Otimização de sistemas de irrigação por aspersão pivô central
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Data
2010-02-26
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Universidade Federal de Goiás
Resumo
It has been noticed lately that some regions of Brazil has presented lower supplying of water and energy. It has occurred mainly during the period of the year when it is higher the need for irrigation water. It is necessary to recognize the possibility of negative impacts of irrigation, to analyze them and present solutions so as to improve the irrigation systems. The aim of this study is the estimation by one system of irrigating the central pivot, breaking from the characteristics of this systems and considering the analyzed of varies combinations of pipes for water main and lateral line, choice of the set motor pump with major yield, utilization and comparison among motor standard and of high yield after the selection from best option in diameter from water main and lateral line, analyze the system using a variable frequency drives. The result with the calculations performed was an energy saving of 25% considering the use of the diameter for the two economic systems adopted. For analysis using a frequency inverter with resulted in a saving of 9.23% for center pivot irrigation system exists, and for the new center pivot irrigation system resulted in savings of 10.6%. The analysis of return on investment considering the use of the system with variable frequency drive was a rate of return on
investment of 6.52% pa, center pivot irrigation system for existing and center pivot irrigation system was again 9.48 % pa. The project's return, more long-term, or feasible in
the short term, considering the benchmark interest rate to 12.25% pa. The results presented in the study show that there is great potential for power savings, and economic analysis showed the feasibility of the system with return on invested capital. The calculation used for determining the center pivot irrigation system reduces the cost and time to obtain data that make analysis of the potential of saving electricity.
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MEDEIROS, Antonio Marcos de Melo. Optimization of system center pivot sprinkler irrigation. 2010. 132 f. Tese (Doutorado em Ciências Agrárias) - Universidade Federal de Goiás, Goiânia, 2010.