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Thermohydraulic and Economic Evaluation of a New Design for Printed Circuit Heat Exchangers in Supercritical CO 2 Brayton Cycle

Author

Listed:
  • Dora Villada-Castillo

    (Facultad de Ciencias Agrarias y del Ambiente, Universidad Francisco de Paula Santander, Avenida Gran Colombia No. 12E-96 Barrio Colsag, Cúcuta 540001, Colombia)

  • Guillermo Valencia-Ochoa

    (Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad del Atlántico, Carrera 30 Número 8–49, Puerto Colombia, Barranquilla 080001, Colombia)

  • Jorge Duarte-Forero

    (Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad del Atlántico, Carrera 30 Número 8–49, Puerto Colombia, Barranquilla 080001, Colombia)

Abstract

The present study focused on the analysis of a new geometrical modification of the conventional zig-zag channel for Printed Circuit Heat Exchangers. The research was carried out using OpenFOAM and Salome software, which were used for the CFD analysis and the construction of the computational domain. For the development of the study, three types of channel geometries were defined: a modified zig-zag channel, a conventional zig-zag channel, and a straight channel. The results show that the modified zig-zag channel achieves better thermal hydraulic performance compared to that of the conventional zig-zag channel, evidenced by a 7.6% increase in the thermal performance factor. The modified zig-zag channel proposed in the research caused a 1.5% reduction of the power consumption of supercritical Brayton cycle compressors. Additionally, the modified zig-zag channel achieves a maximum efficiency of 49.1%, which is 1.5% higher compared to that of the conventional zig-zag channel. The above results caused a 20.9% reduction of the operating costs of the supercritical Brayton cycle. This leads to a 5.9% decrease in the cost associated with using the PCHE compared to that of the conventional zig-zag channel. In general, the new geometric characteristics proposed for the conventional zig-zag channel minimize the high loss of the hydraulic performance without significantly compromising its heat transfer capacity. The geometric analysis of the proposed new zig-zag channel geometry was limited to evaluating the influence of the bend angle of 20–30°. Therefore, a more detailed geometric optimization process involving other geometric parameters of the channel is still needed. Future research will be focused on addressing this approach.

Suggested Citation

  • Dora Villada-Castillo & Guillermo Valencia-Ochoa & Jorge Duarte-Forero, 2023. "Thermohydraulic and Economic Evaluation of a New Design for Printed Circuit Heat Exchangers in Supercritical CO 2 Brayton Cycle," Energies, MDPI, vol. 16(5), pages 1-24, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:5:p:2326-:d:1083765
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    References listed on IDEAS

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    1. Liu, Guangxu & Huang, Yanping & Wang, Junfeng & Liu, Ruilong, 2020. "A review on the thermal-hydraulic performance and optimization of printed circuit heat exchangers for supercritical CO2 in advanced nuclear power systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 133(C).
    2. Guillermo Valencia Ochoa & Jhan Piero Rojas & Jorge Duarte Forero, 2020. "Advance Exergo-Economic Analysis of a Waste Heat Recovery System Using ORC for a Bottoming Natural Gas Engine," Energies, MDPI, vol. 13(1), pages 1-18, January.
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