Daoming Shen1,*, Jinhong Xia1, Chao Gui1, Songtao Xue2
FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.6, pp. 1411-1424, 2023, DOI:10.32604/fdmp.2023.024924
- 30 January 2023
Abstract The thermal transmission coefficient for a micro-ribbed tube has been determined using theoretical relationships
and the outcomes of such calculations have been compared with experiments conducted using a R1234yf refrigerant undergoing condensation. In particular four theoretical single-phase flow and three multi-phase flow models have been used in this regard. The experimental results show that: the Oliver et al. criterion equation
overestimates the experimental results as its accuracy is significantly affected by the specific conditions realized
inside micro-fin tubes; the Miyara et al. criterion equation prediction error is less than 15%; the Cavallini et al.
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