The evaluation of hydrogen production via a geothermal-based multigeneration system with 3E analysis and multi-objective optimization

• Published in: International journal of hydrogen energy Vol. 48; no. 22; pp. 8002 - 8021
• Main Authors: Tekkanat, Burak, Yuksel, Yunus Emre, Ozturk, Murat
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 12.03.2023
• Subjects: Economic analysis; Geothermal energy; Hydrogen generation; Multigeneration plant; Optimization; Thermodynamic analysis; Economic analysis; Thermodynamic analysis; Hydrogen generation; Geothermal energy; Optimization; Multigeneration plant
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2022.11.185

In this study, a novel geothermal-based multigeneration system is designed and evaluated in energy, exergy and economic (3E) analyses. Besides 3E analyses, multi-objective optimization has been assessed to reach the highest exergetic effectiveness and the lowest total cost rate. To evaluate the designed plant, thermodynamic balance equations are assigned to all sub-systems found in the design. These equations are solved by using Engineering Equation Solver (EES) software. According to the analyses' results, with base parameters, total power production is 1951 kW, the hydrogen generation rate is 0.0015 kg/s, and the whole energy and exergy efficiencies are 59.53% and 53.17%. The economic analysis performed for the multigeneration system indicates that the total cost rate is 186 $/h, and the levelized energy cost is 0.102 $/kWh. These results indicate that the designed geothermal-based multigeneration system performs better than a single-generation plant in terms of efficiency and cost. [Display omitted] •A new geothermal energy-based multinational plant is presented.•A detailed thermodynamically assessment for more effective design is performed.•Energy and exergy efficiencies for the present combined plant are evaluated.•Exergoeconomic assessment and optimization of this plant are conducted.