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Comprehensive analysis and multi-objective optimization of a power and hydrogen production system based on a combination of flash-binary geothermal and PEM electrolyzer.
- Source :
-
International Journal of Hydrogen Energy . Oct2021, Vol. 46 Issue 68, p33718-33737. 20p. - Publication Year :
- 2021
-
Abstract
- In this study, comprehensive energy, exergy, and economic modeling, and optimization of a flash-binary geothermal system, were carried out for power and hydrogen production. The binary system is a combination of a dual-pressure organic Rankine cycle and proton exchange membrane electrolyzer. For performance improvement of dual-pressure organic Rankine cycle, zeotropic mixtures were used as the working fluids. The multi-objective Genetic algorithm was employed to optimize the system performance. According to the obtained results, the highest rate of exergy destruction was obtained for the steam turbine with a value of 16.42 kW. For the base case simulation, the energy and exergy efficiencies of the proposed system were obtained by 16.66 % and 58.03 % , respectively; also, the generated power, overall exergy destruction, and hydrogen production capacity were calculated by 114.53 kW , 82.755 kW , and 0.306 kg · hr − 1 , respectively. For the multi-objective optimization mode, the best performance was calculated for Pentane (0.467)/Butane (0.533) with energy and exergy efficiencies and hydrogen production of 16.67 % , 58.14 % , and 0.37 kg · hr − 1 . Moreover, the optimized payback period and NPV were around 5.52 years and 402600 $ , respectively. • Proposal of a flash-binary geothermal system for power and hydrogen production. • Using zeotropic mixtures for performance improvement of dual-pressure ORC. • Analyzing economic aspects of the proposed system for probable investment. • Energy and exergy efficiencies of 16.67 % and 58.14 % for the optimized mode. • Optimized payback period and total profit of 5.52 years and 402800 $. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03603199
- Volume :
- 46
- Issue :
- 68
- Database :
- Academic Search Index
- Journal :
- International Journal of Hydrogen Energy
- Publication Type :
- Academic Journal
- Accession number :
- 152516787
- Full Text :
- https://doi.org/10.1016/j.ijhydene.2021.07.206