Cassava Mash Dewatering Parameters

2007 ◽  
Vol 3 (1) ◽  
Author(s):  
Oladele Peter Kolawole ◽  
Leo A.S. Agbetoye ◽  
A. S. Ogunlowo
Keyword(s):  
Pressure Drop ◽  
Pressure Distribution ◽  
Steel Plate ◽  
Pressure Gauge ◽  
Galvanized Steel ◽  
Hydraulic Jack ◽  
Experimental Equipment ◽  
Face Area ◽  
Measuring Cylinder ◽  
Medium Resistance

A study was conducted to evaluate the parameters affecting the dewatering of cassava mash during processing. First, studies on the pressure distribution within the mash during the dewatering were carried out. Experimental equipment consisting of tyre tube filled with water, a copper tube, and a pressure gauge was designed and fabricated to measure pressure used in expressing the juice contained in the grated cassava mash. It also included a cylindrical dewatering tank made of galvanized steel plate and a sack which was used as control. The tank had 7mm holes drilled at the base to allow the flow of juice. The volume of juice was measured using a measuring cylinder and the stopwatch measured the time. IITA TMS 4(2) 1425 variety of cassava at three levels of maturity age of 9, 12 and 15 months was utilized in the study. The dewatering pressure is from hydraulic jack used to press the grated mash. The dewatering parameters investigated were pressure drop, face area of the filter medium and mash resistance. The results showed that mash resistance varied with the age of the cassava with the highest value of 54,000,000,000 m/kg recorded. Medium Resistance also varied with the age, 33,000,000,000/m was the highest value recorded for 15 months old sample. 0.00371m3 volume of filtrate was obtained from the 12 months old sample with 0.0945 kg mash cake deposit on the filtering medium as the highest deposit. The Kozemy constant value for TMS 4(2) 1425 variety of cassava was found to be 11400000 and Porosity 0.0181, the result presents the distribution and values of identified parameters numerically for equipment designers use.

New Correlation for Two-Phase Flow in 90 Degree Horizontal Elbows

2010 ◽  
Author(s):  
Florencio Sanchez-Silva ◽  
Ignacio Carvajal-Mariscal ◽  
Rene Tolentino-Eslava
Keyword(s):  
Pressure Drop ◽  
Two Phase Flow ◽  
Experimental Results ◽  
Galvanized Steel ◽  
Average Error ◽  
Phase Flow ◽  
Volumetric Fraction ◽  
Dean Number ◽  
Two Phase ◽  
Flow Pressure

The comparison of experimental data and results obtained from four global models — homogeneous, Dukler, Martinelli and Chisholm, used to evaluate the two-phase flow pressure drop in circular 90° horizontal elbows — is presented in this paper. An experimental investigation was carried out using three galvanized steel 90° horizontal elbows (E1, E2, E3) with internal diameters of 26.5, 41.2 and 52.5 mm, and curvature radii of 194.0, 264.0 and 326.6 mm, respectively. According to the experimental results, the model proposed by Chisholm best fitted them, presenting for each elbow an average error of E1 = 18.27%, E2 = 28.40% and E3 = 42.10%. Based on experimental results two correlations were developed. The first one is the classical Chisholm model modified to obtain better results in a wider range of conditions; it was adjusted by a dimensionless relationship which is a function of the homogeneous volumetric fraction and the Dean number. As a result, the predictions using modified Chisholm model were improved presenting an average error of 8.66%. The second developed correlation is based on the entire two-phase mass flow taken as liquid and adjusted by the homogeneous volumetric fraction ratio. The results show that this last correlation is easier and accurate than the adjusted Chisholm model, presenting an average error of 7.75%. Therefore, this correlation is recommended for two-phase pressure drop evaluation in horizontal elbows.

Portable pressure gauge locates pressure drop in homes

Opflow ◽  
1981 ◽  
Vol 7 (5) ◽  
pp. 6-6
Author(s):  
Donald F. Newnham
Keyword(s):  
Pressure Drop ◽  
Pressure Gauge

Application of Current Gain Compensation Method in Quality Control of Resistance Spot Welding of Galvanized Steel Plate

2010 ◽  
Vol 26-28 ◽  
pp. 401-404
Author(s):  
Bin Wan ◽  
Xin Bin Hu ◽  
Shi Jie Dong ◽  
Zhong Hou Liu ◽  
Mao Zhang ◽  
...  
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Steel Plate ◽  
Control Method ◽  
Galvanized Steel ◽  
Current Gain ◽  
Current Step ◽  
Resistance Spot ◽  
Welding Spot ◽  
Gain Compensation

In this paper, the control method of current gain compensation for welding is adopted. Precise current gain curves (i.e., current step curves) in resistance spot welding of galvanized steel plated are discussed and drawn. By analysis of failure of electrode cap, it indicates that new current step curve ensure that qualified welding spot nugget dimension is acquired. The welding spot is high in strength, stable and reliable in quality. It is superior to original current step curve.

