Numerical investigation on flow and heat transfer characteristics of supercritical methane–ethane mixture in a straight channel | Science and Technology for Energy Transition (STET)

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Table 3

Correlations for Nusselt number and Fanning fraction factor in PCHE channels with different fluids.

References	Channel shape	Working fluid	Correlations for Nusselt number	Application conditions
Kim et al. [35]	Straight	Water	0.7203 Re^0.1775 Pr^1/3	100 < Re < 850
Kim et al. [35]	Straight	Water	1.3383 Re^−0.5003	100 < Re < 850
Zhao et al. [25]	Straight	Nitrogen	0.3791 Re^0.5887 Pr^0.288	19379 < Re < 40 171
Zhao et al. [25]	Straight	Nitrogen	33.24 Re^−0.8304 + 0.0002596	19379 < Re < 40 171
Meshram et al. [14]	Straight	CO₂	0.0718 Re^0.71 Pr^0.55	5000 < Re < 26 000
Meshram et al. [14]	Straight	CO₂	0.8657 Re^−0.5755 + 0.00405	5000 < Re < 26 000
Kwon et al. [36]	Zigzag	Water	0.278 Re^0.452 Pr^0.333	150 < Re < 800
Kwon et al. [36]	Zigzag	Water	95.431 Pr^0.333	150 < Re < 800
Kim and No [37]	Zigzag	Helium	4.089 + 0.00365 Re^1.0 Pr^0.58	0 < Re < 2500, 0.66 < Pr < 13.41
Kim and No [37]	Zigzag	Helium	+ 0.0487 Re^−0.16	0 < Re < 2500, 0.66 < Pr < 13.41
Chen et al. [38]	Zigzag	Helium	0.005516 ± 0.0016 Re^{0.69195 ± 0.00559}	1400 < Re < 2200
Chen et al. [38]	Zigzag	Helium	17.639 Re^{0.8861 ± 0.0017}	1400 < Re < 2200
Nikitin et al. [18]	Zigzag	CO₂	Hot channel: h = 2.52 Re^0.681 (−1.402e⁻⁶ ± 0.087e⁻⁶) Re + (0.04495 ± 0.00038)	Hot channel: 2800 < Re < 5800
Nikitin et al. [18]	Zigzag	CO₂	Cold channel: h = 5.49 Re^0.625 (−1.545e⁻⁶ ± 0.099e⁻⁶) Re + (0.09318 ± 0.0009)	Cold channel: 6200 < Re < 12 100
Baik et al. [20]	Zigzag	CO₂	0.8405 Re^0.5704 Pr^1.08	15 000 < Re < 85 000
Baik et al. [20]	Zigzag	CO₂	0.0748 Re^−0.19	15 000 < Re < 85 000

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