TECHNO-ECONOMIC STUDY OF GEOTHERMAL POWER PLANT UTILIZATION FOR GREEN HYDROGEN PRODUCTION USING AWE AND PEMEC ELECTROLYZERS

• Main Author: Alwi Husaini, Muhammad
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/87333
• Institution: Institut Teknologi Bandung

Decarbonization and energy resilience have become pressing global issues due to climate change and dependency on fossil fuels. Renewable energy is considered an environmentally friendly solution, although it has limitations such as dependency on weather conditions and time. Green hydrogen, as a flexible energy carrier, offers an alternative to support energy transition and reduce carbon emissions. This study evaluates the integration of geothermal power plants (GPP) with a water treatment system (Water Treatment Plant/WTP) and electrolysis technologies, namely Alkaline Water Electrolysis (AWE) and Proton Exchange Membrane Electrolysis (PEMEC), to produce green hydrogen efficiently and economically. Simulations using WAVE software indicate that the combination of Ultrafiltration (UF), Reverse Osmosis (RO), and Ion Exchange Mixed Bed (IXMB) can produce water with conductivity levels of ?5 ?S/cm for AWE and ?1 ?S/cm for PEMEC, with energy consumption of 0.7–0.9 kWh/m3. Green hydrogen production using 10 MW electrolyzers yields 724.12 tons/year for AWE and 765.05 tons/year for PEMEC, with a Levelized Cost of Water (LCOW) of $1.19/m3 and $1.23/m3, respectively, and a Levelized Cost of Hydrogen (LCOH) of $7.22/kgH2 for AWE and $7.36/kgH2 for PEMEC. This study demonstrates that integrating GPP with WTP and electrolyzers is a feasible approach for efficiently producing green hydrogen and supporting sustainable energy transition in Indonesia.