scholarly journals Studies of a Rotary–Centrifugal Grain Grinder Using a Multifactorial Experimental Design Method

2019 ◽  
Vol 11 (19) ◽  
pp. 5362 ◽  
Author(s):  
Marczuk ◽  
Blicharz-Kania ◽  
Savinykh ◽  
Isupov ◽  
Palichyn ◽  
...  
Keyword(s):  
Experimental Design ◽  
Design Method ◽  
Technical Condition ◽  
Technical Literature ◽  
Optimization Criteria ◽  
Impact Cutting ◽  
Experimental Design Method ◽  
Dust Fraction ◽  
Experimental Design Methodology

A scientific and technical literature review on machines designed to grind fodder grain revealed that the existing designs of grinding machines—those based on destruction by impact, cutting, or chipping—have various drawbacks. Some disadvantages include high metal and energy intensity, an uneven particle size distribution of the ground (crushed) product, a high percentage of dust fraction, the rapid wear of work tools (units), and heating of the product. To eliminate most of the identified shortcomings, the design of a rotary–centrifugal grain grinder is proposed in this paper. The optimization of the grinder’s working process was carried out using experimental design methodology. The following factors were studied: the grain material feed, rotor speed (rpm), opening of the separating surface, number of knives (blades) on the inner and outer rings, technical conditions of the knives (sharpened or unsharpened), and the presence of a special insert that is installed in the radial grooves of the distribution bowl. The optimization criteria were based on the amount of electricity consumed by and the performance of the rotary–centrifugal grain grinder. The quality of performance was quantified by the finished product, based on the percentage of particles larger than 3 mm in size. An analysis of the results of the multifactorial experiment allowed us to establish a relationship (interaction) between the factors and their influence on the optimization criteria, as well as to determine the most significant factors and to define further directions for the research of a centrifugal–rotary grain grinder. From our experimental results, we found that the grinder is underutilized in the selected range of factor variation. Furthermore, the number of knives installed at the second stage of the grinder, the gap (clearance) of the separating surface, and the technical condition of the knives are among the most important factors influencing the power consumption and the quality of the resulting product. A reduction in the number of knives at the first stage has a positive effect on all the selected optimization criteria; and by varying the factors in the selected range, it is possible to obtain a product corresponding to medium and coarse grinding.

scholarly journals Modeling using experimental design method of the physicochemical parameters of the water quality in Meknes city, Morocco

2020 ◽  
Vol 150 ◽  
pp. 01005
Author(s):  
Ghariba Bouazza ◽  
Mohammed Assou ◽  
Salah Souabi ◽  
El Houssine Chatri
Keyword(s):  
Drinking Water ◽  
Experimental Design ◽  
Physicochemical Parameters ◽  
Design Method ◽  
Residual Chlorine ◽  
Experimental Design Method ◽  
Series Of Experiments ◽  
Experimental Design Methodology

This study was focused on the characterization of physicochemical parameters of drinking water, which are mainly involved during water treatment or analysis processes. we were interested in the application of the experimental design methodology, according to the method of Yates on the parameters that characterize the quality of drinking water in Meknes, Morocco. Six factors have been identified to control this quality. The influence of these parameters on the responses accommodated at the exit was highlighted. The derivation of a theoretical model has been realized and a series of experiments was performed. The analysis of our results, based on a statistical approach, was presented and the parameters that have a significant influence on the outputs have been identified. From these results, we can conclude that the input factors such as hardness, pH, conductivity, residual chlorine and turbidity have a large influence on measured output response (pHs). Moreover, the theoretical and experimental results are very convergent which validate our studied model.

scholarly journals Development Parameters of Pneumatic Slotted Sprayers for Treatment Potato Tubers

2019 ◽  
Vol 9 (2) ◽  
pp. 1200-1203
Keyword(s):  
Experimental Design ◽  
Design Method ◽  
Working Fluid ◽  
Potato Tubers ◽  
Flow Rates ◽  
Financial Costs ◽  
Experimental Design Method ◽  
Potato Planter ◽  
Spray Gun

This article presents the results of developing the design of the device and optimizing the parameters of the pneumatic slotted spray gun recommended for treating tubers with working fluids. In connection with the task, the flow rates of the working fluid by the sprayer were determined by the experimental design method and the speed characteristics of the airborne droplet for treating tubers in the coulters of a potato planter. It was found that the use of a device for processing tubers during the planting process contributes to the intensification of the cultivation of tubers while reducing financial costs and improving the quality of processing.

Optimization of Epoxy Composite on Thermal Decomposition Utilizing Experimental Design Method

2013 ◽  
Vol 459 ◽  
pp. 40-45
Author(s):  
Huey Ling Chang ◽  
Chih Ming Chen ◽  
Cheng Ho Chen
Keyword(s):  
Thermal Decomposition ◽  
Experimental Design ◽  
Epoxy Resin ◽  
Design Method ◽  
Analytical Formula ◽  
Decomposition Temperature ◽  
Analysis Technique ◽  
Experimental Design Method ◽  
Experimental Design Methodology ◽  
Composite Samples

In this study, the Taguchi experimental design methodology is used to optimize the composition of a nanopowder/epoxy resin material comprising Al2O3, SiO2, carbon black nanopowders, epoxy resin and diluent. A Taguchi orthogonal array is employed in planning the configuration of the samples for the experiment. The signal-to-noise (S/N) ratios, and the variances are analyzed. The thermal decomposition temperature of the nanocomposite with optimum composition increased 37.16°C (increased by 12.5%) compared to pure epoxy. The experimental data generated in the Taguchi trials are processed using a regression analysis technique in order to derive an analytical formula relating the composition of the composite samples to their thermal properties. It is shown that the results obtained using the analytical formula are in good agreement with the experimental observations with only 1.95% error.

scholarly journals Treatment of bedsores-Combination of therapies depended the experimental design method-

2005 ◽  
Vol 42 (1) ◽  
pp. 90-98
Author(s):  
Hiroko Miyaji ◽  
Hirofumi Sakurai ◽  
Masayuki Kikawada ◽  
Katsuhiko Yamaguchi ◽  
Akihiro Kimura ◽  
...  
Keyword(s):  
Experimental Design ◽  
Design Method ◽  
Experimental Design Method

scholarly journals Optimal design for the dual slot die in melt blowing process

2014 ◽  
Vol 18 (5) ◽  
pp. 1714-1715
Author(s):  
Li-Li Wu ◽  
Ting-Ting Cheng ◽  
Chuan Xu ◽  
Ting Chen
Keyword(s):  
Experimental Design ◽  
Optimal Design ◽  
Flow Field ◽  
Design Method ◽  
Air Flow ◽  
Variance Analysis ◽  
Orthogonal Experimental Design ◽  
Melt Blowing ◽  
Experimental Design Method ◽  
Slot Die

The parameters of the dual slot die in an industrial melt blowing equipment are designed optimally using the orthogonal experimental design method. The air flow fields of different die parameters are simulated. Effects of the die parameters are analyzed using variance analysis. The results show that the inset distance and slot width have significant effects on the air flow field while effect of the slot angle is unremarkable.

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