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	Provedor de dados AGRIAMBI (3) REA (1) Autor Salvador,Conan A. (4) Botrel,Tarlei A. (3) Camargo,Antonio P. de (3) Pinto,Marinaldo F. (3) Almeida,Alexsandro C. S. (2) Raine,Steven R. (2) Alves,Dinara G. (1) Carvalho,Daniel F. de (1) Katsurayama,Geancarlo T. (1) Pereira,Diego J. de S. (1) Saretta,Ezequiel (1) Mais... Palavra-chave Automation (2) Irrigation scheduling (2) Tensiometer (2) Alternative power sources (1) Distribution uniformity (1) Economic analysis (1) Energy efficiency (1) Micro-irrigation (1) Pumping system (1) Technological innovation (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Ano 2021 (1) 2017 (3) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última TECHNICAL AND ECONOMIC FEASIBILITY OF USING A VARIABLE-FREQUENCY DRIVE IN MICRO-IRRIGATION SYSTEMS REA Pinto,Marinaldo F.; Pereira,Diego J. de S.; Carvalho,Daniel F. de; Alves,Dinara G.; Salvador,Conan A.. ABSTRACT Irrigation is essential for the development of crops in regions with scarcity or irregular rainfall distribution, enabling high productivity. However, the use of water resources and electrical energy leads to a concern with irrigation efficiency. Pressure demand varies during the operations of irrigation systems and the appropriate pressure can be regulated by variable-frequency drives for the power supply of the motor-pump set. This study aimed to analyze the technical and economic feasibility of using a variable-frequency drive to adjust the pressure in subunits of micro-irrigation systems. Laboratory tests were carried out to determine the electrical power consumed in each irrigated subunit for different slopes and the application or not of the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Pumping system; Energy efficiency; Economic analysis. Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162021000100112 An irrigation controller mechanically actuated by soil-water tension: I - Design, development and laboratory evaluations AGRIAMBI Almeida,Alexsandro C. S.; Botrel,Tarlei A.; Raine,Steven R.; Camargo,Antonio P. de; Pinto,Marinaldo F.; Salvador,Conan A.. ABSTRACT The objective of this study was to develop and evaluate an irrigation controller that was mechanically actuated by soil-water tension within laboratory conditions. The controller was designed and constructed using readily available hydraulic fittings and other componentry. The main components of the controller were a tensiometer; a rubber diaphragm that moves according to the variation in tension inside of the tensiometer; an activation rod that transfers the movement from diaphragm to the switch valve; and a steel spring that regulates the activation of soil water tension. Six irrigation controller samples were tested in the laboratory to evaluate the mechanical performance and component forces required to activate the controllers. The... Tipo: Info:eu-repo/semantics/article Palavras-chave: Irrigation scheduling; Tensiometer; Automation. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000600369 Irrigation controller mechanically actuated by soil-water tension: II - Field evaluations AGRIAMBI Almeida,Alexsandro C. S.; Botrel,Tarlei A.; Raine,Steven R.; Camargo,Antonio P. de; Pinto,Marinaldo F.; Salvador,Conan A.. ABSTRACT In this study, a field evaluation of the performance of an irrigation controller mechanically actuated by soil-water tension (SWT) was performed. The controller employs a tensiometer used as a sensor of SWT to directly control a mechanically actuated hydraulic valve. Six controllers were installed in an orchard to control the irrigation for six rows of plants over 64 days. Each controller controlled the irrigation of one lateral drip line. The drip irrigation system was gravity-fed from a water source placed 7 m above the soil surface. The SWT and the pressure in each lateral line were measured to evaluate the performance of the controllers. All the controllers tested in the field autonomously initiated and terminated the irrigation during the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Irrigation scheduling; Technological innovation; Tensiometer; Automation. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000500298 Methodology for designing lateral lines with microtubes operated under variable inlet pressure AGRIAMBI Katsurayama,Geancarlo T.; Saretta,Ezequiel; Camargo,Antonio P. de; Botrel,Tarlei A.; Salvador,Conan A.. ABSTRACT Design of lateral lines consisting of microtubes enables to optimize water distribution uniformity. In addition, there must exist a range of pressures at the lateral line inlet in which the water distribution uniformity remains acceptable. Thus, such emitters are interesting for use in micro-irrigation systems supplied by alternative power sources, in which temporal variability in the electrical power supplied to the pumping systems normally occurs. This study presents a methodology for designing lateral lines with microtubes operated under varying pressure, using the step-by-step method in order to establish the recommended range of lateral line inlet pressures. The proposed methodology was validated over three replicates by testing maximum,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Micro-irrigation; Alternative power sources; Distribution uniformity. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000900594 Registros recuperados: 4 Primeira ... 1 ... Última

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