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Performance Evaluation of Wire Cloth Micro Heat Exchangers

Author

Listed:
  • Hannes Fugmann

    (Fraunhofer ISE—Institute for Solar Energy Systems, Heidenhofstr. 2, 79110 Freiburg, Germany)

  • Sebastian Martens

    (IMVT—Institute of Mechanical Process Engineering, University of Stuttgart, Böblinger Str. 72, 70199 Stuttgart, Germany)

  • Richard Balzer

    (Spörl KG Präzisionsdrahtweberei, Staudenweg 13, 72517 Sigmaringendorf, Germany)

  • Martin Brenner

    (MAHLE International GmbH, Heilbronner Str. 393-397, 70469 Stuttgart, Germany)

  • Lena Schnabel

    (Fraunhofer ISE—Institute for Solar Energy Systems, Heidenhofstr. 2, 79110 Freiburg, Germany)

  • Carsten Mehring

    (IMVT—Institute of Mechanical Process Engineering, University of Stuttgart, Böblinger Str. 72, 70199 Stuttgart, Germany)

Abstract

The purpose of this study is to validate a thermal-hydraulic simulation model for a new type of heat exchanger for mass, volume, and coolant/refrigerant charge reduction. The new heat exchanger consists of tubes with diameters in the range of 1 m m and wires in the range of 100 m , woven together to form a 200 × 200 × 80 m m 3 wire cloth heat exchanger. Performance of the heat exchanger has been experimentally evaluated using water as inner and air as outer heat transfer medium. A computational thermal and fluid dynamic model has been implemented in OpenFOAM ® . The model allows variation of geometry and operating conditions. The validation of the model is based on one single geometry with an opaque fabric and air-side velocities between 1 and 7 m / s . The simulated and measured pressure drops are found to be in good agreement with a relative difference of less than 16%. For the investigated cases, the effective heat transfer coefficients are in very good agreement (less than 5%) when adapting the contact resistance between tubes and wires. The numerical model describes the fluid flow and heat transfer of the tested heat exchanger with adequate precision and can be used for future wire cloth heat exchanger dimensioning for a variety of applications.

Suggested Citation

  • Hannes Fugmann & Sebastian Martens & Richard Balzer & Martin Brenner & Lena Schnabel & Carsten Mehring, 2020. "Performance Evaluation of Wire Cloth Micro Heat Exchangers," Energies, MDPI, vol. 13(3), pages 1-16, February.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:3:p:715-:d:317538
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    References listed on IDEAS

    as
    1. Hannes Fugmann & Paolo Di Lauro & Aniket Sawant & Lena Schnabel, 2018. "Development of Heat Transfer Surface Area Enhancements: A Test Facility for New Heat Exchanger Designs," Energies, MDPI, vol. 11(5), pages 1-17, May.
    2. Hannes Fugmann & Eric Laurenz & Lena Schnabel, 2017. "Wire Structure Heat Exchangers—New Designs for Efficient Heat Transfer," Energies, MDPI, vol. 10(9), pages 1-17, September.
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    Cited by:

    1. Sebastian Gamisch & Stefan Gschwander & Stefan J. Rupitsch, 2021. "Numerical and Experimental Investigation of Wire Cloth Heat Exchanger for Latent Heat Storages," Energies, MDPI, vol. 14(22), pages 1-30, November.
    2. Christian Walter & Sebastian Martens & Christian Zander & Carsten Mehring & Ulrich Nieken, 2020. "Heat Transfer through Wire Cloth Micro Heat Exchanger," Energies, MDPI, vol. 13(14), pages 1-20, July.

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