Computational Model to Evaluate the Effect of Passive Techniques in Tube-In-Tube Helical Heat Exchanger

Miyer Valdes, Juan G. Ardila, Dario Colorado and Beatris A. Escobedo-Trujillo
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Miyer Valdes: Instituto Tecnológico Metropolitano, Departamento de Electrómecanica, Calle 54 a No. 30-01, Medellin P.A. 050013, Colombia
Juan G. Ardila: Instituto Tecnológico Metropolitano, Departamento de Electrómecanica, Calle 54 a No. 30-01, Medellin P.A. 050013, Colombia
Dario Colorado: Centro de Investigación en Recursos Energéticos y Sustentables, Universidad Veracruzana, Av. Universidad km 7.5, Col. Santa Isabel, Coatzacoalcos C.P. 96535, Mexico
Beatris A. Escobedo-Trujillo: Facultad de Ingeniería, Universidad Veracruzana, Av. Universidad km 7.5, Col. Santa Isabel, Coatzacoalcos C.P. 96535, Mexico

Energies, 2019, vol. 12, issue 10, 1-12

Abstract: The purpose of this research is to evaluate the effect of twist in the internal tube in a tube-in-tube helical heat exchanger keeping constant one type of ridges. To meet this goal, a Computational Fluid Dynamic (CFD) model was carried out. The effects of the fluid flow rate on the heat transfer were studied in the internal and annular flow. A commercial CFD package was used to predict the flow and thermal development in a tube-in-tube helical heat exchanger. The simulations were carried out in counter-flow mode operation with hot fluid in the internal tube side and cold fluids in the annular flow. The internal tube was modified with a double passive technique to provide high turbulence in the outer region. The numerical results agree with the reported data, the use of only one passive technique in the internal tube increases the heat transfer up to 28.8% compared to smooth tube.

Keywords: computational fluid dynamics; heat transfer; temperature contour (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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