Title: Analysis of Kalina cycle for recovering waste heat from flue gas exhaust in pressurised pulverised combined cycle

Authors: Nitesh Kumar Choudhary; 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: A thermodynamic analysis is performed to investigate the performance of a Kalina cycle (KC) integrated with a standalone 400 MW pressurised pulverised combined cycle (PPCC). The KC extracts waste heat from the plant's flue gas exhaust. The thermodynamic analysis shows that the proposed integrated plant has an energy and exergy efficiencies of 44.56% and 40.88%, respectively. Moreover, KC generates an additional power of 8.89 MW with energy and exergy efficiencies of 12.25% and 33.81%, respectively. The economic study shows that the cost of electricity generation and payback period of KC are ₹2.24 per unit and 1.95 years, respectively.

Keywords: combined cycle; energy; exergy; economic; Kalina cycle; plant waste heat.

DOI: 10.1504/IJEX.2024.136449

International Journal of Exergy, 2024 Vol.43 No.1, pp.21 - 39

Received: 16 Jun 2023
Accepted: 30 Nov 2023
Published online: 01 Feb 2024 *