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Theses

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1982 - 198941990 - 19964
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Subject: Agricultural Engineering × End date: 1996 × Start date: 1980 × Thesis Type: M.Tech. ×
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Now showing 1 - 8 of 8
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    ThesisItemOpen Access
    Water balance study of Karuvannur river basin
    (Department of Irrigation and Drainage Engineering, Kelappaji College of Agricultural Engineering and Technology, Tavanur, 1988) Santosh, G Thampi; KAU; John Thomas, K
    This study was undertaken to quantitavely assess the water resources of the Karuvannur River Basin and to study the monthly water balance in order to estimate the balance for ground waterrecharge or depletion during the period 1976 to 1985. The mean monthly rainfall over the basin during the period 1976-1985 was determined by Thiessen polygon method . Data regarding the amount of water released for irrigation from the Peechi reservoir was also collected. Due to lack of data, contribution from other sources was not taken into account. The total runoff from the basin during each month of this period was determined . The various crop combinations in the basin were identified and the area under each of these was estimated . The actual evapotranspiration during each month was estimated using the method outlined by Doorenbos and Kassam. The basin was regarded as an independent hydrologic unit . Hence surface and subsurface inflow and outflow were assumed to be negligible.
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    ThesisItemOpen Access
    Development of a low cost garden tractor
    (Department of Agricultural Engineering, College of Horticulture, Vellanikkara, 1982) Sivaswami, M; KAU; Muhammad, C P
    The study was conducted with the objectives of systematic analysis of components with respect to their kinematics, dynamics and ergonomics and evaluation of traction performance and economics of low cost garden tractor. A greaves Lombardini 5.4 hp diesel engine with 1800 rpm was selected and a simple three step speed reduction system having a single stage V belt drive and double stage chain drives with a pivotted countershaft clutch have been designed. A road speed of 6.635 kmph and field speed of 3.317 kpmh were achieved by using a cone pulley arrangement with 6.00 x 12 size wheel.Correct position of various components bringe the centre of gravity of the unit with and without implement at very close to the final drive axle for easy balancing
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    ThesisItemOpen Access
    Development of small scale equipment for extraction of cocoa butter and production of cocoa powder
    (Department of Agricultural Engineering, College of Horticulture, Vellanikkara, 1982) Ganeshan, V; KAU; George, T P
    The primary objective of this project was to evolve a viable technology and equipment system for small scale processing of cocoa beans. The study mainly concentrated on the development of an extraction unit for the separation of butter from cocoa mass. Various equipment required for small scale processing of cocoa beans were either identified or designed.
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    ThesisItemOpen Access
    Design, fabrication and testing of a power operated paddy dibbler
    (Department of Farm Power Machinery and Energy, Kelappaji College of Agricultural Engineering and Technology, Tavanur, 1996) Jayarajan, R; KAU; Jippu, Jacob
    A 2-row power operated paddy dibbler was designed, fabricated and tested at Kelapaji College of Agricultural Engineering and Technology, Thavanur. The main components of the dibbler were two seed boxes, plungers reciprocating within the seed tubes, fluted roller seed metering mechanism, dibbler wheels, stationary cam, frame and transport wheels. The seed tubes were fixed radially around the dibbler wheel with 45 mm of it projecting outwards for penetrating the soil. The plunger was actuated by a stationary cam and during its upward stroke it uncovered the farther end of the seed transfer tube and transferred the seeds into the seed tube and then into the holes made in the soil. In the downward stroke the plunger closed the seed transfer tube. Simultaneously the fluted roller transferred the seeds in to the seed transfer tube. The average speed of operation of the dibbler was 1.32 kmph and its field capacity and field efficiency were 0.031 ha/h and 78.18 per cent respectively. The average number of seeds dropped per hill was 5 and the seed rate obtained was 78 kg/ha. The seeds were placed within the confines of the holes made by the seed tube and plunger. There was absolutely no scattering. The depth of placement varied from 3.8 to 4.6 cm. The operating cost of the dibbler was Rs. 502.58/ha. This mechanism offers scope for developing dibblers with more number of rows for being operated more economically.
