scholarly journals Investigation for additional head loss in helically coiled flexible pipe of a mobile fertigation system

2018 ◽  
Vol 10 ◽  
pp. 01001
Author(s):  
Aliaksandr Basareuski
Keyword(s):  
Pressure Loss ◽  
Energy Intensity ◽  
Specific Energy Consumption ◽  
Head Loss ◽  
Theoretical Studies ◽  
Pipeline Transport ◽  
Flexible Pipe ◽  
System Parameters ◽  
Output Ratio ◽  
Fertilizer System

One of the major parameters of a hydraulic machine is its energy intensity, i.e. its power/output ratio. This article presents the results of theoretical studies of the effects of additional head loss of transporting fluid through helically coiled flexible pipe on specific energy consumption of fertigation machinery and pipeline transport. Computational methods have been used to determine that pressure loss will be 15-20% higher on the average than the loss at a straight section, depending on the average radius of coil helix/design pipe diameter ratio. Correlations have been obtained that allow for justification of major mobile fertilizer system parameters based on the need to minimize pressure loss.

Injection moulding unit process for LCA: Energy intensity of manufacturing different materials at different scales

2016 ◽  
Vol 36 (5) ◽  
pp. 338-346 ◽  
Author(s):  
Franziska Hesser ◽  
Matthias Mihalic ◽  
Barbara J Paichl ◽  
Martina Wagner
Keyword(s):  
Injection Moulding ◽  
Energy Intensity ◽  
Process Analysis ◽  
Specific Energy Consumption ◽  
Development Phase ◽  
Environmental Aspects ◽  
Unit Process ◽  
Polypropylene Composites ◽  
Material Development ◽  
Ex Ante

It is not common to accompany material development by a Life Cycle Assessment (LCA) during the research and development phase. It is the aim of the study at hand to present environmental aspects of the manufacturing of different polypropylene composites by injection moulding in comparison to the neat polypropylene. The process analysis following two injection-moulding experiments revealed that the total specific energy consumption of injection moulding of seven different materials and on different scales ranges from 1.6 MJ/kg to 3.5 MJ/kg. On the level of an ex-ante LCA from cradle-to-factory gate, injection moulding can be rated from being a negligible to an important contributor.

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 ANALYSIS OF PRESSURE LOSS COMPONENTS IN AN INDUSTRIAL EXTRACT DUCT SYSTEM

2016 ◽  
Vol 22 (1) ◽  
Author(s):  
SODIKI JOHN IRISOWENGIBIA
Keyword(s):  
Pressure Loss ◽  
Ventilation System ◽  
Head Loss ◽  
Total Loss ◽  
Duct System ◽  
Branch Duct ◽  
Fan Selection

<p>The frictional head loss and the loss through fittings are computed for branch duct runs of an industrial extract ventilation system. Results show increases of both of the aforementioned loss components with increase in duct length. Furthermore, the fraction of the total loss due to fittings decreases from 0.60 to 0.45, with a corresponding increase of the fraction due to friction (from 0.40 to 0.55).Representative fractions of head loss components, obtained in the manner of this study, are shown to facilitate loss estimates and extract fan selection.</p>

scholarly journals INVESTIGATION OF VIBRATIONS OF A LIGHTWEIGHT GRATE ON ELASTIC SUPPORTS OF A COARSE LITTER CLEANER WITH RANDOM DISTURBANCE FROM RAW COTTON

2021 ◽  
pp. 49-53
Author(s):  
Orif Murodov ◽  
Shavkat Madrahimov ◽  
Ziyodullo Shodiyev
Keyword(s):  
Random Disturbance ◽  
Theoretical Studies ◽  
Stiffness Coefficient ◽  
Accidental Exposure ◽  
Elastic Supports ◽  
System Parameters ◽  
Plastic Pipes ◽  
Vibration Rate

The article discusses the results of theoretical studies of vibrations of a plastic grate on elastic supports of a coarse litter cleaner under accidental exposure to raw cotton. Graphical dependences of changes in displacements and vibration rate of the grate on changes in the coefficients of stiffness, dissipation and on the disturbing load from raw cotton at various values of the grate mass are constructed. Based on the analysis of the obtained graphical dependencies, the values of the system parameters are recommended. KEYWORDS: plastic grates, elastic supports, raw cotton, plastic pipes, mass, polyethylene, stiffness coefficient.

scholarly journals Calculation of Hydraulic Resistance in the Case of a Diffuser and a Confuser in a Horizontal Pipe

2021 ◽  
Vol 137 (6) ◽  
pp. 62-64
Author(s):  
A. M. Khurmamatov ◽  
◽  
G. B. Rakhimov ◽  
Keyword(s):  
Hydraulic Resistance ◽  
Pressure Loss ◽  
Head Loss ◽  
Sudden Expansion ◽  
Horizontal Pipe ◽  
Rate Of Increase ◽  
Inner Diameter

The main results of the calculation of the head loss with a smooth expansion and narrowing of the horizontal pipe, which has the following geometric dimensions; - the inner diameter of the pipe with a narrowing of 25 mm and an expansion of 50 mm. The pressure loss of the smooth expansion of the pipe at an oil velocity of 0.2–1.0 m/s has a smooth rate of increase from 0.002 to 0.032 m. With a smooth narrowing of the pipe, the head loss is from 0.0021 to 0.024 m. That, during the movement of oil in a horizontal pipe, the head loss with a sudden expansion is 1.33 times greater than that of a sudden narrowing.

