Caracterização técnica e desempenho hidráulico de quatro gotejadores autocompensantes utilizados no Brasil

• Autor(a) principal: Dalri, Alexandre Barcellos [UNESP]
• Data de Publicação: 2015
• Outros Autores: Garcia, Carlos Jesus Baca, Zanini, José Renato [UNESP], Faria, Rogério Teixeira De [UNESP], Palaretti, Luiz Fabiano [UNESP]
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000801439&lng=pt&nrm=iso&tlng=en; http://hdl.handle.net/11449/127350
• topic: Evaluation; Emitter; Drip irrigation.; Avaliação; Emissor; Irrigação por gotejamento.

This study aimed to characterize and evaluate the performance of four models self-compensating drippers commonly used in drip irrigation systems in Brazil. To perform the study it was taking a sample of 25 emitters of each model. Evaluating their tubes (b) coefficient of manufacturing variation (c) wall thickness, (d) characteristic equation of the dripper, (e) internal diameter of the pipe, (f) spacing between emitters, (g) resistance water pressure at ambient temperature and to 40°C and (h) the tensile strength of the pipe with tension of 160 N and 180 N. The analysis showed variation coefficient of less than 0.045 for all manufacturing drippers (0.07 is maximum according to ABNT NBR ISO 9261). The exponents x of the equation pressure versus discharge ranged from 0.0082 to 0.0691 classifying them as self-compensating. From the results obtained it is clear that the tested products which are used in Brazil and used by irrigators had a satisfactory hydraulic performance in accordance with the standard.