Author : Shailendra Pratap Singh and Vijay Kumar. Dwivedi

In this study, the exergy analysis has been applied to the typical 210MW (LMZ) in India. The fuel used in this power plant was low calorific value sub bituminous coal. The irreversibility rates (or exergy destruction rates) of each cylinder of turbine are obtained for different ambient temperatures by the exergy analysis. The ambient temperature was selected within the range of 5–450C. The percentage efficiency defects of each turbine (or the ratios of the irreversibility rates to the fuel exergy rate) and the exergy efficiencies were determined for different ambient temperatures. Exergy parameters steam turbine cylinders have been determined to compare the actually achieved performance parameters with ideal performance parameters, which are not achievable indeed but these are authentically comparable. Increased destruction of exergy of any component shows that it has better scope of improvement. This thermodynamic analysis technique provides more meaningful results than the energy analysis, and pinpoints the locations and causes of inefficiencies more accurately. This procedure for the exergy analysis of the power plant could be applied to the different thermal applications for optimization and design purposes.

Keywords: Exergy; Irreversibility, Exergy efficiency, Efficiency defect; Steam power plant

Article published in International Journal of Current  Engineering  and Technology, Vol.4,No.1 (Feb- 2014)