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    ThesisItemOpen Access
    Modification and performance evaluation of six row rice transplanter for conventional seedlings
    (Department of Farm Power Machinery and Energy, Kelappaji College of Agricultural Engineering and Technology, Tavanur, 1990) Bainu, T Kuzhively; KAU; Sivaswami, M
    The work was carried out at the Kelappaji College of Agricultural Engineering and Technology, Tavanur. The six – row rice transplanter was originally designed for mat type seedlings. Considering the importance of a transplanter using conventional type seedlings, the above transplanter was modified. The modifications were completed in three stages. The performance evaluation of the modified six row rice transplanter was conducted after each stage of modification. The average number of seedlings per hill could be reduced from the average value of six seedlings per hill before modification to 2.27 seedlings per hill after the modifications. The missing hills percentage was brought down from 20.83 per cent to 5.55 per cent and the floating hills percentage was reduced from 10 to 5.55. Percentage of damaged hills was reduced from 23.3 to 8.8. The field capacity of the machine was improved from 0.0139 ha/hr to 0.0162 ha/hr and field efficiency from 48.26 percent to 56.87 per cent. The use of the modified transplanter is profitable if it is operated beyond one hectare per annum. It gives a saving of Rs. 618.00 per hectare compared to the conventional hand transplanting giving a 2. 4 times reduction in total cost. The pay back period of the modified transplanter is 2.24 years when the annual utilization is 2 hectares per annum and 1.13 years when the annual utilization is 3 hectares per annum.
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    ThesisItemOpen Access
    Synthetic generation of streamflow data using computer simulation model
    (Department of Land and Water Resources and Conservation Engineering, Kelappaji College of Agricultural Engineering and Technology, Tavanur, 1993) Leven , K V; KAU; Jobi V, Paul
    A Study has been made to develop a computer simulation model for the synthetic generation of streamflow data for Chaliyar, one of the larger basins of the state. The data were collected from different river gauging stations for different durations. A suitable mathematical model namely Thomas Fiering Model was developed for the generation of synthetic data. The model was fitted for the observed monthly steamflows. The validity of the model was checked by comparing the statistical parameters of historical and generated data and by comparing the flow duration curves. It is seen that the model preserves various statistical parameters like mean, standard deviation and correlation coefficient. The study reveals that the computer simulation model developed is a very effective tool in the proper management of water resources system.
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    ThesisItemOpen Access
    Development and testing of a rotary type black pepper cleaner
    (Department of Farm Power Machinery and Energy, Kelappaji College of Agricultural Engineering and Technology, Tavanur, 1995) Abdul Wahab, V S; KAU; Jippu, Jacob
    A power operated rotary type black pepper cleaner is developed, tested and its performance evaluated. The major parts are an inclined circular disc, an involute shaped scraper, a feeding unit and a collecting tray. The black pepper admixture is fed to the drum sieve through a hopper. By rotating the sieve, feed material fall uniformly over one-half of the area of the inclined rotating disc. Good pepper grains being nearly spherical in shape roll down at one end, whereas foreign materials which cannot roll down as freely, is scraped out at the other end by means of an involute scraper. Both cleaned and uncleaned grains are received in a collecting tray placed below the disc. A 3-phase 0.5 HP variable speed dynodrive motor along with a 10:1 gear reduction unit operates the machine. The important physical properties of black pepper relevant to cleaning process are also studied. The trials are repeated for the surfaces of mica and cotton under different levels of feed rate, angle of inclination and speed. Better performance is obtained in the case of cotton surface. Under these conditions, a cleaning efficiency of 88 per cent is obtained at a feed rate of 12 kg/h, angle of disc 11o and at a speed of 10 rpm. The cost of the machine excluding the power unit comes to Rs. 1’100/-. The operating cost of machine is found to be Rs. 16.45/h. It is recommended for further studies and modifications.
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    ThesisItemOpen Access
    Sea water intrusion studies for coastal aquifers
    (Department of Irrigation and Drainage Engineering, Kelappaji College of Agricultural Engineering and Technology, Tavanur, 1988) Saley, Abraham; KAU; .John Thomas, K
    Studies were conducted in three villages along the coastal areas of Trichur district, namely, Nattika, Talikulam and Edamuttam, to know the extent of sea water intrusion through aquifers. Observations were made in existing wells along an alignment normal to the coast line. Aquifer parameters and fresh water flow through the aquifer were computed making use of borehole data available for the region. The positions of the interfaces were determined using established formulae. The possible shifting of the interfaces due to reduction In fresh water discharge consequent to future increased rate of pumping was predicted. In each village, -three wells were taken for the study purpose. In all the cases, the maximum rates of pumping for various depths of wells, which will not cause sea water intrusion problems, have been deter¬mined. Chemical analysis showed that, at present there was no salt water intrusion in the wells under study. The results of the present study lead to a better understanding of the sea water intrusion problem, the determination of the position of the interfaces for various pumping rates might be effectively used in fixing the location of wells, pumping rates and depth of wells. The study would be made use of designing a ground water system in coastal areas for a better utilisation of ground water resources.