Exergetic Comparison of Bagasse-based Cogeneration Plants
DOI:
https://doi.org/10.13052/dgaej2156-3306.2632Keywords:
Bagasse, cogeneration, exergy, efficiency.Abstract
Sugar industry employs different cogeneration schemes to satisfy
the plant’s process steam demand and generate possible surplus power
by upgrading the steam inlet parameters. Though, energy efficiencies
are most commonly used up to now, a thermodynamically more accu-
rate evaluation and more fair comparison between different systems can
be based on exergetic efficiency. In the light of this, in this article exerget-
ic performance comparison of three actual heat-matched, bagasse-based
cogeneration plants working in, three different sugar mills located in,
Belgaum district, Karnataka State, India, namely (i) Hira Sugar Works
Ltd (HSWL) (ii) Doodhaganga Krishna Sahakari Sakkare Karkhane Ltd
(DKSSK), (iii) Ugar Sugar Works Ltd (USWL) is presented. In the analy-
sis, in addition to the more conventional energy analysis, exergy analysis
is employed to evaluate overall and component efficiencies and to assess
the thermodynamic losses. The results indicate that the three-cogenera-
tion plants perform with energy and exergetic efficiency of 0.702, 0.628,
0.648 and 0.187, 0.234, 0.225 respectively for HWSL, DKSSK and USWL.
Boiler is the major component contributing most to the overall in-effi-
ciency in all the three plants.
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