scholarly journals Experimental Determination of the Influence of the Peeling Machine Constructive and Operating Parameters on the Criteria of the Peeling Process Efficiency

2021 ◽  
Vol 31 (4) ◽  
pp. 577-590
Author(s):  
Alexander V. Anisimov ◽  
Feliks Ya. Rudik
Keyword(s):  
Power Consumption ◽  
Energy Intensity ◽  
Relative Yield ◽  
Ash Content ◽  
Specific Power ◽  
Specific Power Consumption ◽  
Wheat Grain ◽  
Peeling Process ◽  
Technological Efficiency

Introduction. The determination of the optimal technological efficiency of the peeling process, in terms of the number of detached casings and unit costs of the process, is an important task. The purpose of the study is to give reasons for a comprehensive evaluation criterion of the technological efficiency of peeling wheat grain and choose the optimal values of the parameters of grain peeling, taking into account the energy intensity of the process. Materials and Methods. To quantify the technological efficiency of peeling wheat grain, we used the following local efficiency criteria: the relative yield of peeling by-products, the relative decrease in grain ash content, the increase in the number of cracked grains, and a comprehensive criterion of efficiency taking into account local criteria and the specific power consumption. Results. The experiments have shown that the technological feasibility of the peeling process is ensured at the percentage of the flap opening at the outlet of the machine 60‒70%. In this case, the relative yield of waste husk is 3.2‒2.8%, the relative decrease in grain ash content is 0.32‒0.20%, and the increase in the number of cracked grains does not exceed 0.85%. With increasing the degree of the flap opening at the outlet of the machine from 50 to 100%, the specific power consumption decreases from 8.7 to 3.5 kW∙h/t. Discussion and Сonclusion. To assess the technological efficiency of wheat grain peeling a generalized efficiency criterion, which includes local criteria, is proposed. It has been experimentally proved their dependence on the intensity of grain processing in the machine. The optimum combination of the flap opening degree at the outlet of the machine at 67% (productivity 0.7 t/h) and the specific power consumption of 5.8 kW∙h/t was defined. In this case, the efficiency complex criterion, taking into account the process energy intensity of, is 4.5 kg/kW∙h.

scholarly journals Development of specific standards of energy consumption by types of produced products of the spinning product

2020 ◽  
Vol 216 ◽  
pp. 01169
Author(s):  
F A. Hoshimov ◽  
I I Bakhadirov ◽  
M S Kurbanbayeva ◽  
N.A. Aytbayev
Keyword(s):  
Energy Consumption ◽  
Power Consumption ◽  
Energy Intensity ◽  
Electricity Consumption ◽  
Static Method ◽  
Specific Power ◽  
Specific Power Consumption ◽  
Factors Influencing ◽  
Static Data ◽  
Predicted Values

The article deals with the regulation of the energy consumption of a spinning enterprise. For a certain pattern of changes in power consumption and specific power consumption, we studied the hourly performance, which determines the performance of the machine. On the basis of the predicted values of the volume of production, the norms of electricity consumption were developed, which are reflected, taking into account its specificity, the energy intensity of products. When developing the norm, a calculated static method was adopted, based on the analysis of static data for a number of previous years, on the actual consumption of electricity, the volume of output of factors influencing their change.

scholarly journals Innovative approaches and methods to the implementation of energy-saving measures and technologies at mining enterprises

2021 ◽  
Vol 288 ◽  
pp. 01109
Author(s):  
Alexander Semenov ◽  
Yuriy Bebikhov ◽  
Ayaal Egorov ◽  
Vladislav Shevchuk ◽  
Marina Glazun ◽  
...  
Keyword(s):  
Power Consumption ◽  
Mathematical Simulation ◽  
Energy Saving ◽  
Electric Drive ◽  
Economic Benefit ◽  
Energy Savings ◽  
Reactive Power ◽  
Specific Power ◽  
Specific Power Consumption ◽  
Instrumental Monitoring

The paper presents the evaluation of the implementation of innovative methods of energy savings in electric drive and power supply systems at mining enterprises. The evaluation involves mathematical simulation and instrumental monitoring of the defined indicators that allow obtaining a multiplier economic benefit through the appropriate approach to the implementation and subsequent exploitation of energy-saving technologies. For this purpose, the potential of energy savings in industry in general, and at mining enterprises in particular, is shown. Such indicators as power consumption in mining, the dynamics of power losses in public grids, specific power consumption for lighting and household needs, specific power consumption for lifting and supplying water, as well as for sewage treatment were evaluated. As an example, such measures as reactive power compensation, the introduction of frequency-controlled electric drive systems, the development and implementation of the systems for continuous monitoring of power quality indicators were considered pointwise (at some sites of enterprises). The mathematical simulation method was implemented using the MatLab software package. The instrumental monitoring was carried for 7 days with a ten-minute interval. As a result of the assessment of such measures, the total economic benefit approaching to 9.0 million rubles a year was obtained.

