pressure compensated solar pump irrigation without water reserwoir2
TRANSCRIPT
Pressure compensated solar pump for microirrigation without water
reservoir
Balint SuleIrrigation team leader
Summary
Today, the importance of irrigation is increasing. However, the mode of irrigation has changed a lot over the years, both energy and water has become increasingly expensive factor. The purest form of energy and water-saving irrigation is micro irrigation. The development of microirrigation particularly, the pressure compensation gave opportunity for PC solar pump application. The installed solar pump offers the opportunity to test in practice the theoretical issues. Irrigation solved by rigid polyethylene tubes and integrated emitters. Main issue was pressure compensation, which required by micro-irrigation principals. Pressure compensation solwed with a more cheaper solution compared to gravity fed use.
PLANNING AND ASSEMBLY
Flowchart
PV panels peak 1.5 kW, 158 V
Lorentz PumpPs 1200 Centric
Pressure relief valve 1”
Expansion tank (optional)
Built in relief valve
Built in filter with flushing option
Assembled Pressure compensation unit for solar pump
Lines from rigid PE pipe d:20mm
Plastro Katif emitters (red spots) integrated to each sapling
Riser from 2” mainline with tap before every line.
Pressure compensated solar pump ready for microirrigation of orchard.
MEASUREMENT
Measured flows under free outlet
Cloudy day
Clear weather
Extreme values of microirrigation system under 1 bar pressure maximum.
Conclusions and Recommendations
Issues shown, this 1 hectared orchard’s water demand satisfied with pressure compensated solar pump.
Moreover this pump could feed a four times bigger orchard .
This method could certainly held pressure in optimal range.
The most important result is that the pressure compensated solar microirrigation system meets the requirements of microirrigation.
There was uniform application in in drip network.
Water-stressed periods was always managable.
The application of relief valve in this case is clearly superseded the gravity fed tank with a minimal cost.
Blown water could used for husbandry or ponds, or lower in conventional, or in permaculture farming.
Zero need for water tanks, could reduce acquisition costs more than 30%.
Automated irrigation with this solar pump could reduce personell costs.
Precise use of needed amount of water could length well lifetime.
Increased system relief pressure (3-4 bar) with aright selected PC drippers, could lead to uniform but flow follower water application!
CalculationThe current pump at 1 hectare (210 pieces of saplings) is suitable for more than four hectares (900 trees) to perform. Based on 4 liters/tree value, 6 hours daily uptime, under 60 l/min minimum flows capacity. The number of potentially irrigated trees were calculated using the following formula:
= number of potentially irrigated trees
Practically it can be concluded that the resulting 24 liter minimum flow/ wood/ day, is the same as apples and apricots maximum daily water consumption’s lower limit which is 25 liter/day.
In case of direct PC solar pump useful runtime determined with the minimum flow needed for system.
If you are interested contact me!
https://hu.linkedin.com/in/[email protected]
Next projectSolar Octopus:Remediate broken microclimates with PC
solar pump.Crowdfounding for Gaia’s lung.Private capital for self sustaining water based
remediation, at degradated arid lands.