Drip irrigation system with solar energy for tomato in Angola.

Drip irrigation system with solar energy for tomato in Cavaco, Benguela, Angola.

Rogério Mossande A., Brown Manrique O., Mujica Cervantes A., Mata Rodríguez C., Osorio León I.,

Gobierno Provincial de Benguela, Angola. Universidad de Ciego de Ávila (UNICA), Centro de Estudios Hidrotécnicos (CEH), Ciego de Ávila, Cuba.

 Revista Ciencias Técnicas Agropecuarias, ISSN -1010-2760, RNPS-0111, Vol. 24, No.2 (abril-mayo-junio, pp. 11-17), 2015, Cuba

Food security depends on improving irrigation for small farmers who grow half the world’s agricultural area, but the improvement of the efficiency of water management is needed through photovoltaic (FV) drip irrigation in small surfaces. Considering the availability of solar radiation and the lack of conventional sources of electricity in the Republic of Angola, the design of an Photovoltaic drip irrigation is suggest for tomato production in the valley of Cavaco, Angola, in an experimental area of 0.23 ha, where the estimation of the solar radiation on a horizontal plane and the inclination of the FV panel was made with the models of Hottel and Solener. The irrigation system was designed to high water demand of the crop by autonomous systems methods and solar power irrigation.

The results indicate that the use of a dropper of 3.5 L/h permits 2.49 hours’ irrigation times in each subunit. Mathematical models estimated global radiation values between 6 448.32 and 8 320.81 W/m2/day on a horizontal surface and between 6 775 and 8 710 W/m2/day on the surface of the panel tilted at 15°. The FV system consists of an array of 6 photovoltaic panels that generates a peak power of 1 814.39 WP, sufficient to ensure the functioning of the selected pump.

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