Performance evaluation of Solar Power-Driven Pump Irrigation in General M. Natividad, Nueva Ecija
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Date
2024
Authors
Neale Nathan G. Ruba
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Abstract
The study is about the performance evaluation of solar power-driven pump irrigation system in general M. Natividad, Nueva Ecija. The performance evaluation of solar power-driven pump irrigation consists of 3 trials. The first trial starts at 9:00 am and ends at 9:30 am. The second trial starts at 12:00 pm and ends at 12:30 pm. And the last trial starts at 3:00 pm and ends at 3:30 pm. The ambient condition, PV temperature, solar array, solar input and output, and discharge are the data collected every minute within the 30-minutes duration of every trial.
The average of 3 trials in ambient condition for surrounding temperature was 31.25oC and 30.94% for RH. For solar radiation, the average was 603.87 W/m2, and 2.72 m/s. After that, use the Reynolds number formula that has 265,664.2. With this, the data was considered as turbulent flow, then after that identify the fiction coefficient using the moody diagram. After getting the data, the head loss was able to be calculated and come up with the result which was 2.87 head loss and 28.24 m for total head in trial 1, 1.51 m head loss and 27.91 total head for trial 2, and 2.47 m head loss and 27.87 m total head for trial 3. After getting the total head and head loss, the data was able to get the system and pump efficiencies in the first trial which was 74.90% pump efficiency and 18.40% system efficiency. For the second trial, the pump efficiency was 77.75% and 15.85% for system efficiency. And for the third trial, the pump efficiency was 76.77% and 18.26% system efficiency.
The water drawdown is determined before and after the pump operation through the use of solinst 101 P2 water level meter. At 8:00 am, the first water level meter that was collected has a value of 5.12 Mbgs. The next data was collected at 12:00 pm which has 5.19 Mbgs with the declination of 0.07 meters. The last data was collected at 4:00 pm with the value of 5.28 Mbgs with 0.16 declination from first data, and it has opened the SPIS in eight ours.
The setting-up of 10-hectare field will be irrigated by a Solar Power-driven Pump Irrigation System (SPIS). In order to avoid or reduce losses during irrigation, the system was direct water transfer through pipes to the field. The cropping season is planned according to the Philippine National Standard PNS/BAFS/PAES 217:2017 ICS 65.060.35, with a staggered schedule of one week. The rice growth phases are used to determine the cropping schedule for both rice and maize.
The study uses the Blaney-Criddle Method to precisely calculate potential evapotranspiration (PET) in order to optimize irrigation schedule. Furthermore, PET is calculated using Thornthwaine’s approach using predicted weather information from the PAGASA 2024 Weather Outlook. The goal of the research is to improve crop productivity and water use efficiency by matching irrigation techniques to the unique needs of maize and rice crops. With the help of defined guidelines and climatic projections, this methodical approach guarantees sustainable agricultural operations.