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Design of a checkerboard counterflow heat exchanger for industrial applications

N. Parolini, V. Covello, A. della Rocca, M. Verani

Abstract

This work is devoted to the design of a checkerboard air-gas heat exchanger suitable for industrial applications. The design of the heat exchanger is optimized in order to obtain the maximum increase of the outlet air temperature, considering different geometrical design parameters and including manufacturing constraints. The heat exchanger efficiency has been assessed by means of the $ε$-NTU method. The perfomances are compared with traditional finned recuperators and appreciable enhancement of the exchanger efficiency has been observed adopting the new design.

Design of a checkerboard counterflow heat exchanger for industrial applications

Abstract

This work is devoted to the design of a checkerboard air-gas heat exchanger suitable for industrial applications. The design of the heat exchanger is optimized in order to obtain the maximum increase of the outlet air temperature, considering different geometrical design parameters and including manufacturing constraints. The heat exchanger efficiency has been assessed by means of the -NTU method. The perfomances are compared with traditional finned recuperators and appreciable enhancement of the exchanger efficiency has been observed adopting the new design.
Paper Structure (11 sections, 10 equations, 11 figures, 6 tables)

This paper contains 11 sections, 10 equations, 11 figures, 6 tables.

Table of Contents

  1. Introduction
  2. Geometrical parametrization
  3. Conjugate Heat Transfer model
  4. Results
  5. The computational setup
  6. Wavy transformation
  7. Scaling transformation
  8. Finned recuperator
  9. Performance analysis through the $\epsilon$-NTU method
  10. Experimental validation
  11. Conclusion

Figures (11)

  • Figure 1: Tenova patent for the recuperative burner dellarocca2018b
  • Figure 2: Different configurations of the recuperative burner: from left to right 4x24, 5x24, 5x30, and 6x30 channels.
  • Figure 3: Different geometric perturbations: wavy (top), twist (middle), hybrid twist-wavy (bottom), for the 4x24 channels configurations.
  • Figure 4: Different scaling perturbation in 4x24 channels configuration: $q<1$ (left), $q=1$ (middle), $q>1$ (right).
  • Figure 5: Integration of cold side (left) and hot side (middle) flow collectors and transversal section of the recuperator (right).
  • ...and 6 more figures