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The Exergy Balance: A Diagnostic Tool for Energy Optimization
Author(s) -
ROTSTEIN ENRIQUE
Publication year - 1983
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1983.tb14936.x
Subject(s) - exergy , exergy efficiency , energy balance , process engineering , balance (ability) , entropy (arrow of time) , production (economics) , energy consumption , environmental science , thermodynamics , computer science , economics , engineering , microeconomics , physics , medicine , physical medicine and rehabilitation , electrical engineering
The exergy balance is shown to be a combined statement of the first and second laws of thermodynamics. It provides insight into the energy performance of industrial operations, showing the ideal and actual energy bounds (exergy change and production of entropy) as well as electrical and other utilities consumption. Calculation of exergies in different situations within the food industry is shown. A tomato paste plant and two heat‐optimized configurations of the same are evaluated by means of the exergy balance. A similar analysis is carried out for the case of whey drying. It is concluded that the exergy balance is a useful diagnostic tool for the energy analysis and optimization of the food industry.