Reducing energy requirements for sand filtration in microirrigation: Improving the underdrain and packing

Text Complet
Reducing-energy-requirements.pdf closed access
Sol·licita còpia a l'autor de l'article
En omplir aquest formulari esteu demanant una còpia de l'article dipositat al repositori institucional (DUGiDocs) al seu autor o a l'autor principal de l'article. Serà el mateix autor qui decideixi lliurar una còpia del document a qui ho sol•liciti si ho creu convenient. En tot cas, la Biblioteca de la UdG no intervé en aquest procés ja que no està autoritzada a facilitar articles quan aquests són d'accés restringit.
Compartir
Energy consumption in pressurised irrigation systems has become a major issue, even when microirrigation is used. Although the emitters used in microirrigation operate at low pressures, their filters require higher pressures and there is therefore no reduction in energy consumption. Part of the pressure drop found in filters is produced by the porous medium itself and this cannot be avoided. However, a large part of the pressure dissipated is caused by auxiliary elements of the filter and this could potentially be reduced without reducing the effectiveness of the filtration process. The auxiliary elements that produced most of the pressure drop in a sand filter were identified. The pressure drop in a scaled sand filter was measured at different points. A computational fluid dynamics (CFD) model of the filter was developed and validated using experimental data. Good agreement was observed between the measured and predicted pressures at the different locations. The CFD model was then used to analyse the regions and elements that produced most pressure drop in the filter and a new underdrain designed to reduce pressure drop was developed. It was predicted that the total pressure drop produced by the underdrain could be halved. In view of these results, a new underdrain design and packing strategy was proposed which could reduce the overall pressure drop in the filter by 35% ​
​Tots els drets reservats