Exergetic analysis of a supercritical Brayton cycle with carbon dioxide as working fluid

Authors

DOI:

https://doi.org/10.17981/ingecuc.14.1.2018.15

Keywords:

Modelling, Energy, Exergy, Reheat, Brayton Cycle

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.

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Author Biographies

Moises Herrera Palomino, Universidad del Atlántico. Barranquilla (Colombia).

Moisés Herrera Palomino es tesista aspirante al título de ingeniero mecánico de la Universidad del Atlántico y estudiante de Ingeniería Industrial del mismo centro universitario. Sus intereses son el modelado de sistemas termodinámicos y el modelado a través de paquetes de Ingeniería Asistida por Computador (Computer-Aided Engineering, CAE). 

Edgardo Castro Pacheco, Universidad del Atlántico. Barranquilla (Colombia).

Edgardo Castro Pacheco es tesista aspirante al título de ingeniero mecánico de la Universidad del Atlántico. Actualmente es estudiante de séptimo semestre de Física de esta misma universidad. Sus intereses son el modelado de sistemas termodinámicos y el modelado a través de paquetes de Ingeniería Asistida por Computador (Computer-Aided Engineering, CAE).

Jorge Duarte Forero, Universidad del Atlántico. Barranquilla (Colombia).

Jorge Duarte Forero es ingeniero mecánico y doctor en Ingeniería Mecánica. Sus intereses son el modelado de sistemas termodinámicos y el modelado a través de paquetes de Ingeniería Asistida por Computador (Computer-Aided Engineering, CAE). Es investigador asociado de Colciencias y profesor asociado en la Universidad del Atlántico. 

Armando Fontalvo Lascano, Universidad de la Costa. Barrranquilla (Colombia)

Armando Fontalvo Lascano es ingeniero mecánico y magíster en Ingeniería Mecánica. Sus intereses son el modelado de sistemas termodinámicos y el modelado a través de paquetes de Ingeniería Asistida por Computador (Computer-Aided Engineering, CAE). Es investigador junior de Colciencias y profesor asistente III en la Universidad de la Costa. 

Ricardo Vásquez Padilla, Southern Cross University. Lismore (Australia)

Ricardo Vásquez Padilla es profesor titular y coordinador de curso de la Licenciatura en Ingeniería Mecánica en la Escuela de Medio Ambiente, Ciencia e Ingeniería de Southern Cross University en Australia. Sus intereses de investigación incluyen el modelado y la experimentación de bloques avanzados de energía que operan con diferentes fuentes de calor, sistemas solares térmicos concentrados, sistemas híbridos de energía renovable y aplicaciones de energía renovable para calefacción, refrigeración y desalinización. 

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INGE CUC Vol. 14 no. 1

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Published

2018-09-03

How to Cite

Herrera Palomino, M., Castro Pacheco, E., Duarte Forero, J., Fontalvo Lascano, A., & Vásquez Padilla, R. (2018). Exergetic analysis of a supercritical Brayton cycle with carbon dioxide as working fluid. INGE CUC, 14(1), 159–170. https://doi.org/10.17981/ingecuc.14.1.2018.15

Issue

Vol. 14 No. 1 (2018): (January - June)

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PAPERS

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