Energy, exergy, and exergo-economic analyses of Urmia sugar factory: a case study of Iran
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1Faculty of Mechanical Engineering, Sahand University of Technology, Sahand New Town, Tabriz, Iran
2Department of Mechanical Engineering, Faculty of Engineering, Khoy Branch, Islamic Azad University, Khoy, Iran
3Mechanical Engineering Department, Faculty of Engineering, Girne American University, Girne, N. Cyprus Via Mersin 10, Turkey
Sugar beet production is low in Iran, and about 50% of sugar demand is imported from other countries. Meanwhile, the factories are old in Iran, and novel technologies are not employed, and consequently, the sugar production unit cost is high. Sugar production is one of the most important industries. Therefore, in this work, a case study of the Urmia sugar factory is analyzed. The system is analyzed from thermodynamic and thermo-economic viewpoints. The results show that cogeneration, purification, and crystallization units have the highest exergy destruction, respectively. Also, the cogeneration unit with 20.17%, purification unit with 89.25%, and condensation unit with 91.31% have the lowest second law efficiency, respectively. The total exergy efficiency of the plant is found to be 56.44%. Furthermore, the input cost rate of cogeneration is 1492 ($/h).