Caracterização e avaliação da eficiência de estações de bombeamento das lavouras de arroz em Alegrete, RS

Abstract

For a pumping station to have good efficiency, it depends on several factors such as good dimensioning, correct installation, pump maintenance, adequate diameter and condition of the piping and special parts. The characterization of irrigation systems in the same area, and the operating conditions of Pump Station (PS), of rice crops motivates this work, seeking parameters to evaluate efficiency. The goal of this work is to carry out the characterization of the water pumping stations, and to evaluate the efficiency of the PS, used in rice irrigation and to identify the possible factors that affect the efficiency. The visits were carried out in 10 properties, in the city of Alegrete, where the data collection of the irrigation systems was carried out, a total of 21 EB. The flow data, specific velocity of the fluid, geometric height, length and diameter of the pipes were collected. The number of PS irrigating the same area was quantified, the pump, motor, drive type and installation type were identified. The pumping stations studied in their entirety were installed on barges, and the PS distribution configuration to serve the same area, 56% of the properties with two PS. Regarding the installation position, approximately 94% vertically "drowned", and 73.33% with drive with pulleys. The overall performance of the PS in 43.75% was above 85%, ie Excellent, in relation to the performance of the pumping stations it was above 90 in 50% of the PS. The performance of the PS was very satisfactory, due to the fact that a large part worked with the global yield, remaining within the classification: excellent, very and good.