Dust Collecting System for the Cleaning of Atmospheric Ventilation Emissions

2018 ◽  
Vol 878 ◽  
pp. 269-272 ◽  
Author(s):  
I.V. Stefanenko ◽  
V.N. Azarov ◽  
Natalia M. Sergina
Keyword(s):  
Dust Collector ◽  
System Efficiency ◽  
Balance Equations ◽  
System Operation ◽  
Full Factorial Experiment ◽  
Second Stage ◽  
Full Factorial ◽  
Additional Device ◽  
Collecting System ◽  
Swirled Flows

The paper gives a description of a dust collecting system for the cleaning of atmospheric ventilation emissions. The system includes two successively installed vortex dust collectors with countercurrent swirled flows. The exhaust is organized from the first-stage hopper. After the cleaning in the additional device of the same design, the exhaust dust-air mixture is delivered to the lower inlet of the second-stage dust collector. The forecast evaluation of the system efficiency was carried out on the basis of the solution of balance equations for dust flows. The experimental evaluation of the system efficiency was carried out in industrial conditions on the basis of the full factorial experiment. The dependence characterizing the efficiency of the suggested system was obtained on the basisof the investigation results, and the most rational modes of the system operation were determined.

Principles of exposure of polymer materials to heat, moisture and UV-radiation and study of their properties by full factorial experiment: A review

2021 ◽  
pp. 146-160
Author(s):  
A. B. Laptev ◽  
A. S. Nesterov ◽  
A. M. Vardanyan ◽  
A. M. Vardanyan
Keyword(s):  
Uv Radiation ◽  
Climatic Factors ◽  
Initial Period ◽  
Amorphous State ◽  
Surface Oxidation ◽  
Polymer Chains ◽  
Factorial Experiment ◽  
Polymer Materials ◽  
Full Factorial Experiment ◽  
Full Factorial

The work is dedicated to the effects of climatic factors on polyethylene terephthalate (PET) in terms of changes in the structure and interaction of polymer molecules. The kinetic concept of the strength of PET has been developed, and the factors influencing the strength have been considered. Effects of moisture, thermal oxidative destruction, and UV-radiation on the structure of PET have been investigated. Polymers’ properties predicting, durability and their computer modeling have been analyzed. A model of changes in PET properties under the influence of temperature, moisture and UV-radiation was constructed using the methods of a full factorial experiment. It has been shown that in the initial period of exposure, adsorption and diffusion of moisture, hydrolysis and surface oxidation occur; prolonged and constant exposure to UV-radiation break the bonds formed by moisture, then the C–C and C–O bonds in the PET molecule brake and new intermolecular bonds are formed. In the amorphous state of PET, the breaking of bonds in the polymer chain and the formation of bonds between two adjacent polymer chains, the formation of more densely packed nodes, the destruction of the polymer and its aging, are equally probable. Temperature has a secondary effect, facilitating both hydrolysis and oxidation and polymer degradation.

scholarly journals The influence of technological parameters for the production of plasticized polyvinylbutyral films on their optical and physico-mechanical properties

2019 ◽  
pp. 7-8
Author(s):  
M. M. Egorov ◽  
V. I. Milov ◽  
M. K. Timin ◽  
T. P. Mukhina ◽  
V. S. Smirnov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mathematical Analysis ◽  
Polyvinyl Butyral ◽  
Factorial Experiment ◽  
Regression Equations ◽  
Technological Parameters ◽  
Full Factorial Experiment ◽  
Effect Of Pressure ◽  
Direct Pressing ◽  
Full Factorial

The effect of pressure, temperature and time during direct pressing on the strength and optical characteristics of adhesive plasticized polyvinyl butyral films is studied. A mathematical analysis of the results of a full factorial experiment is carried out and the regression equations are derived.

scholarly journals Influence of application parameters of ultrasonic-assisted bone instruments on the tear force of a substitute material for spinal dura mater

2018 ◽  
Vol 4 (1) ◽  
pp. 611-614
Author(s):  
Marie C. Foelkel ◽  
Vitali Herzog ◽  
Markus Meier ◽  
Michael M. Morlock
Keyword(s):  
Dura Mater ◽  
Spinal Surgery ◽  
Nerve Tissue ◽  
Cnc Machine ◽  
Full Factorial Experiment ◽  
Critical Areas ◽  
Ultrasonic Assisted ◽  
Substitute Material ◽  
Dural Tears ◽  
Full Factorial

AbstractAn ultrasonic-assisted bone instrument can be used for the dissection of bone in spinal surgery. During surgery, the tip of such a bone instrument can touch spinal dura mater. Especially during critical re-operations, high forces can be unintentionally applied on spinal dura mater. To prevent dural tears, the influence of application parameters on the tear force shall be analyzed. Collagen foil is used as a substitute material for spinal dura mater because of its similar mechanical properties and structure. Sponge cloth is placed below collagen foil to imitate cerebrospinal fluid and nerve tissue. A 3-axis CNC-machine is used to automate the movement of the bone instrument. In a full factorial experiment the influence of amplitude, shape of movement and velocity of movement on the tear force is analyzed. Amplitude has the strongest effect because of the increase in input energy. Velocity also has a significant influence, probably because of the strain rate increasing with velocity. Thus, a surgeon should mainly reduce the amplitude and furthermore the velocity of movement to generate higher safety in critical areas.

