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

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.

2021 ◽  
Vol 303 ◽  
pp. 01034
Author(s):  
Ivan Panachev ◽  
Ilya Kuznetsov ◽  
Anastasia Shirokolobova

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.


2020 ◽  
Vol 193 ◽  
pp. 01071
Author(s):  
Andrey Pavlushin ◽  
Sergey Sutyagin ◽  
Galina Karpenko ◽  
Vadim Artemiev

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.


2019 ◽  
Vol 4 (2) ◽  
pp. 90-102
Author(s):  
O. E. Shabaev ◽  
P. P. Zinchenko ◽  
A. V. Meznikov

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.


10.5219/1407 ◽  
2020 ◽  
Vol 14 ◽  
pp. 633-640
Author(s):  
Kyrylo Samoichuk ◽  
Dmytro Zhuravel ◽  
Nadiya Palyanichka ◽  
Vadim Oleksiienko ◽  
Serhii Petrychenko ◽  
...  

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.


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.


2020 ◽  
pp. 78-82
Author(s):  
Sergey Ivanovich Kambulov ◽  
Igor Vladimirovich Bozhko

The article presents the results of experimental studies of the aggregate of tillage combined APK-4. During the research it was found that in terms of quality indicators, the unit at a working speed of 9.8 km/h withstands an installation processing depth of 12-14 cm. According to energy indicators, the traction resistance of the APK-4 machine in the unit with the K-701 tractor was 48.2 kN, and the specific energy consumption amounted to 123.5 MJ/ha. According to operational and technological indicators, the productivity per hour of the main time is 3.82 ha with the operating speed of the unit 2.72 m/s (9.8 km/h). The replaceable productivity in this case amounted to 2.10 ha/h, while the operational productivity of the unit at the same time amounted to 2.07 ha/h.


Author(s):  
Juan Espindola ◽  
Farah Nazifa Nourin ◽  
Mohammad D. Qandil ◽  
Ahmad I. Abdelhadi ◽  
Ryoichi Samuel Amano

Author(s):  
Д.В.  Бастриков ◽  
Ю.Н. Власов ◽  
Д.А. Ильюшенко ◽  
С.В. Кучер

Настоящая статья посвящена экспериментальному определению закономерности для оценки затрат энергии, требующейся для измельчения отходов окорки сосны в зависимости от степени измельчения и их относительной влажности. При проведении исследований использованы методы планирования эксперимента и обработки опытных данных, методы математического анализа. Рассмотрены три приближённых закона измельчения, представленных в технической литературе, структура которых легла в основу плана эксперимента второго порядка. В опытах использовали три группы относительной влажности экспериментального материала: отходы непосредственно после окорки на роторном станке (влажность около 70%), подсушенные на воздухе (влажность около 40%) и высушенные в сушильной камере (влажность около 10%). Предварительная сепарация материала проводилась на установке АЛГМ-3. Отбирали отходы таким образом, чтобы средняя крупность кусков до измельчения составляла приблизительно 70, 50 и 30 мм. Отобранные пробы измельчали в промышленном измельчителе Erdwich M600/1-400. Во время работы измельчителя фиксировались данные о потребляемой силе тока; работу, совершенную во время измельчения материала, рассчитывали по зафиксированным данным о потребляемой силе тока при известном напряжении в сети. После измельчения определялась средняя крупность обработанной пробы, далее рассчитывалась степень измельчения. По результатам обработки экспериментальных данных по измельчению отходов окорки установлено, что удельная энергоемкость измельчения отходов окорки сосны связана с относительной влажностью отходов окорки и степенью их измельчения зависимостью, повторяющей структуру закона измельчения Кирпичева-Кика. Показано, что относительная влажность измельчаемой коры, оптимальная по соотношению теплоты сгорания сухого вещества, содержащегося в продукте измельчения коры сосны («энергетическая стоимость»), и энергии, затраченной на ее измельчение («энергетическая себестоимость»), составляет 27%. Показано, что удельная энергоемкость измельчения отходов окорки сосны при оптимальной влажности пропорциональна натуральному логарифму степени измельчения. При оптимальной влажности для измельчения отходов окорки сосны в 5–15 раз потребуется затратить энергию, составляющую 7–14% теплоты сгорания. В заключение отмечена перспективность дальнейших экспериментальных исследований с целью детального анализа энергоемкости дробления отходов окорки других пород древесины. This article devoteы to experimental determination of patterns to assess the energy consumption required for pine debarking waste shredding, depending on the shredding ratio and the humidity. The research uses methods of experiment planning and processing of experimental data, methods of mathematical analysis. We consider three approximate shredding law patterns presented in technical literature, the structure of which forms the basis of the second order experimental design. The experiments tested three experimental groups of the material relative humidity: waste immediately after rotary machine debarking (relative humidity about 70%), dried in air (relative humidity about 40%) and dried in an oven (relative humidity about 10%). Pre-separation of the material was carried out on the ALGM-3-set in order to collect the waste into three groups by average particle size of the pieces before shredding (approximately 70, 50 and 30 mm). After the pre-separation, the samples were ground in an industrial shredder Erdwich M600/1-400. During the operation, the shredder’s chopper recorded data on the consumption of the current strength, the work done during the shredding was calculated from the recorded data on the consumption of amperage at a certain voltage in the network. After the shredding, the average particle size was determined by the treated samples, and then calculated the shredding ratio. According to the results of experimental data on debarking waste shredding processing, the paper establishes that the specific energy consumption of pine debarking waste shredding associates with the relative humidity of the waste and the shredding ratio in a mathematical model, which follows the structure of Kirpichev-Kik law. The experimental data processing shows that the caloric value of dry matter contained in the shredding product, and the energy expended in its shredding, link each other as a nonlinear function of the bark humidity with optimal humidity of 27%. The results also show that the specific energy consumption of pine debarking waste shredding of at the optimum humidity is proportional to the natural logarithm of the shredding ratio. At optimal humidity for shredding pine debarking waste in 5–15 times it is needed to expend energy, which is 7–14% of the waste calorific value. In conclusion, the paper prospects that further experimental studies should be focused on detailed analysis of energy consumption of other wood species waste debarking shredding.


SINERGI ◽  
2016 ◽  
Vol 20 (1) ◽  
pp. 9
Author(s):  
Alfa Firdaus ◽  
M Syamsul Ma’arif

There is currently no standard for the Specific Energy Consumption (SEC) in the palm oil industry. SEC is a value that can be used as an indicator to measure the optimization level in the use of energy. Indonesia as one of the largest palm oil producing countries requires a standard for energy intensity in the palm oil industry. SEC in palm oil mill is defined in the amount of energy per unit of production (kWh/kg). The classifying method that has been used in this study is K-means cluster analysis with the measurement samples in 14 palm oil mills for 12 months of period. This study has suggested the SEC standard for Indonesian palm oil industry and it is expected to be SEC reference for other studies in the palm oil industry.


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