scholarly journals Experimental Study on Desorption Characteristics of Anthracite in Positive Pressure Environments

2021 ◽  
Author(s):  
Zheng Gao ◽  
Chong Chen
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Pressure Drop ◽  
Inhibitory Effect ◽  
Methane Adsorption ◽  
Positive Pressure ◽  
Desorption Rate ◽  
Experimental Equipment ◽  
Equilibrium Pressure ◽  
Anthracite Coal

In order to investigate the desorption characteristics of methane adsorption in coal under positive pressure conditions, methane adsorption and successive desorption experiments of anthracite coal under positive pressure conditions were conducted on the developed experimental equipment, and the experimental data were analyzed. In the process of desorption of coal samples with the same adsorption equilibrium pressure and the same pressure drop gradient, the phase desorption rate decreased with the increase of pressure, and the positive pressure environment had a significant inhibitory effect on the desorption of methane in coal.

Depth Evaluation of Slits on Galvanized Steel Plate Using a Low Frequency Eddy Current Probe

2020 ◽  
pp. 59-66
Author(s):  
N. A. Nadzri ◽  
M. M. Saari ◽  
M. A. H. P. Zaini ◽  
A. M. Halil ◽  
A. J. S. Hanifah ◽  
...  
Keyword(s):  
Eddy Current ◽  
Steel Plate ◽  
Low Frequency ◽  
Galvanized Steel

Pressure Drop of Two-Fluid Mixtures in a Y-Typed Microchannel with Varying Cross-Section Area

2013 ◽  
Vol 284-287 ◽  
pp. 898-902
Author(s):  
Ben Ran Fu
Keyword(s):  
Pressure Drop ◽  
Pressure Distribution ◽  
Cross Sections ◽  
Cfd Simulation ◽  
Fluid Mixtures ◽  
Cross Section Area ◽  
Section Area ◽  
Theoretical Predictions ◽  
The Mean ◽  
Two Fluid

The present study investigates experimentally and numerically the single-phase flow of two-fluid mixtures (H2SO4 and NaHCO3 solutions) and of water in a Y-typed micromixer with uniform, converging, and diverging cross-sections. The mean hydraulic diameter of the three kinds of main channel is approximately 174 µm. The experimental data of pressure drop agree with the theoretical predictions and CFD simulation results within 10%. Furthermore, the pressure distribution prediction for converging and diverging microchannels is consistent with that from CFD results. The pressure falls rapidly in the diverging microchannel near the entrance and slowly near the outlet. Such the pressure distribution may enable the forward flow of a bubble in a diverging microchannel.

Measurement of Wall Thinning through Insulation with Ferromagnetic Cladding Using Pulsed Eddy Current Testing

2011 ◽  
Vol 301-303 ◽  
pp. 426-429
Author(s):  
Zhi Yuan Xu ◽  
Xin Jun Wu ◽  
Chen Huang ◽  
Yi Hua Kang
Keyword(s):  
Eddy Current ◽  
Steel Plate ◽  
Thickness Measurement ◽  
Measurement Range ◽  
Galvanized Steel ◽  
Shielding Effect ◽  
Pulsed Eddy Current ◽  
Wall Thinning ◽  
The Common ◽  
Lift Off

Pulsed eddy current (PEC) technique has been successfully used for measuring wall thinning of carbon steel equipments without removal of the insulation. In field applications, the probe performance decreases in presence of ferromagnetic claddings. This paper presents a method based on saturation magnetization to solve this problem. The main principle of this method is to weaken the magnetic shielding effect of the cladding by magnetizing it to saturation. A U-shaped magnetizer is designed to realize this method. Contrast experiments are performed on a Q235 steel plate covered by a galvanized steel cladding. The experiment results show that the thickness measurement range and lift-off range are increased by applying this method to the common PEC probe.

Fire and Explosion Analysis of Steel-Plate Composite Concrete Shield Building Under Large Commercial Aircraft Impact

2017 ◽  
Author(s):  
Shuaixi Li ◽  
Shujian Cheng ◽  
Honghui Ge ◽  
Fang Yuan ◽  
Xiaolin Huang ◽  
...  
Keyword(s):  
Pressure Distribution ◽  
Steel Plate ◽  
Pool Fire ◽  
Building Structure ◽  
Commercial Aircraft ◽  
Fea Model ◽  
Fire And Explosion ◽  
Temperature And Pressure ◽  
The Impact

The fire and explosion assessment is necessary for NPP to evaluate the effect caused by malicious large commercial aircraft impact. This report focuses on the fire and explosion effect on shield building structure of nuclear island according to the impact screening. With the investigation and analysis for the fire and explosion of aircraft impact, a simple and effective method was established. With this method the pool fire and fire explosion are analyzed and their effects on shield building structure are assessed based on the temperature and pressure distribution obtained from the FEA model.

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