Recommendation of Equations For Determining Load Losses On Screen Filters
2007
Oliveira, Cleomar Ferreira de; | Frizzone, José Antônio; | Rettore Neto, Osvaldo.
Drip irrigations systems always require filtration systems for the minimum treatment of water. These filters are fundamental for the water quality used in the irrigated agriculture, promoting better performance of overhead irrigations and their components. The determination of load loss, due to installation of filters in the control bolster, plays an important role in hydraulic system design, in this respect, two aspects are relatively important: The load loss provoked by the installation of the filter and water influx passing through the filter in the process of filtration and allows better control bolster design and permits a more rigorous calculation of the pressure in the beginning of the derivation line. It’s in this context and with the objective to offer technical advice for the design of low cost filtration systems with high technological level that mathematical equations for potential increase of head loss as a function of circulating discharge in screen and disks filters were developed. The experiments were carried out at in the laboratory of irrigation in the Department of Rural Engineering of ESALQ/USP, using commercial filters of the mark AMIAD, with screen filter elements (models ¾ ", 1 ', 11/2” and 2 ") mesh 120. The experiments were done using maximum discharge for each filter model as recommended by the manufacturer, Based on the obtained results, these equations may be used for hydraulic system design for they are simple and reliable trustful.
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