A Technical and Economic Study between DC and AC Solar Pump Systems for Agriculture Plant
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Abstract
This research presents the study of DC and AC solar pumps for the agricultural plant in terms of technical and economic analysis. This brings to get a suitable way of applying them in different situations. For DC solar pump, the system consists of 5 panels of a 40 V 325 W solar panel which they are connected in series, DC motor 50-200 V and pumps. For AC solar pump, the system consists of the 325 W solar panel amount 10 panels, commercial inverter (VSD) 3.0 kW and centrifugal pump direct coupling with motor 3 Phase 2.2 kW (3HP). The comparison factors include investment cost, construction, water distribution pattern and water quantity. From experimental results, the DC solar pump system is lower investment cost than AC solar pump system in term of the equal amount of water volume. Moreover, if DC solar pumps compare with the petrol engine pump in terms of economical, it is found that the return on investment (ROI) approximately 27.48% a year with a Payback period of 3.64 years. However it depends on running hour per year. Furthermore, AC system can be developed to a hybrid system without any additional requirement while DC system cannot. Moreover, the DC system is simpler than another once. In conclusion, several small DC systems is more suitable for small flat agricultural area uncentered reservoir while the AC pump system is more suitable for high flow rate and high pressure or meanwhile AC systems can be designed for the agricultural wide area or uphill or long distance from a water reservoir.
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References
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