Abstract

PAZ, Dora  and  CARDENAS, Gerónimo J.. Economic value of exergy losses in heating operations in cane sugar mills. Rev. ind. agríc. Tucumán [online]. 2005, vol.82, n.1-2, pp.11-16. ISSN 1851-3018.

This paper is based on the results of previous work done by Paz and Cárdenas in 2005, in which exergy losses in thermal operations: Heating-Evaporation-Crystallization (H-E-C) of a cane sugar mill located in Tucumán, were evaluated. Exergy losses represent equivalent non-produced electric power; therefore, the resulting damage can be calculated directly from the price of the electric energy. Results obtained with this novel methodology (exergy loss reduction) were compared with those obtained with the traditional method (live steam saving) when evaluating monetary savings. In fact, monetary savings in A and B proposals were $1,05 x 10⁶ (0,35 x 10⁶ USD) and $1,92 x 10⁶ (0,64 x 10⁶ USD) per season, respectively. Internal Rates of Return (IRR) were 191% and 20,8%, respectively.

Keywords : Energy; Exergy; Hydraulic motors; IRR.

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