Title: Exergy analysis of modified-supercritical power plant with solar assisted feedwater heating and CO₂ capture

Authors: Rajesh Kumar; Sujit Karmakar

Addresses: Department of Mechanical Engineering, National Institute of Technology Durgapur, West-Bengal-713209, India ' Department of Mechanical Engineering, National Institute of Technology Durgapur, West-Bengal-713209, India

Abstract: Solar energy is the most readily available energy in India, which can be utilised in coal-fired thermal power plants for feedwater heating and Monoethanolamine (MEA) for MEA regeneration in post-combustion CO₂ capture unit. The present study deals with 4-E (energy, exergy, environment, and economic) analysis of a 500 MWe Supercritical (SupC) coal-based thermal power plant with solar-assisted feedwater heating and MEA regeneration in CO₂ capture unit. Results show that the plant efficiency is improved by 8.2% points, and the coal consumption rate is reduced by 18%. The levelised cost of electricity (LCoE) generation is increased to INR 6, and the cost for CO₂ avoided is INR 3607 per tonne of CO₂.

Keywords: solar energy; exergy; supercritical; high ash coal; CO₂ emissions; Monoethanolamine; MEA; levelised cost of electricity; LCoE.

DOI: 10.1504/IJEX.2023.130944

International Journal of Exergy, 2023 Vol.41 No.1, pp.91 - 109

Received: 04 Mar 2022
Received in revised form: 30 Nov 2022
Accepted: 11 Dec 2022
Published online: 14 May 2023 *

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