Caracterização De Sistema De Irrigação Por Aspersão Convencional Dimensionado Com Vazão Econômica E Prática E Diferentes Configurações Hidráulicas

Alves, Élvis da Silva; Saad, João Carlos Cury; Schimidt, Ana Paula Russo Assumpção; Araújo, Leandro Coelho de; Gomes, Maryjane Diniz de Araújo; Santos, Jannaylton Éverton Oliveira

doi:10.7127/rbai.v11n800706

Cited by 3 publications

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“…The conventional sprinkler irrigation system is largely used in Brazil (Alves et al 2017). However, under adverse meteorological conditions, such as high temperatures, low air humidity and increased wind speed, this system does not perform in its full capacity, causing considerable losses of water, fertilizer, and electricity due to its lower efficiency (Molle et al 2012;Sheikhesmaeili et al 2016;Araújo et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Uniformity of water distribution by a sprinkler irrigation system on a soccer field

et al. 2022

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Soccer field grass can be compared to highly sensitive crops regarding water deficit and must be irrigated throughout the year to provide decent conditions for use. For this, efficient irrigation systems are necessary to save water and energy, and this is possible, provided that they are evaluated. Therefore, this paper evaluated the water distribution uniformity, by different methodologies, for an irrigation system installed in a grass soccer field. Also, the influences of multiple spacings between sprinklers and meteorological factors on the final results were assessed. The irrigation system had Falcon 6504 sprinklers, operating at the pressure of 320 kPa. Six field essays were conducted considering overlaying water depths originated from the same irrigation system considering spacings between sprinklers varying from 6 m x 6 m, 6 m x 9 m, 9 m x 9 m, 9 m x 12 m, 12 m x 12 m, 12 m x 15 m, 15 m x 15 m, 15 m x 18 m, 18 m x 18 m, 18 m x 21 m, 21 m x 21 m, 21 m x 24 m, 24 m x 24 m, 24 m x 27 m, 27 m x 27 m, 27 m x 30 m and 30 m x 30 m. The uniformity coefficients used were: Christiansen uniformity coefficient (CU), distribution uniformity coefficient (DU), absolute uniformity coefficient (UA), statistical uniformity coefficient (US), Hart uniformity coefficient (UH) and HSPA standard efficiency (UHSPA). Meteorological data were obtained during the essays. Wind speed caused reduction in the length of the water jet applied by the sprinkler and also caused a bigger effect on the water distribution uniformity. Both CU and UH showed higher values compared to the other coefficients. The increase in the spacing between the sprinklers resulted in reduced water distribution coefficients. To comply with technical and economic criteria, an arrangement of 12 m x 15 m between the Falcon 6504 sprinklers, operating at a 320 kPa pressure, is recommended.

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Section: Introductionmentioning

confidence: 99%

Uniformity of water distribution by a sprinkler irrigation system on a soccer field

et al. 2022

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“…Várias estudos (FERNANDES et al, 2014;CALDAS;REZENDE, 2016;ALVES et al, 2017; CHAMBA; ZUBELZU; JUANA, 2019) vem sendo realizados com o propósito de maximizar a eficiência de projetos de irrigação, principalmente quando relacionados à parte hidráulica do sistema (ZOCOLER et al, 2011), no aprimoramento do manejo de irrigação e nas relações de custo dos sistemas (SONOWAL; SENAPATI; ADAMALA, 2016). Perroni et al (2015) ressaltam que no uso da irrigação como acréscimo tecnológico é de suma importância a utilização dos recursos hídricos e energéticos disponíveis de forma racional, para a própria sustentabilidade da agricultura irrigada.…”

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Modelo Matemático Para Determinação Do Diâmetro Econômico De Tubulações De Recalque

