(0000) Efficiency improvement and CO2 emission reduction of coal fired power plant by repowering through pressurized pulverized coal combustion and waste heated feed water heating

  • Samiran Samanta Assistant Professor
  • Sudip Ghosh Indian Institute of Engineering Science and Technology, Shibpur

Abstract

A theoretical analysis of partial repowering of a 250MW coal fired power plant is presented in this paper. In this repowering scheme, out of five coal mills, two mills are proposed to be taken out and the corresponding amount of pulverized coal is combusted in a pressurized combustion chamber (PPCC). The product gas is expanded in a Gas Turbine (GT) after proper cleaning of the hot gas. The GT exhaust is fed to the existing boiler with modified burners. Waste heat of flue gas, coming out from the repowered plant boiler, is proposed to be used for feed water heating which leads to saving of bleed steam and increase in the output of the steam cycle. The partial repowering increases the capacity and overall efficiency of the plant by about 30.7% each and decreases plant heat rate by about 23.5%. The specific CO2 emission of the plant decreases about 26.5% after repowering.

Author Biographies

Samiran Samanta, Assistant Professor
Mr. Samiran Samanta is presently an Assistant Professor of Department of Automobile Engineering at MCKV Institute of Engineering. He completed his B. Tech. in 2009 from Kalyani Government Engineering College and M.E. from BESU Shibpur in 2011, as a silver medalist of the university. Currently he is perusing Ph.D. from Indian Institute of Engineering Science and Technology, Shibpur (Formerly known as BESU Shibpur). He has research interest in renewable energy, refrigeration and clean coal technology. He has got several publications in archival Journal and conference Proceedings of International Repute.
Sudip Ghosh, Indian Institute of Engineering Science and Technology, Shibpur
Dr. Sudip Ghosh is an Associate Professor of Mechanical Engineering Department, IIEST, Shibpur, INDIA. He received his Bachelor degree in Mechanical Engineering from Jalpaiguri Govt. Engineering College in 1991, Master of Technology degree from BE College, Shibpur in 1993 and Ph.D. from Jadavpur University in 2005. His areas of research are Clean Coal Technology, Renewable Energy Technologies, Fuel Cell, Biomass Gasification Systems and Greenhouse Technology etc. He has got several publications in archival Journal and conference Proceedings of International Repute.
Published
2015-09-24
How to Cite
SAMANTA, Samiran; GHOSH, Sudip. (0000) Efficiency improvement and CO2 emission reduction of coal fired power plant by repowering through pressurized pulverized coal combustion and waste heated feed water heating. Journal of Power Technologies, [S.l.], sep. 2015. ISSN 2083-4195. Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/670>. Date accessed: 02 aug. 2021.
Section
Power Plant

Keywords

Repowering; power plant; PPCC; gas turbine; waste heat; capacity; efficiency; specific emission

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