Abstract
Solar energy is a clean and renewable energy production option and can be applied to pumping water. Pumping water with photovoltaic solar energy is one of the technologies that has stood out in the country. In this context, the work aimed to evaluate the different methods of a drip irrigation system as a function of the use of an indoor amorphous photovoltaic pumping system, without electrical energy storage. The study was installed at the State University of Western Paraná. Voltage and current data were generated by the photovoltaic panels; solar irradiation was measured by the pyranometer device; the water pump flow rate was determined using the flow meter and in-line drip tube types. Irrigation performance was determined by the water distribution uniformity coefficients (CUD) and Christiansen’s uniformity coefficient (CUC). Tests were performed on open and partially cloudy days. The experiment totaled 40 sampled data, half being collected on sunny days and the other half on partially cloudy days, at 9:45 am; 11:00 am; 1:30 pm and 3:00 pm. The methodology had the greatest influence on the CUD value. For the CUC parameter, the values were approximately 89% for the studied methods. Values remained under control for the Shewhart graph, but with the process capacity index affected.
Highlights
The importance drip irrigation is a localized technology that significantly increases crop yields (Grant, 2019; Zocoler et al, 2004)
The autonomous photovoltaic system for pumping water in drip irrigation systems has become an economically competitive option for family farming, as well as populations located in remote areas, mainly because it is a technology with low operational and maintenance costs
The aim of the study was to determine the water distribution uniformity coefficients (CUD) and the Christiansen uniformity coefficient (CUC), without energy storage with an indoor experiment to evaluate the irrigation performance on days characterized as of open skies and partially cloudy skies, using the methods proposed by Keller & Karmeli (1974) e Denículi et al (1980) and Total
Summary
The importance drip irrigation is a localized technology that significantly increases crop yields (Grant, 2019; Zocoler et al, 2004). The autonomous photovoltaic system for pumping water in drip irrigation systems has become an economically competitive option for family farming, as well as populations located in remote areas, mainly because it is a technology with low operational and maintenance costs. Crops such as orchards, vegetables and organic crops need appropriate nutrients and uniformity in their irrigation, and this irrigation system allows for greater collection and rational use of water, avoiding harvest losses due to water stress. The photovoltaic panel generates electrical energy in direct current and, after converting it to alternating current, it is injected directly into the electrical energy network of the energy distributor (Rawat et al, 2016; Villalva & Gazoli, 2012)
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