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Author(s): A. N. Vilarinho
João B. L. M. Campos
Carlos Pinho
Title: Energy and exergy analysis of a pre-distillation unit. A case study
Issue Date: 2017
Abstract: Energy and exergy balances were evaluated for the pre-distillation unit (Un-0100) of an aromatics plant from aPortuguese refinery. The main objective of the study was to find out the relevant thermal energy losses in order toimplement energy recovery procedures, without questioning the operating processes of the plant. In its overallanalysis, the Un-100 obtained an energy efficiency of 13.4% and an exergy efficiency of 2.3%. The equipment thathas higher energy losses in this unit is the air coolers, representing 59.9% of the energy losses, i.e., most of theenergy lost in this unit is due to the cooling process. The irreversibility observed in these equipment groups was11.2%. Moreover, the furnace represents 15.6% of energy losses, but this component stands out in the irreversibilityanalysis, with 56.3% of the total. Based on these values, it can be said that this equipment presents a high potentialof improvement of its energy and exergy performance. These results, concern a small part of a more general casestudy about the performance of the aromatics plant, and clearly show the need to establish complementary energyand exergy balances in order to increase the energetic performance of the unit.
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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