INFLUENCE OF THE HEIGHT OF THE SLAG LAYER ON THE EFFICIENCY OF ARCS AND ELECTRICITY CONSUMPTION IN EAF

2020 ◽  
pp. 66-72
Author(s):  
A.N. Makarov ◽  
Keyword(s):  
Power Consumption ◽  
Electricity Consumption ◽  
Slag Layer ◽  
Specific Power ◽  
Specific Power Consumption ◽  
Heavy Duty

Investigated the influence of the height of the slag layer in the nomenclature row EAFs, with a capacity from 0.5 to 120 tons, on the efficiency of arcs and specific power consumption in the furnaces. It was found that with an increase in the height of the slag layer, the efficiency of arcs in low-tonnage and heavy-duty furnaces increases and reaches 78…80 % when the arcs are completely immersed in the slag, and the specific power consumption decreases. With an increase in the height of the slag layer and an increase in the efficiency of arcs by 1%, the specific power consumption in the furnaces decreases by 0.75…1.0 %.

Agitation of a gas-solid-liquid system in a vessel with high-speed impeller and vertical tubular coil

2012 ◽  
Vol 66 (6) ◽  
Author(s):  
Marta Major-Godlewska ◽  
Joanna Karcz
Keyword(s):  
Power Consumption ◽  
High Speed ◽  
Gas Bubbles ◽  
Liquid System ◽  
Specific Power ◽  
Specific Power Consumption ◽  
Rushton Turbine ◽  
Agitated Vessel ◽  
Solids Concentration ◽  
Solid Liquid

AbstractExperimental results of gas hold-up, power consumption and residence time of gas bubbles in a gas-solid-liquid system produced in an agitated vessel equipped with a high-speed impeller and a vertical tubular coil are presented in this paper. Critical agitator speed, needed for the dispersion of gas bubbles and solid particles in liquid were also identified. The studies were carried out in an agitated vessel of the inner diameter D = 0.634 m and the working liquid volume of about 0.2 m3. A tubular coil of the diameter of 0.7D, consisting of 24 vertical tubes of the diameter of 0.016D, was located inside the flat-bottomed vessel. The agitated vessel was equipped with a Rushton turbine with six blades or an A 315 impeller with four blades. Both impellers had diameter, d, equal to 0.33D. The vessel was filled with liquid up to the height H = D. In this study, air and particles of sea sand with the mean diameter of 335 μm and the concentration of up to 3.0 mass % were dispersed in distilled water as the liquid phase. The measurements were carried out within the turbulent regime of the fluid flow in the agitated vessel. Results of the measurements were processed graphically and mathematically. Lower values of the critical agitator speed, n JSG, needed for simultaneous dispersion of gas bubbles and particles with the solids concentration from 0.5 mass % to 2 mass %, were obtained for the vessel equipped with the A 315 impeller. Higher values of the specific power consumption were reached for the vessel with the Rushton turbine. Higher values of the gas hold-up and residence time of the gas bubbles in the fluid were obtained for the system equipped with the Rushton turbine. Results of the gas hold-up as a function of the specific power consumption, superficial gas velocity and solids concentration were approximated with good accuracy using Eq. (5).

scholarly journals Optimization and Experiment of Straw Back-Throwing Device of No-Tillage Drill Using Multi-Objective QPSO Algorithm

Agriculture ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 986
Author(s):  
Hongbo Xu ◽  
Zhichao Hu ◽  
Peng Zhang ◽  
Fengwei Gu ◽  
Feng Wu ◽  
...  
Keyword(s):  
Power Consumption ◽  
Mathematical Models ◽  
Specific Power ◽  
No Tillage ◽  
Sectional Area ◽  
Specific Power Consumption ◽  
Cross Sectional ◽  
Rotating Speed ◽  
Multi Objective ◽  
Straw Retention

