Cogeneración a partir de la cascarilla del arroz en la industria arrocera Gloria Matilde S.A del cantón Daule, provincia del Guayas.

Abstract

The purpose of this project is to demonstrate that the use of rice husks, a food processing waste, as fuel is viable and beneficial for both the industry and the environment. It also aims to determine whether it is technically and economically feasible to install a cogeneration system using a steam-water thermodynamic cycle at the Gloria Matilde rice industry in the Daule canton of Ecuador. This is to supply the industry's internal process with both electrical and thermal energy, obtained through the combustion of rice husks (biomass), and to offer surplus energy to the National System of Energy (SNI). The steam-water cycle is calculated based on the design power obtained from data obtained from the plant. Once the operating parameters of each element of the Rankine cycle have been calculated, we calculate the necessary fuel demand based on the turbine power and the number of hours it will be in operation. With the generation of steam for the generation of electricity and its use in the efficient drying of rice, these points are the innovative components of the project; currently this industry burns waste to dry rice, in an inefficient manner (artisanal oven) and does not take advantage of the combustion of this that could be used in other processes. In this study, the analysis was carried out to verify the economic viability of the project, calculating the NPV and IRR, which demonstrated the technical viability of the future implementation of this system. Because the rice husk biomass available at the plant is 7,500 t/year, whose calculated energy is 5,189.97 MWh/year. This entire process requires 7,240.66 t/year of fuel (rice husk), and the power to be generated by the turbine is 1.11 MW. The estimated cost of implementing this project is 2,905,650.00 [USD] and from year 7.5 of operation the facility would be amortized and would begin to generate benefits.