Experimental Studies of Pressure Loss in Inclined Pipe in Slurry Transport for Subsea Mining

2015 ◽  
Author(s):  
Sotaro Masanobu ◽  
Satoru Takano ◽  
Tomo Fujiwara ◽  
Shigeo Kanada ◽  
Masao Ono
Keyword(s):  
Pressure Loss ◽  
Experimental Studies ◽  
Flexible Pipe ◽  
Mining System ◽  
Proposed Model ◽  
Mining Tool ◽  
Inclined Pipe ◽  
Lifting System ◽  
Slurry Transport ◽  
Inclined Pipes

For subsea mining, the estimation of pressure loss in the pipe of lifting system and the flexible pipe to connect the mining tool and the lifting system is important to design the mining system. The configuration of flexible pipe is expected to have an inclined part. In the present paper, the authors carried out the experiment to measure the pressure loss in inclined pipes using alumina beads to investigate the effect of inclination angle of pipe on the pressure loss. Furthermore, a mathematical model to estimate the pressure loss in inclined pipes was proposed and validated through the experiments. As the result of the validation, it was confirmed that the proposed model could be applied to the pressure loss estimation in inclined pipes.

Study on Hydraulic Transport of Large Solid Particles in Inclined Pipes for Subsea Mining

2017 ◽  
Vol 139 (5) ◽  
Author(s):  
Sotaro Masanobu ◽  
Satoru Takano ◽  
Tomo Fujiwara ◽  
Shigeo Kanada ◽  
Masao Ono ◽  
...  
Keyword(s):  
Pressure Loss ◽  
Solid Particles ◽  
Wall Friction ◽  
Hydraulic Transport ◽  
Flexible Pipe ◽  
Mining System ◽  
Horizontal Pipes ◽  
Inclination Angles ◽  
Lifting System ◽  
Inclined Pipes

For subsea mining, the prediction of pressure loss due to the hydraulic transport of solid particles in the flexible pipe to connect the mining tool and the lifting system is important for the design of mining system. The configuration of the flexible pipe is expected to have an inclined part. In the present paper, the authors developed a mathematical model to predict the pressure loss in inclined pipes. The total pressure loss is expressed by the summation of the loss due to a liquid single-phase flow and the additional loss due to the existence of solid particles. The additional pressure loss can be divided into the variation in static pressure due to the existence of solid particles, the loss due to the particle-to-pipe wall friction and collisions, and the loss due to the particle-to-particle collisions. The empirical formula in horizontal pipes proposed by the other researchers was applied to the model of the last two losses. Furthermore, we carried out the experiment on hydraulic transport of solid particles in a pipe. In the experiment, alumina beads, glass beads, and gravel were used as the solid particles, and the inclination angles of the pipe were varied to investigate the effect of the pipe inclination on the pressure loss. The calculated pressure loss using the model was compared with the experimental data. As the results of the comparison, it was confirmed that the developed model could be applied to the prediction of the pressure loss in inclined pipes.

scholarly journals Pressure loss reduction of pipe elements

2020 ◽  
Vol 15 (2) ◽  
pp. 489-493
Author(s):  
Gábor Gönczi
Keyword(s):  
Pressure Loss ◽  
Head Loss ◽  
Theoretical Research ◽  
Loss Reduction ◽  
Target Value ◽  
Discharge Pipe ◽  
Pipe Networks ◽  
Physical Experiments ◽  
Pump Station ◽  
Pump Stations

Abstract A theoretical research was conducted from 2016 to 2018 which aimed to reduce the head loss of pipe networks in the pump stations. The results were promising and predicted an average head loss reduction by 30%. Afterwards, physical experiments were carried out to test the effectiveness of the new pipe designs. Two new prototype pipe sections were installed into one of our pump stations. The experiment was successful as two unique pipe sections installed in the discharge pipe reduced the head loss of the pump station by 25–26%. According to these results, we can set a target value of 30% head loss reduction at full pump station pipe reconstruction.

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.

scholarly journals Theoretical study of the forced oscillation effect on subsoil tillage

2020 ◽  
Vol 193 ◽  
pp. 01028
Author(s):  
Ivan Masienko ◽  
Artem Vasilenko ◽  
Lyudmila Eranova
Keyword(s):  
Energy Intensity ◽  
Theoretical Study ◽  
Forced Oscillation ◽  
Theoretical Studies ◽  
Oscillation Effect ◽  
Resistance Reduction ◽  
Increase Productivity ◽  
Working Bodies ◽  
Electronic Elements

The work presents a tillage machine with vibrational electronic elements mounted on the working bodies, which allow reciprocal oscillating movements of the chisel bit and duckfoot shovels. Theoretical studies of the dependence of traction resistance reduction of a tillage machine on the influence of oscillations of the working bodies on the soil and on the unit’s speed. The oscillating movements of the working bodies will improve the quality of the main processing of heavy soils in gardens, reduce the energy intensity of a given process and increase productivity by increasing the unit’s speed.

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