Prototype emitter for use in subsurface drip irrigation: Manufacturing, hydraulic evaluation and experimental analyses

Souza, Wanderley de Jesus and Rodríguez Sinobas, Leonor and Sánchez Calvo, Raúl and Arriel Botrel, Tarlei and Duarte Coelho, Rubens (2014). Prototype emitter for use in subsurface drip irrigation: Manufacturing, hydraulic evaluation and experimental analyses. "Biosystems Engineering", v. 128 ; pp. 41-51. ISSN 1537-5110. https://doi.org/10.1016/j.biosystemseng.2014.09.011.

Description

Title: Prototype emitter for use in subsurface drip irrigation: Manufacturing, hydraulic evaluation and experimental analyses
Author/s:
  • Souza, Wanderley de Jesus
  • Rodríguez Sinobas, Leonor
  • Sánchez Calvo, Raúl
  • Arriel Botrel, Tarlei
  • Duarte Coelho, Rubens
Item Type: Article
Título de Revista/Publicación: Biosystems Engineering
Date: December 2014
Volume: 128
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Ingeniería Agroforestal
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The current research aims to analyse theoretically and evaluate a self-manufactured simple design for subsurface drip irrigation (SDI) emitter to avoid root and soil intrusion. It was composed of three concentric cylindrical elements: an elastic silicone membrane; a polyethylene tube with two holes drilled on its wall for water discharge; and a vinyl polychloride protector system to wrap the other elements. The discharge of the emitter depends on the change in the membrane diameter when it is deformed by the water pressure. The study of the operation of this emitter is a new approach that considers mechanical and hydraulic principles. Thus, the estimation on the membrane deformation was based on classical mechanical stress theories in composite cylinders. The hydraulic principles considered the solid deformation due to force based on water pressure and the general Darcy–Weisbach head-loss equation. Twenty emitter units, with the selected design, were handcrafted in a lathe and were used in this study. The measured pressure/discharge relationship for the emitters showed good agreement with that calculated by the theoretical approach. The variation coefficient of the handcrafted emitters was high compared to commercial emitters. Results from field evaluations showed variable values for the relative flow variation, water emission uniformity and relative flow rate coefficients, but no emitter was obstructed. Therefore, the current emitter design could be suitable for SDI following further studies to develop a final prototype.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainAGL2008-00153/AGRUnspecifiedUnspecifiedUnspecified

More information

Item ID: 36217
DC Identifier: http://oa.upm.es/36217/
OAI Identifier: oai:oa.upm.es:36217
DOI: 10.1016/j.biosystemseng.2014.09.011
Official URL: http://www.sciencedirect.com/science/article/pii/S1537511014001640
Deposited by: Memoria Investigacion
Deposited on: 01 Jul 2015 16:35
Last Modified: 11 Jun 2019 08:42
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