Document Type : Original Article
Authors
1 Department of Mechanical engineering, Payame Noor University (PNU), P.O.Box 19395-4697, Tehran, Iran
2 Department of Mechanical engineering, Payame Noor University (PNU), P.O. Box 19395-4697, Tehran, Iran
Abstract
The present work is the first study of its kind aimed at minimizing the energy consumption of the RO system pump and then finding the optimal configuration of a microgrid based on renewable energy in off-grid and on-grid modes. Comparing with traditional methods of using the power grid and diesel generators to supply the required power for the RO system prompts decision-makers and investors in this field to better advance the industry based on the energy-economic-environmental analyses of this work. In this research, the initial phase involved an examination using WAVE V.1.82q software to assess the viability of purifying surface water to provide a daily water supply of 3220 m3, employing BW30-400 modules. Subsequently, efforts were made to minimize operational pressure and thus lower the operational costs of the system through the utilization of low-energy modules like XLE-440i. Lastly, the evaluation of the power supply for the RO pump system was carried out across six different scenarios using HOMER V.2.81 software. The simulation results indicated that in the most favorable scenario, the energy required per m3 of water treatment stands at approximately 0.53 kWh. When a diesel generator serves as a backup, the lowest electricity production cost is associated with the solar system at $0.355 per kWh, with solar energy contributing to 91% of electricity generation. On the other hand, when grid electricity is the backup source, the lowest electricity production cost amounts to $0.024 per kWh, with only 1% of electricity generated from solar energy.
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