scholarly journals Physical, technological and technical characteristics of the blasted rock mass in terms of energy intensity of the processes

2021 ◽  
Vol 303 ◽  
pp. 01034
Author(s):  
Ivan Panachev ◽  
Ilya Kuznetsov ◽  
Anastasia Shirokolobova
Keyword(s):  
Rock Mass ◽  
Energy Consumption ◽  
Specific Energy ◽  
Energy Intensity ◽  
Coal Mines ◽  
Specific Energy Consumption ◽  
Rock Blasting ◽  
Mining Equipment ◽  
The Relationship

Kuzbass coal mines are equipped with powerful mining equipment; it is CME excavator type with bucket capacity from 4.6 m3 to 20 m3. To evaluate the efficiency of the excavation processes, a universal criterion was used – the value of specific energy consumption (kW h/m3). The dependences of excavator efficiency on the quality of rock blasting, estimated by the diameter of the average piece in the shot pile, are obtained. The relationship between the efficiency of excavators CME - 4.6, CME – 8, CME – 12.5, CME – 20, their energy intensity and the diameter of an average piece in the shot pile is determined.

Research of extrusion’s process of feed-stuff for fish

10.12737/6503 ◽  
2014 ◽  
Vol 9 (3) ◽  
pp. 95-97 ◽  
Author(s):  
Рудой ◽  
Dmitriy Rudoy
Keyword(s):  
Energy Consumption ◽  
Specific Energy ◽  
Energy Intensity ◽  
Specific Energy Consumption ◽  
Experimental Studies ◽  
Screw Extruder ◽  
Temperature And Humidity

This article discusses a study of extrusion’s process of feed-stuff for fish on the developed two-screw extruder. The main technological requirements of fodder-stuff for fish was determined. The results of experimental studies were described, the relation of the specific energy consumption of the temperature and humidity of feed-stuff was defined. The obtained results show that the specific energy intensity of the two-screw extruder is lower than with other devices for the production of fodder-stuff for fish.

scholarly journals Reconstruction of Turbomachines on the Basis of the Flow Structure Visual Diagnostics

2020 ◽  
Vol 22 (2) ◽  
pp. 405-414
Author(s):  
Vasyl Arsiri ◽  
Oleg Kravchenko
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Flow Structure ◽  
Specific Energy ◽  
Specific Energy Consumption ◽  
Dynamic Processes ◽  
Hydraulic Efficiency ◽  
Different Types ◽  
Increase In Productivity

AbstractThe indicator of the quality of modern turbomachines is only the coefficient of efficiency, which characterizes the ratio of the useful work of compressors or fans to the energy expended on the drive. For the analysis of the quality of the motion, processes in flow parts, the values of resistances are used which are difficult to be considered as an indicator of the efficiency of dynamic processes. The report presents the results of visual diagnostics of the structure of flows during the movement in the elements of turbomachines, as well as options for improving the geometry of the flow parts - in the inlet pipes, impellers.For the analysis of the efficiency of the motion of liquids and gases in flowing parts, a calculated index is proposed - the coefficient of hydraulic efficiency of dynamic processes. The joint use of two indicators - the efficiency of transformation of different types of energy (efficiency of turbomachines) and the efficiency of dynamic processes in flowing parts allows us to develop and to analyze the results of reconstruction of turbomachines. Reconstruction of turbomachines with the purpose of improving the geometry of the flow parts provides an increase in productivity of turbines, compressors, fans and pumps, while reducing the specific energy consumption for the processes of compression and transport of liquids and gases. Optimization of turbomachines flow parts based of flow structure visual diagnostics allows to reduce noise and vibration, as well as to solve other problems.

scholarly journals Energy efficiency in the zeolite impact crushing plant of San Andrés (Holguín, Cuba)

DYNA ◽  
2015 ◽  
Vol 82 (193) ◽  
pp. 93-97
Author(s):  
José Ramón Hechavarría-Pérez ◽  
Alfredo L. Coello-Velazquez ◽  
Fernando Daniel Robles Proenza ◽  
Juan María Menendez-Aguado
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Specific Energy ◽  
Specific Energy Consumption ◽  
Operational Parameters ◽  
Impact Crushing ◽  
San Andres ◽  
Crushing Plant ◽  
The Impact ◽  
The Relationship

The present work deals with the impact crusher energy efficiency at San Andres Zeolitic Plant. Varying the operational parameters levels (rotor velocity, hammer row number and crusher capacity) were carried up two experimental series: First series was aimed to obtain the influence of the operational parameters on the power consumed by the crusher motor; the second series evaluated the crusher specific energy consumption behavior. First series empirical model obtained describes the influence of operational parameters on power consumption. Also the relationship among specific energy consumption and crusher speed and capacity were obtained. The most efficient operational regimen corresponded to 1100 rpm of the rotor velocity, 2 hammer row numbers and 15 t/h of crusher capacity.

scholarly journals Experimental Studies of Effect of Shearer Auger Operating Device Effective Width on Effectiveness of Loading Process

