Research and development of the spiral pump for water-disadvantaged areas in the Philippines; part 1: statistically aided design of prototypes at Los Banos [Laguna, Philippines]
1990
Naegell, L.C.A. | Real, J.G. | Mazaredo, A.M. (Philippines Univ., Los Banos, College, Laguna (Philippines). Farming Systems and Soil Resources Inst.)
For economic reasons, many Filipino farmers cannot avail themselves of irrigation water even in areas where there are either existing irrigation systems or streamflow that could be tapped, since their fields are situated above the water level. Among the nonconventional means to harness the available water and which have potential for cost-effectiveness is the stream-driven spiral pump. Since there is until now only limited information available about the design parameters for most efficient operations, prototypes of spiral pumps were initially constructed, each with an outer diameter of 2.0 m and made out of flexible tube materials of different inner diameters. Varying the speed of rotation of the pump, the water volume scooped into the tube, the sum of coil diameters and the height of water delivery, resulted in different volumes of delivered water and different energy requirements. By setting the output of the pump in relation to the required energy efficiency data were obtained for different parameters. Through a multiple linear non-linear regression analysis, highly significant formulas were derived for performance predictions of the pump running under different conditions. With the data obtained in this study, with information on the kinetic energy of a given stream and the drag coefficient of the paddles of the pump, it is now possible to design a spiral pump where all design factors can be matched, allowing the most efficient kinetic energy utilization of a given stream flow for pumping purposes
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