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Abstract
A study was undertaken to introduce a 2 hp diesel shallow tubewell (STVV) technology and to evaluate the economic feasibility of the technology in eight upazilas under Dinajpur district. A total of twenty four STWs with four types of pump including 3.8 cm bearing, 3.8 cm bearingless, 5.08 cm bearing and 5.08 cm bearingless coupled with 2 hp diesel engines were installed in respective sites for field testing purpose. Low initial investment relative to its competitors (3-10 hp STW technology), lighter weight, less fuel consumption, simple operation and maintenance and easy on farm water management are positive indications of the 2 hp STVV technology. The research results indicated that each type of 5.08 cm pump performed better result with 2 hp engines in terms of benefit-cost ratio. In all stages of study, bearingless pumps performed better result than pumps with bearings. The study suggests that more research, development and demonstration are necessary to familiarize bearingless pump for STW technology.