Bonding Strength and Microstructure of SnAg-Based Solid Liquid Inter-Diffusion Bonds

2009 ◽  
Author(s):  
Leila J. Ladani ◽  
Jafar Razmi
Keyword(s):  
Ternary System ◽  
Process Parameters ◽  
New Technology ◽  
Full Factorial Experiment ◽  
3 Dimensional ◽  
Diffusion Bonds ◽  
Pressure Time ◽  
Solid Liquid ◽  
Full Factorial ◽  
Melting Material

Solid Liquid Inter-diffusion (SLID) is a new technology used as interconnects in high density and 3 dimensional packages. This manuscript investigates effect of process parameters, pressure, time and temperature on the strength of bonds and microstructure produced using this technology. A full factorial experiment is designed and implemented on the process with these 3 variables at 3 levels using Sn3.5Ag. Bonds’ strength were then measured using a micro-tester and load displacements were monitored. This analysis shows that SLID bonds form at temperatures much higher than melting temperature of the low melting material. It also shows that time is a significant factor. Bonds that are formed under 10 minutes of time do not show a significant amount of intermetallics. Although the elemental percentage of copper is high in the middle of the bond, it does not reach enough to form any of intermetallic compounds of this ternary system. The specimens fabricated under longer time around 1 hour showed a more brittle, intermetallic like behavior.

Study of cadmium adsorption onto calcite using full factorial experiment design

2017 ◽  
Vol 83 ◽  
pp. 222-233 ◽  
Author(s):  
Sabah Hajji ◽  
Thouraya Turki ◽  
Ali Boubakri ◽  
Mohamed Ben Amor ◽  
Nadia Mzoughi
Keyword(s):  
Experiment Design ◽  
Factorial Experiment ◽  
Full Factorial Experiment ◽  
Cadmium Adsorption ◽  
Full Factorial

Theoretical performance of transcritical carbon dioxide cycle with two-stage compression and intercooling

2005 ◽  
Vol 219 (2) ◽  
pp. 187-195 ◽  
Author(s):  
J. S. Baek ◽  
E. A. Groll ◽  
P. B. Lawless
Keyword(s):  
Carbon Dioxide ◽  
System Analysis ◽  
Coefficient Of Performance ◽  
System Efficiency ◽  
Compression Process ◽  
Two Stage ◽  
Bell Curve ◽  
Second Stage ◽  
Transcritical Carbon Dioxide ◽  
Theoretical Performance

A computer model was developed to perform a thermodynamic analysis of the transcritical carbon dioxide cycle with two-stage compression and intercooling. In typical two-stage compression with intercooling applications, the intercooler serves the purpose of cooling the fluid to the lowest possible temperature before it enters the second-stage compressor. This paper presents the results of the system analysis of the transcritical carbon dioxide cycle with two-stage compression and intercooling (intercooler cycle) and identifies the pressure ratios that provide maximum system efficiency. The results show that the coefficient of performance (COP), curves of the intercooler cycle are different from the ‘typical bell curve behaviours’ that are observed when plotting the COP versus the intermediate pressure with assumptions of isentropic and real compression process.

Improvement of Surface Roughness on ABS 400 Polymer Using Design of Experiments (DOE)

2007 ◽  
Vol 561-565 ◽  
pp. 2389-2392 ◽  
Author(s):  
Daniel Horvath ◽  
Rafiq Noorani ◽  
Mel Mendelson
Keyword(s):  
Surface Roughness ◽  
Fused Deposition Modeling ◽  
Factorial Experiment ◽  
Full Factorial Experiment ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
Full Factorial ◽  
Model Temperature ◽  
Three Factor ◽  
Significant Factors

The objective of this research was to find the best combination of factor levels that minimized the surface roughness of prototyped samples from Fused Deposition Modeling (FDM). Two sets of experiments were conducted for that purpose; a two-level three-factor full factorial experiment and a three-level two-factor full factorial experiment. The parameters chosen for this research were model temperature, layer thickness and part fill style. The results obtained from both experiments were compared and analyzed in order to determine the best combination of factors that minimized the surface roughness of the specimens. The significant factors, their interactions and the optimum setting are presented in this paper

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