the above objectives were calculated and found to be velocity ratio of 5.12, forward velocity of 0.41 m/s, rpm of 80.19, operating width of 7.5dm and 30 number of blades mounted in 5 number of flanges. This method of optimisation can be adopted for improved power tiller rotavator design and efficient operation. But as this method is purely theoretical; practical verification of the design is essential before adopting for large scale industrial production.

Specific energy consumption of membrane bioreactor (MBR) for sewage treatment

2012 ◽  
Vol 65 (2) ◽  
pp. 380-392 ◽  
Author(s):  
Pawel Krzeminski ◽  
Jaap H. J. M. van der Graaf ◽  
Jules B. van Lier
Keyword(s):  
Energy Consumption ◽  
Specific Energy ◽  
Sewage Treatment ◽  
Specific Energy Consumption ◽  
Electric Energy ◽  
Hollow Fibre ◽  
Reactor Performance ◽  
Operational Parameters ◽  
Total Energy Consumption ◽  
Membrane Area

This paper provides an overview of current electric energy consumption of full-scale municipal MBR installations based on literature review and case studies. Energy requirements of several MBRs were linked to operational parameters and reactor performance. Total and specific energy consumption data were analysed on a long-term basis with special attention given to treated flow, design capacity, membrane area and effluent quality. The specific energy consumption of an MBR system is dependent on many factors, such as system design and layout, volume of treated flow, membrane utilization and operational strategy. Operation at optimal flow conditions results in a low specific energy consumption and energy efficient process. Energy consumption of membrane related modules was in the range of 0.5–0.7 kWh/m3 and specific energy consumption for membrane aeration in flat sheet (FS) was 33–37% higher than in a hollow fibre (HF) system. Aeration is a major energy consumer, often exceeding 50% share of total energy consumption. In consequence, coarse bubble aeration applied for continuous membrane cleaning remains the main target for energy saving actions. Also, a certain potential for energy optimization without immediate danger of affecting the quality of the produced effluent was observed.

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