2019 ◽  
Vol 4 (2) ◽  
pp. 90-102
Author(s):  
O. E. Shabaev ◽  
P. P. Zinchenko ◽  
A. V. Meznikov
Keyword(s):  
Rock Mass ◽  
Energy Consumption ◽  
Specific Energy ◽  
Feed Rate ◽  
Specific Energy Consumption ◽  
Experimental Studies ◽  
Adaptive Method ◽  
Operating Conditions ◽  
Effective Width ◽  
Actual Operating

Intensification of coal mining from mine seams of 0.55–1.20 m thick requires increasing efficiency of loose coal loading that may be achieved by selecting the optimal parameters of auger operating device of a shearer. The most reliable way to determine effect of the auger parameters on the energy parameters of the shearer operation is experimental research in actual operating conditions. As the subjects of the research, we selected up-to-date UKD400 and UKD200-500 shearers, operating in representative conditions of the Krasny Partizan mine of SE SVERDLOVANTRATSIT and Ternovskaya mine of DTEK PAVLOGRADUGOL PJSC. An adaptive method for specific mining operating conditions is proposed for determining the specific energy consumption of the shearers on material disruption and loading for thin seams in actual operating conditions based on fixing the values of currents of the cutting drive motors. Based on processing of the experimental data, an indicative dependence of the power for rock mass loading on the feed rate and the effective width of the operating device is determined. Increasing the auger effective width results in increasing the loading power and specific energy consumption. At the same time, the higher the shearer feed rate, the greater the growth of the loading power and specific energy consumption. This is due to the beginning of the process of loose rock mass circulation, and the larger the auger effective width, the more intensive the circulation process, and at the lower feed rate of the shearer the process starts. A method is proposed for selecting the auger optimum effective width based on the criteria of minimum specific energy consumption and maximum commercial productivity.

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 of a Moringa oleifera seed shelling machine

2020 ◽  
Vol 66 (No. 3) ◽  
pp. 104-111
Author(s):  
Oluwaseyi Fadele ◽  
Ademola Afolabi ◽  
Dolapo Oloyede ◽  
Olufemi Adedire ◽  
Hafsat Bankole ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Specific Energy ◽  
Moringa Oleifera ◽  
Specific Energy Consumption ◽  
Large Seed ◽  
The Relationship ◽  
Moringa Oleifera Seed

In this work, the Specific Energy Consumption (SEC) and machine capacity for a Moringa oleifera seed shelling machine were determined in relation to the cylinder speed and seed sizes. A M. oleifera seed shelling machine was tested and the SEC was appraised. The SEC and machine capacity of the M. oleifera seed shelling machine were determined at five speed levels, viz. 200, 240, 280, 320 and 360 rpm using three seed sizes (viz. small, medium and large seed sizes). The SEC and machine capacity increased with the seed sizes during the shelling process. The same trend was observed for the relationship between the SEC and cylinder speed. The minimum values obtained for the SEC using the small, medium and large M. oleifera seed sizes were 31.25, 40.07 and 54.22 Wh·kg<sup>–1</sup>, respectively, at a cylinder speed of 200 rpm while the maximum values obtained for the small, medium and large seed sizes were 58.01, 74.37 and 100.63 Wh·kg<sup>–1</sup>, respectively, at a cylinder speed of 360 rpm. The optimum values obtained for the machine capacity were 14.58, 11.38 and 8.41 kg×h<sup>–1</sup> using the small, medium and large seed sizes, respectively. Conclusively, this study shows that the SEC and machine capacity were affected by the variation in the cylinder speed and seed sizes.

scholarly journals On the energy intensity of driving and the bearing capacity of models of pyramidal-prismatic piles

2020 ◽  
Vol 77 (3) ◽  
pp. 101-110
Keyword(s):  
Energy Consumption ◽  
Bearing Capacity ◽  
Specific Energy ◽  
Energy Intensity ◽  
Specific Energy Consumption ◽  
Energy Costs ◽  
Static Tests ◽  
Laboratory Conditions ◽  
And Behavior

The article presents the results of driving and static tests of pile models with different longitudinal shapes, carried out in laboratory conditions. It was revealed that the specific energy consumption of driving a pyramidal-prismatic pile can either exceed or be less than the specific energy consumption of driving a prismatic pile. Unlike pyramidal piles, pyramidal-prismatic piles have less specific energy consumption for driving. Energy costs for driving pyramidal-prismatic piles, as well as their resistance to pressing vertical loads depend on the length of the pyramidal section and rise with its increase. It has been established that, with the same depth of driving and with the same piles, the specific bearing capacity of the pyramidal-prismatic piles is higher than the prismatic piles and less than the pyramidal pile. The revealed features of the behavior of the pyramidalprismatic piles are due to the influence of the longitudinal shape and the length of the pyramidal part of their shaft on the driving process and behavior under the loads.

ENERGY SAVING ANALYSIS USING ENERGY INTENSITY USAGE AND SPECIFIC ENERGY CONSUMPTION METHODS

2021 ◽  
Vol 22 (1) ◽  
pp. 15-29
Author(s):  
Juan Espindola ◽  
Farah Nazifa Nourin ◽  
Mohammad D. Qandil ◽  
Ahmad I. Abdelhadi ◽  
Ryoichi Samuel Amano
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Specific Energy ◽  
Energy Intensity ◽  
Specific Energy Consumption
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