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Exergetic evaluation of multiple-effect evaporators in sugarcane mills

Autor(es):
Pellegrini, Luiz Felipe ; de Oliveira, Silvio, Jr. ; Frangopoulos, CA ; Rakopoulos, CD ; Tsatsaronis, G
Número total de Autores: 5
Tipo de documento: Artigo Científico
Fonte: ECOS 2006: PROCEEDINGS OF THE 19TH INTERNATIONAL CONFERENCE ON EFFICIENCY, COST, OPTIMIZATION, SIMULATION AND ENVIRONMENTAL IMPACT OF ENERGY SYSTEMS, VOLS 1-3; v. N/A, p. 3-pg., 2006-01-01.
Resumo

Multiple-effect evaporators are the main consumers of backpressure steam in sugarcane mills, The purpose of this equipment is to concentrate juice extracted in the milling process into syrup. During this process, steam of different exergy content can be produced and used as heat sources in other processes. In this sense, one could say that multiple-effect evaporators are responsible for the integration of the utilities plant and the process plant in sugarcane mills. Thus, any optimization procedure aiming to enhance power generation in sugarcane mills must take into account possible modifications in this process. The objective of this paper is to develop a methodology to evaluate this equipment based on exergy analysis. Previous works have developed exergy analysis for this process, but the exergy calculations were not very reliable. In this paper, these calculations will follow recent works, which have standardized these procedures. The methodology proposed will allow the performance evaluation of existing evaporators, the suggestion of modifications, and project of new ones. The methodology has been applied to real multiple-effect evaporator of a Brazilian sugarcane mill, and the results are discussed in the end. (AU)

Processo FAPESP: 03/12094-8 - Análise e otimização termo-economica-ambiental de configurações de plantas de utilidades de usinas de açúcar e álcool
Beneficiário:Luiz Felipe Pellegrini
Modalidade de apoio: Bolsas no Brasil - Doutorado Direto