Reducing operation energy consumption is the development demand of conservation tillage equipment. In order to solve the problems of high power consumption and the easy blockage of the no-tillage drill under full straw retention, the key parameters of the straw back-throwing device were optimized in this study. The Box–Behnken central combination test method was used to analyze the influence of the impeller rotating speed, feed quantity and cross-sectional area of the throwing pipe on the specific power consumption and throwing speed, the mathematical models of which were built with the aid of the least square method. In addition, the mathematical models were optimized by using a multi-objective quantum behaved particle swarm optimization (QPSO) with an improved target weighting coefficient. The optimization results indicated that, when the impeller rotating speed was 2287 r/min, the feed quantity was 1.1 kg/s and the cross-sectional area of the throwing pipe was 506.997 cm2, the specific power consumption and throwing speed by the models were 7528 m2/s2 and 11.73 m/s, respectively. The models were verified by comparing the optimization results with the measured data in the simulation filed tests, which proved that the multi-objective QPSO algorithm was feasible to optimize the working and structural parameters of the straw back-throwing device of the no-tillage drill under full straw retention. The results provide references for the parameter optimization of similar no-tillage drills under straw retention.

scholarly journals Oxygen Specific Power Consumption Comparison for Air Separation Units

2014 ◽  
Vol 18 (2) ◽  
pp. 67-80 ◽  
Author(s):  
Yas A. Alsultannty ◽  
Nayef N. Al-Shammari
Keyword(s):  
Power Consumption ◽  
Air Separation ◽  
Specific Power ◽  
Specific Power Consumption

Performance Analysis of Solar Thermal Powered Supercritical Organic Rankine Cycle Assisted Low-Temperature Multi Effect Desalination Coupled With Mechanical Vapor Compression

2018 ◽  
Author(s):  
Eydhah Almatrafi ◽  
Francesca Moloney ◽  
D. Y. Goswami
Keyword(s):  
Low Temperature ◽  
Power Consumption ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Solar Thermal ◽  
Specific Power ◽  
Low Grade ◽  
Vapor Compression ◽  
System Efficiency ◽  
Specific Power Consumption

Power and freshwater demand are increasing as populations around the world keep growing. Due to the environmental impact of using fossil fuels and limited resources, using solar thermal in desalination application is a valuable option. In this paper, an innovative new design of low temperature multi-effect desalination coupled with mechanical vapor compression (LT-MED-MVC) powered by supercritical organic Rankine cycle utilizing a low-grade solar heat source using evacuated tube collectors is analyzed. The proposed design has the potential to desalinate water of high salt concentrations or brine with high salinity more than 100,000 ppm or effluent streams from a power plant with low energy consumption and high efficiency when compared to the previously discussed systems. The performance of the LT-MED-MVC was found to be better than similar systems found in the literature. The specific power consumption for MVC is lower than 4 kWh/m3 for seawater feed salinity of 100,000 ppm, 14 forward feed effects, and a recovery rate of 50%. The overall system efficiency is about 14%. The impact of increasing the number of effects, motive steam temperature, pressure of supercritical-ORC and salt concentration on the specific power consumption, solar collector area, and the system efficiency are also analyzed.

Simulation and Characterization of a Hybrid Concentrated Solar Tower System for Co-Generation of Power and Fresh Water

2017 ◽  
Author(s):  
Kasra Mohammadi ◽  
Jon G. McGowan
Keyword(s):  
Power Consumption ◽  
Fresh Water ◽  
Cooling System ◽  
Rankine Cycle ◽  
Power Production ◽  
Hybrid Plant ◽  
Specific Power ◽  
Water Production ◽  
Specific Power Consumption ◽  
Power Block

The goal of this study is to evaluate and compare the thermodynamic performance of three feasible hybrid solar power tower-desalination plants for co-generation of power and fresh water. In these hybrid configurations, either multi effect desalination (MED) or thermal vapor compression (TVC)-MED unit is integrated to the Rankine cycle power block. The particular focus is on comparison between single plant and hybrid plants in terms of energy efficiency and penalty in power production to determine the more efficient configuration. The achieved results showed that integration of MED unit to the power cycle is thermodynamically more efficient, due to less reduction in power production and efficiency than the TVC-MED configurations. Also, for hybrid solar tower-MED plat, the average penalty in power production was between 9.27% and 12.88% when fresh production increased from 10000 m3/day to 31,665 m3/day. Another important finding showed the specific power consumption (specific power penalty) of the hybrid plant decreases with increasing the fresh water production. Especially at higher fresh water production, this specific power consumption was competitive to other desalination technologies such as reverse osmosis. The proposed hybrid solar tower-MED plant offers different benefits such as possibility of eliminating the cooling system requirement of the cycle as it can be replaced by the MED unit.

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