Disperse powder material layer vibrational fluidization state modeling with a view to describe dry concentration processes

2016 ◽  
pp. 21-24
Author(s):  
L. A. Vaisberg ◽  
◽  
K. S. Ivanov ◽  
I. V. Demidov ◽  
◽  
...  
Keyword(s):  
Powder Material ◽  
Disperse Powder ◽  
Material Layer

SIFAT FISIS MEKANIS BAMBU LAPIS SEBAGAI BAHAN BAKU PRODUK INTERIOR

2011 ◽  
Vol 3 (1) ◽  
pp. 15
Author(s):  
Arhamsyah Arhamsyah
Keyword(s):  
Flexural Strength ◽  
Water Content ◽  
Raw Material ◽  
Technical Aspects ◽  
Material Layer ◽  
Weight Variation

Research on the utilization of bamboo as a raw material layer interior products have been made. This research aims to determine the nature of plybamboo in terms of technical aspects / processes of manufacture, physical and mechanical, the influence of weight variation labur adhesive, adhesive types and kinds of bamboo products plybamboo.This type of bamboo used is sweet bamboo (Gigantochloa atter Kurz) and bamboo lear (Gigantochloa apus Kurz).The adhesive used was adhesive Polyvinil Acetat (PVAc) and Chloroprene with adhesive labur weight each - each 150 gr/m2, 200 gr/m2 and 250 gr/m2. The parameters tested were water content, density, flexural strength of dry and delamination.The results showed that the treatment using bamboo material with adhesive Chloroprene sweet heavy labur 250 gr/m2 produce the best plybamboo.Keywords: bamboo, glue, physical, mechanical

scholarly journals Numerical Modeling and Performance Evaluation of Standing Wave Thermoacoustic Refrigerators with a Multi-Layered Stack

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4360
Author(s):  
Umar Nawaz Bhatti ◽  
Salem Bashmal ◽  
Sikandar Khan ◽  
Rached Ben-Mansour
Keyword(s):  
Standing Wave ◽  
Numerical Study ◽  
Temperature Drop ◽  
Acoustic Power ◽  
Heat Energy ◽  
Coefficient Of Performance ◽  
Material Layer ◽  
And Performance ◽  
Stacked Material ◽  
Thermoacoustic Refrigerators

Thermoacoustic refrigerators have huge potential to replace conventional refrigeration systems as an alternative clean refrigeration technology. These devices utilize conversion of acoustic power and heat energy to generate the desired cooling. The stack plays a pivotal role in the performance of Standing Wave Thermoacoustic Refrigerators (SWTARs), as the heat transfer takes place across it. Performance of stacks can be significantly improved by making an arrangement of different materials inside the stack, resulting in anisotropic thermal properties along the length. In the present numerical study, the effect of multi-layered stack on the refrigeration performance of a SWTAR has been evaluated in terms of temperature drop across the stack, acoustic power consumed and device Coefficient of Performance (COP). Two different aspects of multi-layered stack, namely, different material combinations and different lengths of stacked layers, have been investigated. The combinations of four stack materials and length ratios have been investigated. The numerical results showed that multi-layered stacks produce lower refrigeration temperatures, consume less energy and have higher COP value than their homogeneous counterparts. Among all the material combinations of multi-layered stack investigated, stacks composed of a material layer with low thermal conductivity at the ends, i.e., RVC, produced the best performance with an increase of 26.14% in temperature drop value, reduction in the acoustic power consumption by 4.55% and COP enhancement of 5.12%. The results also showed that, for a constant overall length, an increase in length of side stacked material layer results in an increase in values of both temperature drop and COP.

Effective Porosity Comparison with a Lime Mortar Matrix Base during 350 to 700 Days

2017 ◽  
Vol 902 ◽  
pp. 60-64
Author(s):  
Judith Alejandra Velázquez Perez ◽  
Wilfrido Martínez Molina ◽  
Hugo Luis Chávez García ◽  
Elia Mercedes Alonso Guzmán ◽  
Rosalía Ruiz Ruiz
Keyword(s):  
Powder Material ◽  
Effective Porosity ◽  
Capillary Absorption ◽  
Powder Materials ◽  
Maize Starch ◽  
Lime Mortar ◽  
Historical Sites ◽  
Matrix Base ◽  
Weight Proportion ◽  
Mortar Matrix

This research is an investigation about the use of powder material additions with mortars lime base for a possible implementation in construction and/or restoration of historical sites. Mortars were elaborated in laboratory conditions with a 1:2.5 in weight proportion. One of the proofs to which these mortars were submitted was the test of capillary absorption; this way, the influence of the materials added to powder in these mortars determined porosity. Mortars were made with different percentages of materials. These powder materials are brick manufacturing ash, quarry powder, clay and maize starch. The test was run during 350 to 700 days. It obtained better results with 700 days than with 350 days.

Production of highly disperse powder materials based on thermoplastics and thermoplastic blends by elastic-deformation grinding

1988 ◽  
Vol 30 (11) ◽  
pp. 2576-2584 ◽  
Author(s):  
N.S. Yenikolopyan ◽  
Ye.L. Akopyan ◽  
A.Yu. Karmilov ◽  
V.G. Nikol'skii ◽  
A.M. Khachatryan
Keyword(s):  
Elastic Deformation ◽  
Disperse Powder ◽  
Powder Materials ◽  
Thermoplastic Blends

Mechanical Model of Pelletization in the Impressing Roller System

2013 ◽  
Vol 732-733 ◽  
pp. 348-351
Author(s):  
Xiao Peng Huang ◽  
Fang Xin Wan ◽  
Jing Feng Wu
Keyword(s):  
Research Result ◽  
Reference Value ◽  
Force Balance ◽  
Total Force ◽  
Force Analysis ◽  
Forming Mechanism ◽  
Material Layer ◽  
Work Area ◽  
Function Relationship ◽  
Roller System

By the force analysis of alfalfa grass powder material layer in work area of circular mould pelletizing system, grass pellet briquetting mechanism when alfalfa grass powder pass work area was explained, function relationship between the thickness of material layer and the circular mould angle was established, force balance equation of material layer differentiation unit under the general conditions was deduced, and the total force of material layer applied by circular mould was obtained. Research result has practical meaning for guiding the process test of grass pellet product and optimizing product structure, and has a certain theoretical reference value for in-depth revealing granulating forming mechanism of hoop standard granulator.

Calculation of Force Parameters for Powder Material Hydrostatic Compaction

2018 ◽  
Vol 54 (7-8) ◽  
pp. 482-487
Author(s):  
M. B. Generalov ◽  
A. V. Slivinskii
Keyword(s):  
Powder Material
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