Modelagem Computacional e otimização de um Ciclo Rankine utilizado em uma planta de congeração de energia em uma industria de cimento

Abstract

The search for greater energy efficiency leads many industries to implement the so-called energy cogeneration, which allows the residual heat of their own production process to be used, for example, for the generation of electrical energy, which considerably increases energy efficiency, in addition to to reduce pollutant emissions. In this work, the computational modeling and simulation of a cogeneration plant based on the Rankine steam power cycle of the CementApodi industry was carried out, in order to determine its thermal yield, and to propose improvements that can optimize this process, leading to an increase in efficiency thermal power. An algorithm was developed to simulate the plant's operation under different pressure and temperature conditions, seeking to evaluate the effects of these variables on the cycle's performance and to seek a condition that maximizes thermal efficiency. Another optimization proposal was to design a variant of the common Rankine cycle, known as a binary cycle, in which two cycles with different fluids operate together, allowing for greater power and energy generation. The results regarding the binary cycle using water and an organic fluid were positive, with the yield achieved being approximately 40% higher than the efficiency value that was determined for the cogeneration plant in its normal configuration. This result was also compared to the best performance of the cycle when its simulation was made with hypothetical values of pressure and temperature, in order to decide which optimization method is most advantageous