Energy and exergy analysis at the la joya sugar mill in Champotón, Campeche, Mexico

Abstract

An energy and exergistic analysis was carried out on the bagacera boiler of the sugar mill "La Joya" located in Champotón, Campeche, making the following assumptions: the process develops in a permanent state, the mass that flows through the control volume does not suffer variations with respect to time, there are no work interactions of the system with the environment, changes in kinetic energy and potential energy are considered negligible, thermodynamic data were provided by the mill's operation and control center. It was found that by increasing the mass flow of feed water (mwater) and decreasing the temperature of the dead state (T0) there was the least destruction of exergy. Simulations were carried out to determine the energy and exegetical efficiencies of the mill as a whole with the help of the Software Engineering Equation Solver (EES). When modifying m ̇_water, with T0 at 25 ℃, and inlet water (Twater) 90 ℃, an increase was observed both efficiencies; the energetic reached a maximum of 88, and the exergetic of 31; It was also observed that the maximum energy efficiency is obtained with the Twater 45℃. On the contrary, the exergetic efficiency at 15.3. It was concluded that it is more important to increase the mass flow of inlet water to increase global efficiencies in mill facilities than its temperature.