Pimenta

Robaina²,

Peiter³

et al. 2019

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MODELO MATEMÁTICO PARA DETERMINAÇÃO DO DIÂMETRO ECONÔMICO DE TUBULAÇÕES DE RECALQUE BRUNA DALCIN PIMENTA1; ADROALDO DIAS ROBAINA1; MARCIA XAVIER PEITER1; JHOSEFE BRUNING1; MIGUEL CHAIBEN NETO1 E YESICA RAMIREZ FLORES1 1Programa de Pós-Graduação em Engenharia Agrícola, Universidade Federal de Santa Maria/RS, Av. Roraima, nº 1000, Bairro Camobi, Santa Maria/RS, Brasil, CEP 97105-900, brunadpimenta@gmail.com, diasrobaina@gmail.com, mpeiter@gmail.com, jhosefe.b@gmail.com, miguelchaiben@gmail.com, yeyiramiflo@gmail.com. 1 RESUMO O conhecimento do diâmetro econômico de tubulações é de grande importância em dimensionamentos de sistemas de recalque, pois, assim, é possível otimizar os custos de sistemas de irrigação. O objetivo deste trabalho foi propor um modelo matemático para o cálculo do diâmetro econômico de tubulações de recalque utilizadas em sistemas de bombeamento de água para irrigação. Na modelagem matemática do cálculo do diâmetro econômico foi utilizada, para mensurar a perda de carga, a equação de Hazen-Williams, levando em consideração o custo das tubulações, o custo do conjunto motobomba, o custo da energia consumida e o fator de recuperação do capital. Nas simulações foram utilizadas vazões de 25 a 500 l s-1, em intervalos de 25 l s-1, fator de recuperação do capital de 10, 15 e 20%, e preço da energia consumida de US$0,09, US$0,10 e US$0,11 kWh-1, para tubos de aço com espessura de 2,00mm, 2,65mm e 3,00mm. Para validação do modelo proposto, por meio da comparação com um modelo que utiliza a formulação de Darcy-Weisbach, foram utilizadas a raiz média do desvio quadrático, a raiz média do desvio quadrático normalizado, a eficiência do modelo e o índice geral de desempenho do modelo. Os resultados indicam que o modelo proposto apresenta índice geral de desempenho próximos a 1,00 em todos os cenários, podendo, dessa forma, ser utilizado com precisão para determinação do diâmetro econômico de tubulações de recalque sem necessidade do uso de equações que necessitam de processos iterativos para sua solução. Palavras-chave: modelagem, irrigação, consumo de energia, Hazen-Williams. PIMENTA, B. D.; ROBAINA, A. D.; PEITER, M. X.; BRUNING, J.; CHAIBEN NETO, M. E FLORES, Y. R. MATHEMATICAL MODEL FOR DETERMINING THE ECONOMIC DIAMETER OF PRESSURIZED PIPES 2 ABSTRACT The knowledge of the economic diameter of pipelines is of great importance in the design of water pumping systems because it makes possible to optimize costs of irrigation systems. The objective of this work was to propose a mathematical model for the calculation of the economic diameter of pressurized pipes used in water pumping systems for irrigation. In the economic diameter calculation mathematical modeling Hazen-Williams equation was used to measure loss of load, taking into account the pipes’ cost, the cost of the motor pump, the cost of the energy consumed and the recovery factor of the capital. In the simulations, flow rates of 25 to 500 l s-1 were used, in intervals of 25 l s-1, capital recovery factor of 10, 15 and 20%, and energy price of US$0.09, US$0.10 and US$0.11 kWh-1, for steel pipes with thickness of 2.00mm, 2.65mm and 3.00mm. For validation of the proposed model, through comparison with a model using Darcy-Weisbach formulation, the mean root of the quadratic deviation, the mean root of the normalized quadratic deviation, the model efficiency and the overall performance index of the model were used. The results indicate that the proposed model presents a general index of performance close to 1.00 in all scenarios and can therefore be used with precision to determine the economic diameter of pressurized pipes without the use of equations that require processes solutions. Keywords: modeling, irrigation, energy consumption, Hazen-Williams.

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Predictive Models of Water Application and Distribution Efficiency in Conventional Sprinkling

et al. 2020

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Correct determinations of distribution (Ed) and application (EA) efficiencies allow adequate estimations of the gross irrigation depth. This study aimed: i) to determine the distribution efficiency using the Christiansen uniformity coefficient (CUC) in a sprinkler irrigation system under different weather conditions and working pressures; ii) to compare the mean, median, and cumulative CUC values; and iii) to evaluate the predictive capacity of four EA estimation models.CUC values were determined from 80 assessments, as well as the mean, median, and cumulative. The precipitated water depth accumulated in each collector was considered for the accumulated CUC. More uniform evaluations were used for EA (working pressure of 196 kPa), resulting in 20 samples. Besides being measured, EA was estimated by Keller & Bliesner, Playán, Tarjuelo, and Beskow methods. Statistical indicators were the root mean square error, mean bias error, Willmott agreement index, mean absolute error, and Pearson correlation coefficient.CUC values ranged from 66.51 to 92.04%, and the accumulated CUC provided an improvement over the isolated evaluations. The Beskow model had the best EA estimations in conventional spraying.

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Caracterização De Sistema De Irrigação Por Aspersão Convencional Dimensionado Com Vazão Econômica E Prática E Diferentes Configurações Hidráulicas

Cited by 3 publications

References 1 publication

Uniformity of water distribution by a sprinkler irrigation system on a soccer field

Uniformity of water distribution by a sprinkler irrigation system on a soccer field

Modelo Matemático Para Determinação Do Diâmetro Econômico De Tubulações De Recalque

Predictive Models of Water Application and Distribution Efficiency in Conventional Sprinkling

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