Análisis exergético de un ciclo Brayton supercrítico con dióxido de carbono como fluido de trabajo

Abstract

Introduction: Nowadays, the thermodynamic modeling of the power cycles is conceived as an appropriate device which allows analyzing and determining the adaptability of several cycles as well the implementation and combination of a number of components whose characteristics and performing work appropriately on the generation of energy, beside of this, the relevant use of environmentally friendly technologies was taking into account as a relevant factor.

Objective: This research work intends to determine the impact of the performance parameters from the supercritical Brayton cycle related to its energetic and exergetic performance as the variation of the temperature of the cycle as well alternative working conditions are executed by using the reheater and heater systems.

Methodology: This research project used a thermodynamic model to carry out the energy and exergy analysis from four configurations of the supercritical Brayton cycle along carbon dioxide as a working fluid through several levels of temperature, also a maximum pressure of 25 MPa was ratified.

Results: The obtained results have shown the developed and assessed model allowed to demonstrate the configurations through reheat; as for energy there exist a consistent lack of it with regards to the use of the mentioned systems as these have been not configured. In addition, the temperature related to the inlet of the turbine and the pressure ratios have a relevant influence on these lacks by obtaining its minimum value at temperatures between 800-850 ° C.

Conclusions: It can be said that the total lack of exergy is minor as the configurations from the reheater system as it is applied, in other words, it is estimated that through the use of the mentioned system the percentage of reduction aims to three percent as the temperatures increase for the whole configurations.