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Open AccessArticle

Decision Support System Tool to Reduce the Energy Consumption of Water Abstraction from Aquifers for Irrigation

1
Renewable Energy Research Institute, Section of Solar and Energy Efficiency, C/ de la Investigación 1, 02071 Albacete, Spain
2
Department of Plant Production and Agricultural Technology, School of Advanced Agricultural Engineering, University of Castilla-La Mancha. Campus Universitario, s/n, 02071 Albacete, Spain
3
Regional Centre of Water Research, Castilla-La Mancha University, Campus Universitario s/n, 02071 Albacete, Spain
4
Institute for Regional Development, University of Castilla-La Mancha. Campus Universitario, s/n, 02071 Albacete, Spain
*
Author to whom correspondence should be addressed.
Water 2019, 11(2), 323; https://doi.org/10.3390/w11020323
Received: 20 December 2018 / Revised: 2 February 2019 / Accepted: 12 February 2019 / Published: 14 February 2019
(This article belongs to the Special Issue Modelling and Management of Irrigation System)
In pressurized irrigation networks that use underground water resources, submersible pumps are one of the highest energy consumers. The objective of this paper was to develop a decision support system, implemented in MATLAB®, to reduce the energy consumption of the water abstraction process, from an aquifer to a reservoir in existing wells, by installing a frequency speed drive. An economic module with the aim to assess the economic profitability of the investment cost of the variable speed drive was also developed. This tool was used in three wells that were located in the Eastern Mancha Aquifer. Several scenarios and irrigation seasons were analyzed while considering the interannual and annual variation in ground water depth. In the three analyzed irrigation societies (named A, B, and C), energy savings were achieved using a variable speed frequency when compared with fixed speed. Considering the analyzed cases, when the dynamic water table level is higher, energy savings ranged from 4.4% and 24.4%, using a variable speed ratio of 0.9 and 0.82. The energy savings based on the variable speed frequency increased when the dynamic water table level was lower, with the average energy savings close to 23%, 22% and 6.8% for irrigation societies A, B, and C, respectively. The results also show that the investment costs of the variable speed drive in two of the three irrigation societies studied were highly profitable, with a payback that ranged from 4.5 to 10 years. View Full-Text
Keywords: irrigation network; energy consumption; variable speed; well; water depth irrigation network; energy consumption; variable speed; well; water depth
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Córcoles, J.I.; Gonzalez Perea, R.; Izquiel, A.; Moreno, M.Á. Decision Support System Tool to Reduce the Energy Consumption of Water Abstraction from Aquifers for Irrigation. Water 2019, 11, 323.

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