Solar Energy Drip Irrigation System for Sugarcane Plantation
Keywords:
crop irrigation, drip irrigation, solar energy, solar cell, sugarcaneAbstract
The objectives of research were designing and testing a suitable set of drip irrigation powered by solar cell for sugarcane plantation where rainfed dry and no electricity area. This design based on 1.5 m row width and 40 m length of drip tape in which drip tape laid on soil surface and movable. The irrigation set consisted of 1 m3 fillable water tank (1 m above land surface) and 12 V DC, 72 Ah water pump which maximum head and flow rate of 2.8 bar and 1.02 m3/hr respectively. The solar system consisted of a crystalline solar cell with maximum power 120 Wp ±3%, 18.0 V, 6.67 A, and 12V, 75 Ah battery accompanied with inverter. The 1” PVC pipe was used for main and 5 of 0.2 m spacing drip tapes were installed on main pipe with 1.5 m row space. The whole designed irrigation system covered 300 m3 . Tested result revealed the average, minimum and maximum drip flow rate were 0.82, 0.63 and 0.98 L/h respectively. The difference between maximum and minimum dripper flow rate was 35.85%. The emission uniformity (EU) was 76.83% and precipitation rate of was 2.73 mm/h. The total water flow rate was 820.00 L/h. The investment was 4,990.00 THB in which the cost of drip irrigation set, solar cell set and installation labor were 540, 4,350 and 100 THB respectively
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