Energy Efficiency of a Center Pivot Irrigation System

Barbosa, Brenon Diennevan Souza; Colombo, Alberto; Souza, João Gabriel Notel de; Baptista, Victor Buono da Silva

doi:10.1590/1809-4430-eng.agric.v38n2p284-292/2018

Cited by 15 publications

(7 citation statements)

References 13 publications

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“…Units of the indicator could be either of kWh, MJ or GJ per m 3 of water and electric consumptions were used for the analysis (Barbosa et al 2018). Its inverse is called intensity of energy-related water usage or may be referred to as water footprint of energy (m 3 /MJ).…”

Section: Water-water (Ww): This Nexus Performance Indicator Represent...mentioning

confidence: 99%

Analysis of Water-Energy-Crop Nexus Indicators in Irrigated Sugarcane of Awash Basin, Ethiopia

Kedir¹,

Berhanu²,

Alamirew³

2022

Preprint

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Pressures on limited resources of water and energy in agriculture forced researchers to look for alternative approaches towards the solutions integrating the resources. Since the emancipation of WEF nexus concept, several methods including indicator approaches have been developed and in use to analyze their linkages. The aims of the study were to determine and categorically compare performances of sugarcane producing irrigation schemes and technologies in Awash basin of Ethiopia. Water applied, input energy used and productivity data of eleven irrigation schemes found in Wonji, Metehara and Kessem sugar factories were used for the for the study and performances of each scheme were evaluated. Then, based on statistical analyses, irrigation schemes were grouped into gravity surface, pump surface and pump sprinklers. After normalizing the original data through min-max, performance scores were determined based on equal weight and entropy methods. Categorical assessments revealed that gravity surface schemes had highest total input energy use and energy productivity scores while pump sprinkler schemes were better on water applied, Relative Irrigation Supply (RIS) and water productivity indicators. However, regarding composite performance indicators or WEF nexus indices, pump surface schemes scored the highest followed by gravity surface schemes while sprinklers were the least. The study proved the emphasis of the sugar industries of the basin for crop productivity with the expenses of energy and water utilizations. Hence, improvements on water managements of gravity surface schemes and energy utilization of sprinkler schemes were recommended as key solutions for balanced resource use as well as overall sustainability of the sector.

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Section: Water-water (Ww): This Nexus Performance Indicator Represent...mentioning

confidence: 99%

Analysis of Water-Energy-Crop Nexus Indicators in Irrigated Sugarcane of Awash Basin, Ethiopia

Kedir¹,

Berhanu²,

Alamirew³

2022

Preprint

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“…Centre pivot irrigation system efficiency can be estimated by using indicators adapted to the system (Barbosa et al, 2018). The CUH is used widely to describe the distribution of water uniformity, and the most common interval of water application efficiency with such systems is about 90% (Lecina et al, 2016).…”

Section: Hermann and Hein Uniformity Coefficientmentioning

confidence: 99%

Irrigation Uniformity Optimisation of a Mini-Centre Pivot System

Salah¹,

Guerrah²,

Atia³

2021

Eng. Agríc.

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In El Oued, southern Algeria, the traditional Mini-Centre Pivot System (MCPS) is widely used for the irrigation of agricultural crops, and its use has been growing continuously. However, these systems have a constant nozzle diameter along the lateral pipe, which affects productivity directly, besides decreasing both the quantity and quality of agricultural products by irrigation heterogeneity. Therefore, optimising the design of the MCPS nozzles is linked strongly to the desired uniform irrigation. This study aims to determine the optimal configuration of nozzles for high irrigation uniformity. To achieve this goal, a genetic algorithm was used for maximising the uniformity of MCPS-mediated irrigation. The optimisation is carried out according to water distribution modelling, calculation of the Heermann and Hein uniformity coefficient (CUH), and existing nozzle diameters. To verify the accuracy of the proposed model, three existing MCPS (60 m, 50 m, and 46 m in length) are investigated experimentally. The developed code findings in terms of CUH are in agreement with those obtained by experimental tests. The analysis indicated that the nozzle diameter should vary from 5 to 15 mm along the lateral pipe. In these optimal conditions, the CUH was improved by 29.77%, 33.99%, and 19.36%, respectively, for the existing 60, 50, and 46 m irrigation systems. The most obvious findings to emerge from this study is that using a genetic algorithm to optimise the design based on the nozzle size improves water application uniformity by more than 19% in terms of the CUH.

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“…O custo com energia é uma das variáveis mais importantes na agricultura irrigada, principalmente em épocas de crise energética e com constantes reajustes das tarifas (BOYER et al, 2014;BARBOSA et al, 2018). Moraes et al (2014) em um estudo de automação com uso de inversores de frequência em sistema de bombeamento em pivô central, observaram uma economia no gasto com energia elétrica entre 18% e 52%.…”

Section: Introductionunclassified

Viabilidade Econômica-Financeira Da Otimização De Sistemas De Irrigação Tipo Pivô Central

Toledo

Neto

Silva

et al. 2019

RBAI

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Um sistema de irrigação com dimensionamento otimizado minimiza os custos de implantação e operacional. O objetivo desse trabalho foi avaliar a viabilidade econômica-financeira da otimização de dois sistemas de irrigação tipo pivôs centrais, comparando as características do dimensionamento existente com a simulação de um dimensionamento otimizado. O trabalho avaliou dois pivôs centrais com mais de 15 anos de instalação. A viabilidade foi realizada com base no tempo de retorno do investimento, e aceita caso o retorno sobre investimento (do inglês Return on Investment-ROI) máximo seja 4 anos. Os resultados demonstraram que com a otimização, a potência necessária na motobomba dos pivôs I e II passariam de 200 cv e 150 cv existentes para 90 cv, em ambos sistemas. No pivô I com a substituição de todo o sistema, o ROI variou de 6,07 a 8,78 anos e quando proposto manter a linha lateral, o ROI caiu para 1,82 a 2,71 anos. O pivô II, apenas a tubulação adutora e a motobomba tiveram sugestão de substituição resultando no ROI variando de 2,38 a 3,51 anos. Ambos os pivôs centrais possuem um superdimensionamento, sendo o pivô I mais distante do ideal. Contudo, ambos os pivôs demostram viabilidade econômica e financeira para sua otimização, com base na substituição parcial do sistema promovendo a redução do custo com energia elétrica. Palavras-chave: dimensionamento, tempo de retorno, energia elétrica.

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Energy Efficiency of a Center Pivot Irrigation System

Cited by 15 publications

References 13 publications

Analysis of Water-Energy-Crop Nexus Indicators in Irrigated Sugarcane of Awash Basin, Ethiopia

Analysis of Water-Energy-Crop Nexus Indicators in Irrigated Sugarcane of Awash Basin, Ethiopia

Irrigation Uniformity Optimisation of a Mini-Centre Pivot System

Viabilidade Econômica-Financeira Da Otimização De Sistemas De Irrigação Tipo Pivô Central

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