The effect of triangular shutter type flow deflector perforated baffle plate on the thermofluid performance of a heat exchanger

Abstract

The study aimed to investigate the heat transfer (HT) properties of a tubular heat exchanger (HX) by using innovative baffle plate arrangements. The newly designed baffle plate was circular with triangular openings and adjustable triangular flow deflectors. These deflectors were strategically placed at the inlet of the HX to create a swirling flow downstream. Three baffle plates were installed along the flow direction with different length‐to‐diameter ratios (pitch ratios) to assess their impact on HT, pressure drop, and thermal enhancement factor. The study compared these results with a smooth channel under varying Reynolds numbers (16,500–29,500). The findings revealed that both the pitch ratio (0.6–1.2) and the inclination angle of the deflectors (30⁰–50⁰) significantly affected the HX's performance. Notably, the baffle plate with a deflector inclination angle of 30° and a pitch ratio of 1 showed a remarkable average improvement of 36.5% compared to other angles and ratios.

Review on Nanofluids: Preparation, Properties, Stability, and Thermal Performance Augmentation in Heat Transfer Applications

“…The ratio of the enhancement rate indicating the surge in HT to f is known as THP. Equations and present the primary criteria for evaluating the THP of the thermal system. − Models above a THP of 1 are considered advantageous, whereas models below this threshold are deemed unfavorable. The flow and thermal characteristics of nanofluids play a crucial role in evaluating and enhancing their performance.…”

Thermal hydraulic performance of a tubular heat exchanger with in‐line perforated baffle with shutter type saw tooth turbulator

“…In another analysis, 36 he utilized two 16 rectangular shutter-type flow deflectors to induce turbulence, resulting in a 1.17 improvement in thermal efficiency when PR was 1 and α was 30. Furthermore, Rahman 37 conducted further research on the impact of triangular shutter-type flow deflector baffle plates, which showed an additional improvement in the thermal efficiency of the HX.…”