Techno-Economic Study of Green Hydrogen Production Process at Krueng Isep Micro-Hydro Power Plant (MHPP) in Nagan Raya, Aceh
Keywords:
Green Hydrogen, Alkaline Electrolyzer, Solid Oxide Electrolyzer, Techno-Economic Analysis, Micro-Hydro Power PlantAbstract
This study aims to evaluate the potential of green hydrogen production using Alkaline Electrolyzer (AEL) technology powered by electricity from the Krueng Isep Micro-Hydro Power Plant (PLTMh) in Aceh, Indonesia. AEL was selected due to its commercial availability, high technological maturity, competitive capital costs, and strong operational durability. The study was conducted through simulation using Aspen HYSYS V14 under two input power scenarios: 40,5 kW, based on validated operating data from the Tanjung Jati Electric Steam Power Plant, and a scaled-up scenario of 25 modules from the original hydrogen plant at Tanjung Jati, reaching 1.012,5 kW. Both scenarios were simulated under constant operating conditions of 10,3 bar and 60,5°C. Simulation results show that increasing input power significantly boosts the hydrogen production rate, from 0,50 kg/h to 12,52 kg/h. However, this also increases the specific energy consumption from 291 GJ/kg to 7,277 GJ/kg, indicating energy efficiency challenges at larger scales. Economically, higher input capacity requires greater CAPEX but yields a higher Internal Rate of Return (IRR) of 16% compared to 12%, while maintaining the same Payback Period (PbP) of 5,59 years. In addition, the Net Present Value (NPV) is substantially higher at larger scale. In conclusion, AEL technology is technically and economically viable for green hydrogen production based on micro-hydro sources. Improving energy efficiency and managing operational costs are key strategies to support Indonesia’s transition toward a clean and sustainable energy future.
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