Services on Demand
Journal
Article
Indicators
Cited by SciELO
Access statistics
Related links
Cited by Google
Similars in SciELO
Similars in Google
Share
Revista Facultad de Ingeniería
Print version ISSN 0121-1129
Abstract
LLANO-SANCHEZ, Luis Eduardo; DOMINGUEZ-CAJELI, Darío Manuel and RUIZ-CARDENAS, Luis Carlos. Thermal transfer analysis of tubes with extended surface with fractal design. Rev. Fac. ing. [online]. 2018, vol.27, n.47, pp.31-37. ISSN 0121-1129. https://doi.org/10.19053/01211129.v27.n47.2018.7749.
Heat exchangers are formed by tubes with extended surfaces that improve the transfer of heat between two media (e.g., a solid and a liquid in motion). This paper presents the design of an extended surface tube with fractal geometry, corresponding to the Koch snowflake and the Cesaro curve. For the design, we used the CAD computational tool, and afterwards we performed the CAE finite element analysis and verified the thermal behavior of the designed tube. We were able to reduce the heat transfer time and increase the heat flow in the system in the following manner: for smooth tube, 250 W/m2; for Koch surface, 500 W/m2; for six fins, 1450 W/ m2; and for Cesaro curve, 3600 W/m2. These results demonstrate the limits of the design and the advantages of its implementation in machinery such as condensers, heat exchangers, and boilers.
Keywords : boilers; Cesaro curve; finite elements; fractal design; heat transfer; Koch Snowflake; tubes with extended surface.