Thermo-Economic Modeling of Hybrid Energy Systems for Geothermal Desalination

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Chinese explanation / 中文解读

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Original abstract

The aim of this study is to design, model, and thermo-economically evaluate a PV-battery-grid integrated reverse osmosis desalination system for geothermal brine treatment in the Balcova Geothermal District Heating System, İzmir, Türkiye, with the objective of maximizing photovoltaic energy utilization and minimizing grid dependence. The system comprises PV panels, batteries, and the grid to supply electricity during the desalination process and it is modelled and simulated via TRNSYS software. A comprehensive thermo-economic modelling approach is employed to evaluate system performance under three solar-radiation scenarios, namely the low-radiation (LR), average-radiation (AR), and high-radiation (HR) scenarios. The findings indicate that the scenario with minimal radiation has the maximum net present value and the longest payback period. The scenario with the average radiation is identified as the most feasible investment, with a net present value of $52,218.7 and a payback period of 11.1 years. The cost of energy varies depending on the scenario, with the lowest radiation resulting in the lowest cost per kWh at $0.22/kWh. However, taking into account the payback period of 11.16 years and a net present value of $52,218.70, the average radiation scenario is the most viable investment. Overall, the findings reveal that the proposed system offers a sustainable and economical solution to water scarcity, with detailed energy, exergy, and economic analyses supplying vital information regarding system design and scalability.

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