Publicado

2020-01-01

Entropy generation analysis for the design of a flat plate solar collector with fins

Análisis de la generación de entropía para el diseño de colectores solares de placa plana con aletas

DOI:

https://doi.org/10.15446/dyna.v87n212.80111

Palabras clave:

entropy generation minimization, fin efficiency, flat plate solar collector, particle swarm optimization (en)
colector solar de placa plana, eficiencia de aleta, minimización de entropía generada, optimización por enjambre de partículas (es)

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This article describes the optimal design of a flat-plate solar collector with fins, based on the minimum entropy generation criterion. The design parameters were optimized, considering entropy generation due to heat transfer and airflow. The latter has not been considered in previous works. The flat plate in the collector is assimilated to a finned heat sink. The dimensionless entropy generation variation is analyzed to increase values of the number of fins, as well as for different plate thicknesses and heights. We also considered variations in airflow velocity. Our data shows that airflow velocity greatly influences entropy generation. Values other than the optimum found, caused a considerable growth of total entropy. For a collector area of 4 m2, and an outlet temperature of 50°C, the optimum parameters that minimize the entropy generation rate were: 9 fins on each side of the collector plate, a height of 5 x10-2 m, a thickness of 25x10-3m, and an air velocity variable between 0.015 and 0.046 m/s. This development is relevant to the design of flat plate solar collectors, for grain drying applications.

Este artículo describe el diseño óptimo de un colector solar de placa plana con aletas, a partir del uso del criterio de mínima generación de entropía. Los parámetros de diseño para el colector, fueron optimizados considerando tanto la generación de entropía por transferencia de calor, como la generación de entropía debida al flujo del aire que circula por él, la cual, de manera general, no ha sido considerada en trabajos previos. La placa plana del colector fue tratada como un disipador de calor con aletas, y el valor adimensional de la variación de la entropía generada fue analizado para valores crecientes del número de aletas, de su grosor y altura, así como para diversos valores de la velocidad del flujo de aire en el colector. El estudio demuestra que esta velocidad tiene una gran influencia sobre dicho valor. Valores fuera del rango encontrado como óptimo en los diseños, ocasionan un incremento considerable de la entropía generada en el sistema. Para un área en el colector de 4 m2, y una temperatura de salida de 50°C, los parámetros óptimos que minimizan la entropía generada, fueron 9 aletas por cada cara de la placa del colector, con una altura de 5 x10-2 m, un grosor de 25x10-3m, y una velocidad del aire variable entre 0.015 y 0.046 m/s. El estudio desarrollad es de gran relevancia para el diseño de colectores solares de placa plana, en aplicaciones destinadas al secado de granos.

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Cómo citar

IEEE

[1]
M. Muñoz, M. Roa, y R. Correa, «Entropy generation analysis for the design of a flat plate solar collector with fins», DYNA, vol. 87, n.º 212, pp. 199–208, ene. 2020.

ACM

[1]
Muñoz, M., Roa, M. y Correa, R. 2020. Entropy generation analysis for the design of a flat plate solar collector with fins. DYNA. 87, 212 (ene. 2020), 199–208. DOI:https://doi.org/10.15446/dyna.v87n212.80111.

ACS

(1)
Muñoz, M.; Roa, M.; Correa, R. Entropy generation analysis for the design of a flat plate solar collector with fins. DYNA 2020, 87, 199-208.

APA

Muñoz, M., Roa, M. & Correa, R. (2020). Entropy generation analysis for the design of a flat plate solar collector with fins. DYNA, 87(212), 199–208. https://doi.org/10.15446/dyna.v87n212.80111

ABNT

MUÑOZ, M.; ROA, M.; CORREA, R. Entropy generation analysis for the design of a flat plate solar collector with fins. DYNA, [S. l.], v. 87, n. 212, p. 199–208, 2020. DOI: 10.15446/dyna.v87n212.80111. Disponível em: https://revistas.unal.edu.co/index.php/dyna/article/view/80111. Acesso em: 13 mar. 2026.

Chicago

Muñoz, Milton, Manuel Roa, y Rodrigo Correa. 2020. «Entropy generation analysis for the design of a flat plate solar collector with fins». DYNA 87 (212):199-208. https://doi.org/10.15446/dyna.v87n212.80111.

Harvard

Muñoz, M., Roa, M. y Correa, R. (2020) «Entropy generation analysis for the design of a flat plate solar collector with fins», DYNA, 87(212), pp. 199–208. doi: 10.15446/dyna.v87n212.80111.

MLA

Muñoz, M., M. Roa, y R. Correa. «Entropy generation analysis for the design of a flat plate solar collector with fins». DYNA, vol. 87, n.º 212, enero de 2020, pp. 199-08, doi:10.15446/dyna.v87n212.80111.

Turabian

Muñoz, Milton, Manuel Roa, y Rodrigo Correa. «Entropy generation analysis for the design of a flat plate solar collector with fins». DYNA 87, no. 212 (enero 1, 2020): 199–208. Accedido marzo 13, 2026. https://revistas.unal.edu.co/index.php/dyna/article/view/80111.

Vancouver

1.
Muñoz M, Roa M, Correa R. Entropy generation analysis for the design of a flat plate solar collector with fins. DYNA [Internet]. 1 de enero de 2020 [citado 13 de marzo de 2026];87(212):199-208. Disponible en: https://revistas.unal.edu.co/index.php/dyna/article/view/80111

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2. Nguyen Minh Phu, Ngo Thien Tu, Nguyen Van Hap. (2021). Thermohydraulic Performance and Entropy Generation of a Triple-Pass Solar Air Heater with Three Inlets. Energies, 14(19), p.6399. https://doi.org/10.3390/en14196399.

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