Thermodynamic and exergo-economic assessments of a new geothermally driven multigeneration plant

• Published in: International journal of hydrogen energy Vol. 47; no. 45; pp. 19463 - 19480
• Main Authors: Koc, Murat, Yuksel, Yunus Emre, Ozturk, Murat
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 26.05.2022
• Subjects: Economic analysis; Exergy analysis; Geothermal energy; Hydrogen production; Multi-generation; Economic analysis; Multi-generation; Exergy analysis; Geothermal energy; Hydrogen production
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2022.01.044

In this paper, a new geothermal-based multigeneration system is designed and investigated in both thermodynamic and economic analyses. The reason to select the geothermal source is that geothermal power is a renewable and sustainable power resource, and also it is not weather dependent. The proposed geothermal-based multigeneration plant is able to produce power, heating, cooling, swimming pool heating, and hydrogen. The main idea in this renewable-based multigeneration system is to create valuable products by using waste heat of subsystems. Then, by applying thermodynamic analyses, the energy and exergy performances of proposed multigeneration system are computed. Also, parametric work has been performed in order to see the impacts of the reference temperature, geothermal fluid temperature, and geothermal water mass flow rate. Finally, exergo-economic analysis based on exergy destruction or thermodynamic losses is done to gain more information about the system and to evaluate it better. According to the calculations, the overall plant's energy and exergy performances are 32.28% and 25.39%. Economic analysis indicates that hydrogen production cost can be dropped down to 1.06 $/kg H2. [Display omitted] •A new geothermal energy-based plant is developed for multigeneration.•Thermodynamic and economic analyses are given for more effective design.•Overall energy and exergy efficiencies are computed as 32.28% and 25.39%.•The impact of working parameters on the plant performance is analyzed.