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.
Case studies in thermal engineering. 2022. Vol. 35. P. 102128 (1-13)
Language
eng
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Механико-математический факультет
Effect of the segmented fin height on the air-side performance of serrated welded spiral fin-and-tube heat exchangers