Investigating Different Strategies to Reduce Energy Consumption in Saleh Abad Irrigation Network

Subject Areas : Farm water management with the aim of improving irrigation management indicators

Alireza Soltani ¹ , Hamzehali alizadeh ² , Jafar mamizadeh ³ , javad sarvarian ⁴

1 - M.Sc, Department of Water Engineering, Ilam University, Ilam, Iran.
2 - Assistance Professor, Department of Water Engineering, Ilam University, Ilam, Iran.
3 - Associate Professor, Department of Water Engineering, Ilam University, Ilam, Iran.
4 - Assistance Professor, Department of Water Engineering, Ilam University, Ilam, Iran.

Received: 2023-01-04 Accepted : 2023-02-18 Published : 2023-04-21

Keywords: Energy, Sectoring, Salehabad, Secondary pumping station, Primary pumping station,

Abstract :

Background and Aim: Today, the dependency between energy consumption and water use has become an important issue in pressurized irrigation networks. In addition to the problem of water scarcity, rising energy costs are also a challenge for the agricultural sector. The objective of this study was to investigate different strategies to reduce energy consumption in the pressurized irrigation network of Saleh Abad.Method: For this purpose, firstly, minor changes affecting energy consumption including change in diameter of lateral pipe were evaluated. In this level, evaluated scenarios were lateral pipe diameters in mm 63 and 75. Hydraulic analysis of irrigation network was calculated using WaterGems software and energy consumption in different pumping stations was calculated using energy audit. In the second level of evaluation, four scenarios were defined to reduce energy consumption in the irrigation networks by structural changes in the irrigation network based on energy audit strategies, critical point control, network sectoring and pumping station management. The scenarios were (i) network sectoring without changing the main canal line, (ii) change of main canal line to pipe line, (iii) implementation a new first pipe line for a part of the network that is irrigated by gravity water, and (iv) elimination of the secondary pumping station by increasing the primary pumping station head. In the scenarios i, ii and iii, the part of the irrigation network lands was determined that could be irrigated without the need for a secondary pumping station. In this scenarios, the energy saving was calculated in a new condition by varying the type or number of pumps in secondary pumping stations to provide upstream discharge and head requirements.Results:The results showed that according to the topographic conditions of the network, changing the diameter of the laterals had no effect on saving energy. Also, the results showed that by network sectoring and applying scenarios(i), (ii), and (iv), the irrigated area without the need for a secondary pumping station were 610.8, 1591.5 and 1621.8 hectares, the energy saving in secondary pumping station were 14.6, 46.1 and 47.4% and the total energy consumed in network were 3.9, 12.4 and 12.7%, respectively. In the scenario iv, the primary pumping station was optimized. The result indicated that if the pumps type of the primary pumping station were changed and the water reservoir was implemented in higher level, it would be possible to eliminate the secondary pumping stations. In this case, the total area network (2820 ha) was irrigated without the secondary pump station and the energy saving was 8.46%.Conclusion: The results of this study showed that changing the diameter of the lateral pipe had no significant effect on the energy consumption of the network. Also, the results showed that network sectoring and changes in main pipeline, it is possible to save up to 3121 MWh in the annual energy consumption of the network. Therefore, it is suggested that, network sectoring based on the input pressure of hydrants and the use of gravity, in the design of irrigation and drainage networks, considered as an effective solution to reduce energy consumption.

References:

Abadia, R., Rocamora, C., & Vera, J. (2012). Energy efficiency in irrigation distribution networks II: Applications. Biosystems engineering,111 (4):398-411.
Alaei, H., & Behzadmehr, A. (2014, August 8 -26). Modeling and analysis of water network, the aim of reducing energy consumption [Conference presentation].10th International Energy Conference, Tehran, Iran. [In Persian]
Carrillo- Cobo, M.T., Poyato, E.C., Montesinos, P., & Diaz, J.R. (2014). New model for sustainable management of pressurized irrigation networks. Application to Bembezar MD irrigation district (Spain). Science of the Total Environment, 473:1-8.
Carrillo Cobo, M.T., Rodriguez Diaz, J.A., Montesinos, P., Lopez Luque, R., & Camacho Poyato, E. (2011). Low energy consumption seasonal calendar for sectoring operation in pressurized irrigation networks. Irrigation Science, 29 (2): 157–169.
Corominas, J. (2010). Agua y energia en el riego en la epoca de la sostenibilidad. Ingenieria del Agua, 17 (3): 219–233.
Fernandez Garcia, I., Gonzalez Perea, R., Moreno, M.A., Montesinos, P., Camacho Poyato, E. & Rodriguez Diaz, J.A. (2017). Semi-arranged demand as an energy saving measure for pressurized irrigation networks. Agricultural Water Management, 193: 29-22.
Fernandez Garcia, I., Montesinos, P., Camacho Poyato, E., & Rodriguez Diaz, J.A. (2016). Energy cost optimization in pressurized irrigation networks. Irrig. Sci, 34: 1–13.
Fernandez Garcia, I., Montesinos, P., Poyato, EC., & Rodriguez Diaz, J.A. (2014a). Methodology for detecting critical points in pressurized irrigation networks with multiple water supply points. Water resources management, 28(4):1095-1109.
Fernandez Garcia, I., Moreno, M.A., & Rodriguez Diaz, J.A. (2014b). Optimum pumping station management for irrigation networks sectoring: case of Bembezar MI (Spain). Agricultural Water Management, 144:150-158.
Garcia-Prats, A., & Guillem-Pico, S. (2016). Adaptation of pressurized irrigation networks to new strategies of irrigation management: Energy implications of low discharge and pulsed irrigation. Agricultural Water Management, 169: 52-60.
Khadra, R., Lamaddalena, N., & Inoubli, N. (2013). Optimization of on demand pressurized irrigation networks and on-farm constraints. Procedia Environmental Sciences, 942-954.
Lamaddalena, N. and Khila, S. (2012). Energy saving with variable speed pumps in on demand irrigation systems. Irrigation Science, 30:157–166.
Lima, F.A., Martinez-Romero, A., Tarjuelo, J.M., & Corcoles, J.I. (2018). Model for management of an on-demand irrigation network based on irrigation scheduling of crops to minimize energy use (Part I): Model Development, 210: 58-49.
Nazari, B., Liaghat, A. M., Parsinezad, M., Bahmanpouri, S., & Alizadeh, H. A. (2016). Study of the Theoretical Basis and the Factors Affecting Energy Consumption in Pressurized Irrigation Systems in Qazvin Province. Journal of Water Research in Agriculture, 30(2): 261-271. [In Persian]
Rodriguez Diaz, J.A., Montesinos, P., & Camacho Poyato, E. (2012). Detecting critical points in on-demand irrigation pressurized networks—a new methodology. Water Resource Management, 26(6):1693–1713.