Browsing by Author "Silva, SAPS"

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item: Conference-Full-text
Development of a “roof-tile drier” for traditional roof tile industry – a feasible technological transformation step for productivity improvements, towards revival of a traditional industry
Warahena, ASK; Gunasekara, SN; Silva, SAPS
Abstract: Traditional industry remaining as much traditional is justifiable, if the industry is maintaining its finest outputs and consistent qualities with a sizable market share. Such industry may not be coming under criticisms for technology stagnations. The traditional industry of roof tile manufacturing is a kind of technologically stagnant industry, but not coming under the above mentioned acceptable type of traditional industry, especially because of the low productivity. As a measure of rescuing the traditional roof tile industry, the “step by step technological transformation” of the industry would be the exact need. This seems phenomenally justifiable with the roof tile traditional manufacturers’ desire to have a technologically enhanced and affordable replacement for the traditional drying process. As a critically important step, development of a feasible roof tile drier solution to enhance productivity in traditional roof tile industry was performed. The structural design of drier module and its setup, as well as the air flow, heat-source and heat-input quantity, and RH management were carried out. Mathematical model based drying and energy analysis also carried out, in parallel with the experimentations. As the final result, the complete dryer solution was derived with necessary parametric figures for realizations
item: Thesis-Full-text
Development of a solid feed block forming machine for cattle
Silva, SAPS; Punchihewa, HKG
Livestock statistics show that there are 1.2 million milking cows and 0.4 million buffaloes in Sri Lanka and the Department of Census and Statistics shows an annual per capita consumption of milk and milk products of about 4.6 kg/year. However, these values are comparatively low compared to the developed countries. Therefore, achievement of the selfsufficiency levels in dairy industry of Sri Lanka needs significantly both in growth and productivity. The issues which are slowing down or hampering the growth and productivity can be categorized on milk production related, distribution and marketing related, extension and support service related, consumer concern related, policy related and feeding related. Although, the nutrition is a key factor for the performance, health and welfare of dairy cattle, the prevailing cattle feeding has become an issue today for growth and production became of mostly primitive nature of practice, which is a challenge for the increased commercialization of dairy industry. Consequently, it has been identified that the well-recognized method of feeding cattle in commercial dairy industry is solid nutritious feeding blocks which are made of hygienically prepared agricultural residues. Aim of this research were producing suitable feed block and developing block making machine for the cattle in Sri Lanka. The objectives of this research were to identifying the requirements for cattle feed blocks and their manufacturing, to examine suitable shapes and sizes for feed blocks, and to design and manufacture a feed block machine and to test the machine for verifying the results. Suitable block forming methods, technologies and the suitable machineries were recognized through literature survey, brainstorming sessions and experimental procedures. Accordingly, design and fabrication of a novel block making machine was successfully completed. Suitable size and weight of the block, recommended recipes, production capacity of the machine, block forming method and type of power source were identified. Finally a machine was fabricated to suit the parameters identified above and was tested. Results revealed that the fabricated machine can address the design requirements of the machine. The production capacity of the machine was 100 blocks/ h with 200 mm × 200 mm ×110 mm size and 2 kg weight. The solid cattle feed blocks can be used to fulfill the nutritional requirements of dairy cattle under safe conditions with affordable cost. Further, adoption of this technology supports to make an easy feeding mechanism and enhance milk production through available agricultural residues and available technology in Sri Lanka. Adding automatic raw material preparation system and the automatic feeding system to the compaction machine are proposed as further improvements.