Exergy, economic, and optimization of a clean hydrogen production system using waste heat of a steel production factory

In this present research study a multi-generation energy system which is coupled with CO2 capture unit which is based on Rankine cycle, organic Rankine cycle, ejector cooling system and absorption chiller has been analyzed via energy, exergy, exergy-economic aspects by developing MATLAB, also to achieve the optimum operating condition genetic algorithm has been applied for system optimization. The objective of this study is to propose an optimized efficient integrated energy system to recycle the energy waste of a typical in-dustrial factory. The optimization has been illustrated on a Pareto frontier to achieve the optimum scheme of the multi-generation system regarding technical and economic viewpoints. Results indicate the optimal condition of this system has occurred at 0.37 exergy efficiency with 0.03 $/s. Furthermore, by surging the mass flow rate of waste gases up to 70 kg/s, net power output augmented up to 7500 kW. Besides, hydrogen production and produced desalinated water rise up to 8.5 g/s and 16 kg/s, respectively.(c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

In this research study, a multi-generation energy system coupled with a CO2 capture unit based on Rankine cycle, organic Rankine cycle, ejector cooling system, and absorption chiller was analyzed using energy, exergy, and exergy-economic aspects. MATLAB was developed and a genetic algorithm was applied for system optimization to achieve the optimum operating condition. The objective of the study was to propose an optimized efficient integrated energy system to recycle energy waste from a typical industrial factory. The results indicated the optimal condition of the system and showed improvements in power output, hydrogen production, and desalinated water production by increasing the mass flow rate of waste gases.