Effect of the segmented fin height on the air-side performance of serrated welded spiral fin-and-tube heat exchangers


Keawkamrop T., Mesgarpour M., Dalkılıç A. S. , Ahn H. S. , Mahian O., Wongwises S.

CASE STUDIES IN THERMAL ENGINEERING, vol.35, pp.1-13, 2022 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 35
  • Publication Date: 2022
  • Doi Number: 10.1016/j.csite.2022.102128
  • Title of Journal : CASE STUDIES IN THERMAL ENGINEERING
  • Page Numbers: pp.1-13
  • Keywords: Fin, Spiral fin, Segmented fin, Fin pitch, Heat exchanger, PRESSURE-DROP, FRICTION CHARACTERISTICS, MULTIPASS PARALLEL, PITCHES, OPTIMIZATION, NUMBER, BANKS

Abstract

Serrated welded spiral fin-and-tube heat exchangers (SWSFTHXs) are experimentally investigated. The work primarily focuses on the effects of the segmented fin height (h(s)) with various fin pitches (f(p)) on the air-side performance (ASP). Experimental results show that SWSFTHXs provide a higher air-side heat transfer coefficient than the plain welded spiral fin-and-tube heat exchangers (PWSFTHXs) at the same f(p). The h(s) has a significant effect on the Nusselt number (Nu) and Colburn factor (j), whereas f(p) clearly has a greater effect on the friction factor (f) and Euler number (Eu) than h(s). Furthermore, the Nu, j, f, and Eu correlations for PWSFTHXs and SWSFTHXs are also proposed.