الفهرس | Only 14 pages are availabe for public view |
Abstract The purpose of this study provide water and energy by designing two trickle irrigation systems with compensating emitters(Katif) which have constant discharge with different pressure on zero slope fields based on manufacturing and hydraulic variations. The experiments were carried out in Department of Agricultural Engineering Laboratory and Collage Farm of Faculty of Agriculture in Menoufia University during 2018. The experiments is based on flow variation of total allowable head loss for lateral by sitting a pressure regulator at the beginning of each lateral. Also based on the emission uniformity that dependent on the coefficient of variation of lateral. A manufacturing coefficient of variation was showed based on lab test by testing three emitters 2 , 4 and 8 l/h at inlet pressure 0.5, 1, 1.5 and 2 L/h. A total, CVt was determined in turn of calculating system uniformity. A field experiment was conducted for 50 m and 75 m of lateral length at zero slope for mm inner diameter and 16 mm outer diameter. In addition, spacing between emitters (2 m) with compensating emitters (Katif) under three different emitter flow rates (2, 4 and 8 L/h) for compensating emitters (katif) at inlet pressures one and 1.5 bar. Friction loss was measured along lateral line and compared to the calculated one. The coefficient of variation of emitter flow rate was found for 50 m and 75 m of drip lateral line on zero slope. Evaluations high lighting the effects of design choices in terms of energy saving, comparisons between optimal lateral lengths and analysis of lateral pressure heads variability are carried out. |