Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2014.1514.1521KumarT. Ashok ChandramouliR. JothikumarK. 1220141414The boiler taken up for analysis has a steam generating capacity
of 250 tph, 11 MPa with 540°C of steam temperature. This study focuses on
identifying the energy and exergy flow of each component of the system in order
to identify the areas of major exergy loss. The plant components are grouped
under three subsystems. The analysis was first made in the subsystems individually
and as a whole. The coefficient of influence of important components was also
studied. From the energy analysis, it has been found that the boiler system
utilizes 88.41% of the total energy supplied to the plant and nearly 6.7% of
heat supplied is carried away by the exhaust gas. The overall energy efficiency
of the plant is found to be 31.15%. It has been noticed that the maximum exergy
loss occurs in the furnace combustion chamber, i.e., 54.1% of the exergy supplied
to Circulating Fluidized Bed (CFB). The exergy loss in the turbine is estimated
to be around 8.3%. The maximum loss of exergy that occurs in boiler combustion
chamber is due to irreversibility of the combustion process. The exergy efficiency
of the boiler system is estimated to be 43.09% with respect to total exergy
supplied to the plant. The overall exergy efficiency of the plant is evaluated
to be 29.29%. Thus the study gives a frame work for the power plants, to conduct
exergy efficiency studies in future.]]>Bejan, A., G. Tsatsaronis and M. Moran,1996Gungor, A.,20098613441353Auracher, H.,19844323327Ganapathy, T., N. Alagumurthi, R.P. Gakkhar and K. Murugesan,20092123130Erdem, H.H., A.V. Akkaya, B. Cetin, A. Dagdas and S.H. Sevilgen et al.,20094821792186Aljundi, I.H.,200929324328Khaliq, A. and S.C. Kaushik,200478179197Kopac, M. and A. Hilalci,20072713771385Kotas, T.J.,1985Pages: 296Pages: 296Nag, P.K. and S. De,199717385397Nikulshin, V., C. Wu and V. Nikulshina,200227886Regulagadda, P., I. Dincer and G.F. Naterer,201030970976Sengupta, S., A. Datta and S. Duttagupta,20073114 28