Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
THERMODYNAMIC EVALUATION OF THE REHEATING EFFECT IN COGENERATION SYTEMS FOR BRAZILIAN SUGAR AND ALCOHOL INDUSTRY
Submission Author:
Madson John Arcanjo Batista , SP
Co-Authors:
Madson John Arcanjo Batista, André Lima, José Carlos Escobar Palacio, Alvaro Adolfo Diaz Perez, Osvaldo Jose Venturini, Dimas Jose Rua Orozco, Filipe Ferreira de Oliveira Leite
Presenter: José Carlos Escobar Palacio
doi://10.26678/ABCM.ENCIT2016.CIT2016-0676
Abstract
This paper develops a thermodynamic evaluation of the implementation of the reheating in cogeneration systems of the brazilian sugar and alcohol sector. It’s aimed to establish actions focused on the overall performance increased to provide greater availability of surplus bagasse. Four scenarios were analyzed, considering the cogeneration system of a sugar and alcohol plant divided into two groups. Group I has fixed power and his objective is to obtain a higher index of surplus bagasse; Group II uses a consumption fixed rate of bagasse, employing all it's availability to generate steam. Each grouping consists of a base case (Basis I e II) and a scenario with reheating (Ar e Br), which in turn was obtained by an optimization of the vapor pressure extraction pressure. It was used GateCycle TM software for simulation of different schemes. It was established as the main parameters the milling capacity of 500 tc / h, specific steam consumption of 450 kgv / tc and operation with condensing/extraction steam turbines. Whereas cogeneration systems produce electricity and useful thermal energy simultaneously, the case studies for the scenarios are now based on the analysis of two indicators, the exergetic efficiency, and surplus bagasse index. In addition to the observed increase efficiency in each group and increases the quality turbine outlet, there was obtained additions of exergetic efficiency of 1.78% and 1.55% for the groups I and II, respectively.
Keywords
cogeneration, reheating, Rankine cycle, sugar and alcohol, cogeneration, reheating, Rankine cycle, sugar and alcohol, cogeneration, reheating, Rankine Cycles, sugar and alcohol, cogeneration, reheating, Rankine cycle, sugar and alcohol, Rankine Cycles
