Vol. 10, Issue 4 (2021)

Author(s):
GR Kathiriya, GV Prajapati, AM Paghdal, HD Rank and SV Kelaiya

Abstract:
The need and demand of solar photovoltaic water pumping system has been increased in the recent years, as a stand-alone water pumping system to pump water in remote locations. Micro irrigation system, which includes mainly drip and sprinkler irrigation method require constant maximum water pressure for normal system operation and it is difficult under solar photovoltaic pumping system due to variation in intensity of solar radiation during a day. Rain pipe irrigation systems can easily working under fluctuating pressure as well as low pressure condition effectively. The rain pipe system recently introduced for irrigation needs to be evaluated for their performance under solar photovoltaic pump. A field experiment was conducted to evaluate hydraulic performance of rain pipe irrigation system under three operating pressure of 0.25, 0.50 and 0.75 kg cm² keeping length of rain pipe 30m and 4m spacing between two rain pipes. The average maximum solar radiation 621.26 W/m² was received at 1:00 pm. The average discharge and water horse power of solar photovoltaic system ranged from 4.19 to 4.92lps at operating pressure of 0.75 kg/cm² during 10:00 am to 4:00 pm. Uniformity coefficient, distribution uniformity, mean application rate was determined under various operating pressure using solar pump. Results revealed that the highest uniformity coefficient, distribution uniformity and mean application rate of 83.63%, 75.08% and 12.47 cm/h was obtained at operating pressure of 0.75 kg/cm² respectively.