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Volume 48 (1986)
- Issue 3-4 Pages 293-
- Issue 2 Pages 159-
- Issue 1 Pages 4-
- Issue Supplement Page･･･
Volume 48, Issue 3-4
Displaying 1-15 of 15 articles from this issue
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Hideo KABURAKI1986 Volume 48 Issue 3-4 Pages 293-294
Published: 1986
Released on J-STAGE: April 30, 2010
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Deposit and Drift Characteristics of Charged DropletsMasaki MATSUO, Mitsuo IIMOTO, Toshitaka UCHINO1986 Volume 48 Issue 3-4 Pages 295-301
Published: 1986
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSContinuously a previous report, the deposit characteritics of charged oil droplets which were sprayed with Electrodyn were measured to evaluate the effects on deposit of horizontal and vertical overlap arrangements or intervals of aluminium sampling pieces, the deposit densities of electrostatic spray on two types of model plant were compared with those of water mixed with dye (Direct-Scarlet 5g/l) by use of conventional power sprayer.
In the next place, deposit characteristics at electrostatic spray on potted plants were investigated, and these results were studied with refer to data of previous report. Moreover, in order to compare the drift characteristics of charged droplets of electrostatic spray with those of conventional power spray, two types of short and long wind tunnel were used and tested. Electrostatic atomizing characteristics at use of an electrolyte (Direct-Scarlet solution) as spray liquid of Electrodyn were tested and discussed.View full abstractDownload PDF (1101K) -
Moisture diffusion coefficient of tea leavesHitoshi YOSHITOMI1986 Volume 48 Issue 3-4 Pages 303-308
Published: 1986
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe experiments for obtaining the diffusion coefficients of tea leaves and stems were made in order to compare the drying rates of tea leaves and stems which were rather different. As the results of experiments, the diffusion coefficient of stems was greater than that of leaves, however the drying rate of leaves was greater than that of stems, because the distance of moisture transfer of stems was longer than that of leaves. However, the drying rate of stems was greater than that of leaves under the effect of kinetic action in primary drying process. This kinetic action caused that the diffusion coefficient of tea leaves became great, and it is one of the reasons that the constant rate period was maintained long comparatively in the primary drying process.View full abstractDownload PDF (955K) -
Determination of Design Criteria of Compressed Biomass FeederJinzo NAGAHIRO1986 Volume 48 Issue 3-4 Pages 309-315
Published: 1986
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe basic researches for deciding the design criteria required in the basic design of a compressed biomass feeder, which is constructionally one of principal equipments of a bio-gas and charcoal generator together with an indirect decomposition furnace, were carried out. The results may be summarized as follows:
(1) The proper compressive load ps exerted on biomass charged in the cylinder is 5-7MPa {about 50-70kgf/cm2} for both husk and sawdust.
(2) The friction coefficient of the cylinder inside μr is independent of ps, but is influenced very much by finished surface roughness of cylinder inside Rz. Consequently, it is desirable to finish the cylinder inside to the smooth surface of ∇∇∇ finish.
(3) It is possible technically to develop the compressed biomass feeder which supplies a piece of compressed biomass of layer thickness h2 pushed out of the outlet end of cylinder at fixed intervals of time.View full abstractDownload PDF (1082K) -
Relationship between the Air Velocity and the Distribution of ParticlesMasaru TERADA, Yoshiaki NAKAMURA, Noboru KAWAMURA1986 Volume 48 Issue 3-4 Pages 317-322
Published: 1986
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to distribute the granular pesticides and fertilizers uniformly, we made a distributing pipe for an experiment. The relationship between the Air velocity of distributing pipe and the number of the particles ditributed from the distributing holes, and its distribution uniformity were investigated.
It was found that distribution of particles (3.48mm in diam) through 16 distributing holes on the rectangular pipe (70mm×15mm) was fairly uniform (cv=18.9%).
When the air velocity of distributing pipe was adequately adjusted (7--7m/sec) with an aid of the secondary air flow from the 16 air insert holes on the opposite side to the distributing holes, the number of the particles distributed from the holes and its distribution condition were able to be approximated by Normal Distribution N (0, 12).View full abstractDownload PDF (919K) -
Analyses of Three Angles of The bladesJun CHEN, Satoru NAMBU, Hideo TERAO1986 Volume 48 Issue 3-4 Pages 323-334
Published: 1986
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis research provides a method to study the relations among the soil overturning properties, the shape and the trochoidal motion of blades. The soil overturning properties of blades are related to the grass-removing ability of the whole edge curve and the soil backwards throwing ability of the scoop surface. Also the properties are affected by the soil-deflecting ability of the scoop surface.
