Thermodynamic analysis and assessment of a novel integrated geothermal energy-based system for hydrogen production and storage

• Published in: International journal of hydrogen energy Vol. 43; no. 9; pp. 4233 - 4243
• Main Authors: Yuksel, Yunus Emre, Ozturk, Murat, Dincer, Ibrahim
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.03.2018
• Subjects: Energy; Exergy; Geothermal power; Hydrogen production; Thermodynamic assessment; Geothermal power; Exergy; Energy; Hydrogen production; Thermodynamic assessment
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2017.08.137

In this paper, thermodynamic analysis and assessment of a novel geothermal energy based integrated system for power, hydrogen, oxygen, cooling, heat and hot water production are performed. This integrated process consists of (a) geothermal subsystem, (b) Kalina cycle, (c) single effect absorption cooling subsystem and (d) hydrogen generation and storage subsystems. The impacts of some design parameters, such as absorption chiller evaporator temperature, geothermal source temperature, turbine input pressure and pinch point temperature on the integrated system performance are investigated to achieve more efficient and more effective. Also, the impacts of reference temperature and geothermal water temperature on the integrated system performance are studied in detail. The energetic and exergetic efficiencies of the integrated system are then calculated as 42.59% and 48.24%, respectively. •A new geothermal energy based new integrated system for hydrogen production is proposed.•Energy and exergy analyses of the entire system and its subsystems are performed.•Energy and exergy efficiencies of the integrated system are determined.•Impacts of system design variables on power and hydrogen generation are investigated.