Determinação da velocidade econômica em adutoras sob diferentes condições de custo e funcionamento

Abstract

Aiming higher efficiency in irrigation pipelines projects several studies are done mainly about hydraulic characteristics of these systems. However, even hydraulically that’s right, the project can’t answer economic aspects. This context the working gift aimed make hum hydraulic and economic study on the flow rate of the water mains in galvanized steel and PVC. It was considered a standard pipeline, composed by suction pipe, pump set, connection system and protection and discharge piping, operating with flow rates of 50, 100, 150, 200, 250 and 300 m³ h-1 and nominal pressures of 80, 125 and 180 mca, operating time function, the total geometric drop, energy cost of pumping and piping of the acquisition. There was that steel pipes galvanized the economic speed varied among 0.88 and 2.65 m s-1 and PVC pipes, between 0.68 and 2.54 m s-1. It can be concluded that value of economic speed and decreases with the increase in the rate of operation of the pipeline and the increase in total drop geometric. The economic speed was indirectly influenced hair increase in energy tariff and directly influenced hair increased pipe cost.