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Abstract

The performance of a Kalina-based multigeneration cycle for power, water and hydrogen production is investigated from thermo-environmental, sustainability and thermo-economic perspectives. The plant comprises a gas turbine (GT), Kalina cycle (KC) and vapour absorption system (VAS) as the bottoming cycle and an integrated domestic water heater and proton-electron membrane (PEM) electrolyzer for hydrogen production. The system's models were simulated with Engineering Equation Solver (EES) codes. The results indicate a net energy efficiency of 53.48% and exergy efficiencies of 50.05 %, with an additional 30,178 kW of products from the bottoming cycles. The GT contributed approximately 85.81 % of the overall exergy destruction. The system's exergo-thermal index (ETI) stood at 1.713, with the GT only having an ETI of 2.106. Similarly, the exergetic sustainability index (ESI) of the multigeneration plant was not greater than 2.04. The exergoeconomic analysis shows a low average energy cost from the GT, estimated at 0.836 $/GJ, compared to the Kalina subsystem, which stood at 6.53 $/GJ. The thermodynamic and cost evaluation of the system demonstrates substantial benefits from the plant, which kept the hydrogen production rate at 0.1524 kg/hr

Keywords

Energy Exergy Kalina cycle Sustainability Hydrogen

Article Details

How to Cite
Abam, F., Umeh, V., Ekwe, E. B., Effiom, S. O., Egbe, J., Anyandi, A. J., Enyia, J., Ubauike, U. H., & Ndukwu, M. C. (2023). Thermodynamic and environmental performance of a Kalina-based multigeneration cycle with biomass ancillary firing for power, water and hydrogen production. Future Technology, 3(1), 40–55. Retrieved from https://fupubco.com/futech/article/view/107
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