Parametric variation studies of experimental flow boiling heat transfer phenomena using R407c inside an enhanced tube

Kumar, Amit; Das, Dipak Chandra; Das, Pritam

doi:10.1007/s00231-023-03343-1

Cited by 4 publications

(2 citation statements)

References 26 publications

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“…Additionally, R407c has 17% less HTC value than R22. R407c is still an effective refrigerant that can deliver appropriate cooling performance in a broad range of applications [33,37,39,40]. Figure 6 illustrates a comparison between experimental results and established correlations for flow boiling in microfin tubes.…”

Section: Resultsmentioning

confidence: 99%

“…In one study, Shaik and Babu [15] analyzed the effect of heat flux (HF) as well as saturation temperature mostly on heat transfer coefficients (HTCs) of R22 and R407c in a straight plain tube. Kumar et al [16] investigated the effect of tube diameter and helix angle on flow boiling heat transfer (FBHT) of R407c inside a horizontally enhanced tube. In accordance with the research, the HTC of R407c increased as the tube diameter and helix angle decreased.…”

Section: Introductionmentioning

confidence: 99%

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Parametric Evaluation of the Flow Boiling Heat Transfer Properties of R22 and R407c inside Horizontal Microfin Tube

Deb

Vidhyarthi

Pal

et al. 2023

International Journal of Energy Research

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The flow boiling heat transfer performance of R22 and R407c, in a microfin tube with a helix angle of 22° and an apex angle of 48°, was evaluated in a study. The study is aimed at investigating the impact of heat flux, mass flux, saturation temperature, and vapor quality on the heat transfer coefficient during flow boiling. Two different saturation temperatures, 293.15 K and 313.15 K, were used in the experiments, with heat fluxes ranging from 25 to 85 kW.m-2 and mass fluxes ranging from 150 to 350 kg.m-2.s-1. To validate the experimental data, the results were compared with existing correlations for microfin tubes. The calculated error margin among all correlations with the experimental dataset, which ±15% and ±30%, was also matched by 85% and 95% of the datasets, respectively. Findings reveal that at lower saturation temperatures, the average heat transfer coefficients augmented with increasing mass flux. The study also found that R22 has a higher heat transfer coefficient than R407c at low saturation temperatures due to its stronger thermal conductivity and lower viscosity.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%