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Performance evaluation and optimization of fluidized bed boiler in ethanol plant using irreversibility analysis

Authors :
Nugroho Agung Pambudi
Maedanu Fasola
Lukad Valiant Perdana
Ria Laurensia
Danar Susilo Wijayanto
Muhammad Imran
Lip Huat Saw
Source :
Case Studies in Thermal Engineering, Vol 10, Iss C, Pp 283-291 (2017)
Publication Year :
2017
Publisher :
Elsevier, 2017.

Abstract

This research aims to evaluate the performance of a fluidized bed boiler in an ethanol production plant through exergy and irreversibility analysis. The study also includes the optimization of the pre-heater and the deaerator in order to improve the system efficiency. Operational data from the ethanol production plant was collected between 2015 and early 2016. The total exergy derived from the fuel was determined to be 7783 kJ/s, while the exergy efficiency of the system was found to be 26.19%, with 2214 kJ/s used in steam production, while 71.55% was lost to component irreversibility and waste heat from the pre-heater. The exergy efficiencies of individual components of the system such as the boiler, deaerator, and pre-heater were found to be 25.82%, 40.13%, and 2.617%, respectively, with the pre-heater having the lowest efficiency. Thus, the pre-heater has the highest potential to significantly improve the efficiency of the boiler system. The optimization of the pre-heater shows that a rise in temperature in the outlet of the pre-heater positively affects the exergy efficiency of the deaerator.

Details

Language :
English
ISSN :
2214157X
Volume :
10
Issue :
C
Database :
Directory of Open Access Journals
Journal :
Case Studies in Thermal Engineering
Publication Type :
Academic Journal
Accession number :
edsdoj.5c37a00e1f5f4fc8be62f045cd92fa7b
Document Type :
article
Full Text :
https://doi.org/10.1016/j.csite.2017.07.008