Exergy analysis of thermal systems in a pulp and paper production process. / Análise exergética dos sistemas térmicos em um processo de produção de celulose e papel.

AUTOR(ES)

Moisés Teles dos Santos

DATA DE PUBLICAÇÃO

2007

RESUMO

This work presents a comparative evaluation from thermodynamic performance view of thermal systems in a Kraft pulp and paper mill. The design information and the data of the industrial operation were collected for the current utility system and for the new system that has been buit. The exergy analysis is applied as the quantitative and qualitative evaluation tool for the main energy conversion systems: power boilers, chemical recovery boiler, turbines and throttling valves. Different global and relatives performance criteria are estimated by simultaneous energy and entropy balances (exergy balances). The irreversibility or generated entropy in the systems is determined by the destroyed exergy. This approach reveals the places where energy quality is mainly degraded and shows where alternatives for optimization must be sought for a better use of the available energetic resources.

ASSUNTO(S)

kraft entropia exergy entropy pulp and paper mill steam turbines boiler exergia turbinas a vapor energia caldeiras cogeração de energia elétrica kraft indústria de celulose e papel energy cogeneration

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