In order to investigate the effects of the shape and the trochoidal motion of blades, the effective grass-removing angle, effective soil-deflecting angle and effective cutting angle were defined in this paper, and three formulas were developed for analyzing the three angles respectively. Also the angles of three traditional Japanese blades N1, N2, N3 were analyzed and discussed in detail. The theoretical method was used for analyzing the angles of blade N1 which edge curve and scoop surface can be simply expressed by theoretical formulas. And the numerical method was used for the blades N2 and N3. The analysed results of the three angles were conformed with the experimental phenomena reported in the previous paer.View full abstractDownload PDF (1795K) -
Analysis of the Forming Mechanism of the PelletHaruo ESAKI, Takaaki SATAKE, Kangquan GUO1986 Volume 48 Issue 3-4 Pages 335-342
Published: 1986
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA model designed to analyse the forming mechanism of a pellet and compression forming characteristics of biomass was tested by simulating the process of Pelletization of the roller type pelleting machine and using compression testing devices of the plunger-cylinder type.
Pulverized bark (Hinoki) and stem (Sugi) of wood and rice husks were used as biomass materials, and the effect of the kind of material, water content, particle size, mass of material, plunger pressure, inner diameter of the cylinder, temperature of the cylinder, etc. on the compression forming characteristics was analysed.
The pellet forming pressure and the length of the straight part of the holes formed on the die were also investigated.View full abstractDownload PDF (1239K) -
Simulation of the Solar Pumping SystemKenji IMOU, Osamu KITANI, Tsuguo OKAMOTO1986 Volume 48 Issue 3-4 Pages 343-348
Published: 1986
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn order to clarify the performances of the solar pumping system beyond the tested conditions, the authors introduced a mathematical model of the system and investigated the system performance through computer simulation. From the result of investigation, the optimum operating method was found out, and it made possible to obtain the fundamental data for designing systems with higher performance suited for given environment.View full abstractDownload PDF (832K) -
Fumito TAKAGI, Kiyoshi MINAMI1986 Volume 48 Issue 3-4 Pages 349-360
Published: 1986
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSStoring grains for a long period calls for adequate measure against the troubles—segregation, caking, crushing, heat generation, bridging or deterioration—one is principally concerned with segregation at the time of charge of the grains in the silos and their caking during storage.
This was what led to our invstigations on the actual nature of segregation and caking in the silos storing imported soybeans.
At the same time, we intended also to study the physical characteristics of the whole and divided soybeans, dust, foreign matter and soybean skin. Our results show that (i) dust must be prevented because of its high humidity absorption, adhesion and heat generating tendencies, and that (ii) divided soybeans resist flow and tend to form lumps together with dust.
On the basis of these results, we considered ways and means of preventing segregation and have suggested use of bulk material charging device to avoid segregation when filling the silos with soybeans.View full abstractDownload PDF (2076K) -
Kanji OTSUKA, Hisaharu KURATA, Osamu KOBORI1986 Volume 48 Issue 3-4 Pages 361-367
Published: 1986
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe feasibility of precision planting by cell type metering devices was investigated by a belt cell type planter.
The metering accurracy was decided by the occurrence of empty cells which rapidly increased with the increment of planting speed. For clarifying the cause of the occurrence of empty cells, the behaviour of seeds dropping into cells at the bottom of a hopper was analized by applying the model of Queue. As the result of the analysis, it was clarified that the probability of empty cells (q) should be decreased to a negligible level corresponding with following equation, at free planting speeds, if the time (T) for a cell to pass the bottom of a hopoer was elongated by improving the shape of the hopper and making cells move slowly.
q=Aexp(-KT):A, K=constant
Therefore, it was considered that it was capable of precise metering by cell type metering devices and the devices were useful for the realization of precision planting.View full abstractDownload PDF (3871K) -
Static Milking ParlorAkihiro GONDO, Sanki HASEGAWA, Yukio AZUMA1986 Volume 48 Issue 3-4 Pages 369-375
Published: 1986
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA Simulation model was developed to study on operation in various static milking parlors.
The performance of the parlor was simulated under various conditions. And the prediction equation was established in order to estimate easily performance of static milking parlors.
The results are as follows:
1) Average milking time in the herd and number of stalls are most important factor in determining the performance of the static milking parlor.
2) The limit unit number in herringbone parlor by one-man operation is 3-double.
3) If it is possible to reduce the preparation work time, the performance of the parlor will be improved. And it is evident when the milker unit is full set.
4) The presence of feeding does not give any influence to the performance of the parlor.View full abstractDownload PDF (1044K) -
Yasuhiko MIYAKE1986 Volume 48 Issue 3-4 Pages 377-382
Published: 1986
Released on J-STAGE: April 30, 2010
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An Example of Seedbed Making Tillage by the Sieve-Shield SystemMinoru KOMATSU1986 Volume 48 Issue 3-4 Pages 383-387
Published: 1986
Released on J-STAGE: April 30, 2010
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Discoloration on Drying ProcessSetsuo HAYASHI1986 Volume 48 Issue 3-4 Pages 389-392
Published: 1986
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (534K) -
Masayuki KOIKE1986 Volume 48 Issue 3-4 Pages 393-396
Published: 1986
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (8740K)
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