Title: An energy and exergy-based performance analysis and emission control of the turbine cycle in a coal-based steam power plant
Authors: Malay Kanti Naskar; Sudip Simlandi; Nilkanta Barman
Addresses: Department of Mechanical Engineering, Jadavpur University, Kolkata, 700 032, India ' Department of Mechanical Engineering, Jadavpur University, Kolkata, 700 032, India ' Department of Mechanical Engineering, Ghani Khan Chowdhury Institute of Engineering and Technology, Malda, 732 144, India
Abstract: Here, we present a study based on energy and exergy analysis of performance of a coal-based steam power plant of 500 MWe in India. Thus, a thermodynamic model is considered to assess the performance of the plant. The work primarily studies performance of the turbine cycle and subsequent associated components of the plant separately under different unit loads. A break-up of energy and exergy losses for the turbine cycle and the associated components of the plant are presented. It is found that heat rate minimises at full load, which maximises economy of the operation. In context to improvement of the turbine, the heat rate with increasing load is estimated. It is found that the heat rate minimises at full load, which a condition leading to operational efficiency. Finally, based on improvement in the heat rate, a reduction in coal consumption, ash generation, SO2 and CO2 emissions is predicted.
Keywords: turbine cycle; energy; exergy; analysis; efficiency; irreversibility; emission.
Interdisciplinary Environmental Review, 2018 Vol.19 No.2, pp.123 - 138
Received: 13 May 2017
Accepted: 16 Mar 2018
Published online: 24 Jul 2018 *