Exergetic, Thermal, and Fuel Savings Analyses of a 20.70-MW Bagasse-based Cogeneration Plant
DOI:
https://doi.org/10.13052/dgaej2156-3306.2334Keywords:
Cogeneration, bagasse, exergy, ef ficiency.Abstract
A thermodynamic study of a 20.70-MW bagasse-based cogenera-
tion plant in the Indian sugar industry located in Belgaum is presented
in this article. Analyses based on first and second laws of thermodynam-
ics using actual operating data are presented first to acquaint the reader
with plant’s components and operation. The primary fuel energy savings
achieved by the cogeneration plant in comparison with that of separate
generation plants is determined and discussed. Secondly using the
combustion, flue gas and environmental data from the plant, an irrevers-
ibility study is outlined that estimates the loss of exergy in the plant’s
components. The component contributing most to the overall plant inef-
ficiency is pinpointed. The results show that the plant’s cycle performs
with an energy utilization factor of 69% and exergetic efficiency of 28%.
Because of the inherent nature of combustion irreversibility, the largest
fuel exergy loss (about 70%) is noticed in the boiler.
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