Thermal–Hydraulic Performance of Shell-and-Tube Heat Exchangers with Disc-and-Ring Baffles and a Central Tube-Free Zone

August 17, 2025

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This research aims to investigate the heat transfer performance of a shell-and-tube heat exchanger with a central tube-free zone.
Conducted detailed numerical analysis of various tube-free zone sizes on heat transfer characteristics.
Evaluated the impact of different configurations on heat transfer homogeneity using the TOPSIS decision-making method.
Increasing the tube-free zone size from 140 mm to 440 mm improved heat transfer homogeneity by 65.9%.
The heat transfer coefficient on the shell side decreased by 22.1% with the larger tube-free area.
The optimal tube-free zone size (380 mm) provided the best balance between heat transfer and energy efficiency.

Numerical analysis reveals optimal design for heat transfer performance in specific configurations, suggesting efficiency improvements.

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Yu et al. (2025) studied this question.

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