Avaliação de emissor de irrigação tipo bico regulável utilizado em mangueira de jardim.

Abstract

The need for application of water to meet the water requirement of plants, requires methods and appropriate irrigation systems and can be economically low cost and simple handling to automated and high economic investment. The use of hose to maintain proper humidity levels for the plants in gardens is a more common practice within the urban irrigation systems, due to this, this paper begins an investigation into performance of a garden hose nozzle with regulator, 30 meter long, the manufacturer Plastmar Light. The study aims to obtain the characteristic curves of flow x inlet pressure of the hose, under conditions of 360 °, 720 ° and 1080 ° (1, 2 and 3 rounds of opening), and totally open and without the use of the nozzle controller. The experiment was performed using four different pressures at different points of plumbing system UFCG domestic supply, and in the range of higher pressure, through a brand FERRARI monoblock electric pump. How to read the manometer gauge was used Turotest brand, with full scale evaluation of 10 Kgf / cm 2 or 150 lbf / in 2 . We obtained the lowest flow when the nozzle 01 back open the regulator, inlet pressure in the hose 40 kPa and flow rate 300 L h-1, and in a fully open nozzle inlet pressure in the hose 210KPa releasing a stream of water 667 L h-1. Four curves were obtained performance characteristics of the regulatory bill, and note that the outflows in the four conditions of openness ranged from approximately 370 L h-1. The data obtained in the experiment somewhat varied, with only two points ranging in the order of 2% every three replicates and the curves of the performance of the issuer under various openings of the nozzle regulator gave values of R 2 close to 1 for the curve with the potential function. The flow regime was obtained at the emitter and the turbulent flow varied more in lower pressure (50 kPa) than when pressure was high (200 kPa). The throughput obtained by regulating the flow resembles minisprinklers already available.