Thermal Optimization of Horizontal Tubes with Tilted Rectangular Fins under Free Convection for the Cooling of Electronic Devices
Abstract
:1. Introduction
2. Experimental Investigation
3. Results and Discussion
4. Conclusions
Appendix A. Uncertainty Analysis
Acknowledgments
Author Contributions
Conflicts of Interest
References
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No. | N | α | L | D | H | t |
---|---|---|---|---|---|---|
1 | 9 | 90° | 50 mm | 60 mm | 30 mm | 1.0 mm |
2 | 12 | |||||
3 | 18 | |||||
4 | 9 | 60° | ||||
5 | 12 | |||||
6 | 18 | |||||
7 | 36 | |||||
8 | 9 | 30° | ||||
9 | 12 | |||||
10 | 18 | |||||
11 | 36 |
No. | α | N | Tt − Ts [°C] | q [W] | 1/Rth [W/°C] | NuD |
---|---|---|---|---|---|---|
1 | 90° | 9 | 10.4 ± 0.5 | 2.24 ± 0.01 | 0.216 ± 0.011 | 8.71 ± 0.44 |
20 ± 0.5 | 4.58 ± 0.02 | 0.228 ± 0.006 | 9.23 ± 0.25 | |||
30.6 ± 0.5 | 7.57 ± 0.01 | 0.247 ± 0.004 | 9.99 ± 0.17 | |||
40.4 ± 0.6 | 10.61 ± 0.02 | 0.263 ± 0.004 | 10.61 ± 0.15 | |||
49.9 ± 0.6 | 14.39 ± 0.02 | 0.289 ± 0.003 | 11.66 ± 0.14 | |||
2 | 90° | 12 | 10.1 ± 0.5 | 2.27 ± 0 | 0.226 ± 0.011 | 7.14 ± 0.36 |
20.5 ± 0.5 | 5.53 ± 0.01 | 0.269 ± 0.007 | 8.51 ± 0.22 | |||
30.3 ± 0.6 | 8.99 ± 0.02 | 0.297 ± 0.006 | 9.39 ± 0.18 | |||
39.7 ± 0.5 | 12.83 ± 0.02 | 0.323 ± 0.004 | 10.22 ± 0.14 | |||
50.3 ± 0.6 | 16.91 ± 0.02 | 0.336 ± 0.004 | 10.63 ± 0.12 | |||
3 | 90° | 18 | 10.8 ± 0.5 | 2.79 ± 0.01 | 0.26 ± 0.012 | 5.71 ± 0.27 |
21.1 ± 0.7 | 6.53 ± 0.04 | 0.309 ± 0.01 | 6.81 ± 0.22 | |||
29.5 ± 0.8 | 10.37 ± 0.05 | 0.352 ± 0.01 | 7.75 ± 0.21 | |||
40.4 ± 0.5 | 15.28 ± 0.01 | 0.378 ± 0.005 | 8.32 ± 0.11 | |||
49.9 ± 0.6 | 20.28 ± 0.03 | 0.406 ± 0.005 | 8.94 ± 0.12 | |||
4 | 60° | 9 | 10.3 ± 0.5 | 2.29 ± 0.02 | 0.221 ± 0.011 | 11.28 ± 0.59 |
20.6 ± 0.6 | 4.92 ± 0.03 | 0.239 ± 0.007 | 12.16 ± 0.36 | |||
29.9 ± 0.5 | 7.63 ± 0.02 | 0.255 ± 0.005 | 13.01 ± 0.24 | |||
40 ± 0.6 | 10.31 ± 0.03 | 0.258 ± 0.004 | 13.14 ± 0.21 | |||
49 ± 0.5 | 13.42 ± 0.02 | 0.274 ± 0.003 | 13.95 ± 0.15 | |||
5 | 60° | 12 | 10.7 ± 0.5 | 2.42 ± 0 | 0.226 ± 0.011 | 9.11 ± 0.43 |
20.5 ± 0.8 | 5.47 ± 0.05 | 0.267 ± 0.011 | 10.74 ± 0.44 | |||
29.7 ± 1.3 | 9.11 ± 0.1 | 0.306 ± 0.014 | 12.35 ± 0.56 | |||
39.9 ± 0.6 | 12.19 ± 0.03 | 0.305 ± 0.005 | 12.3 ± 0.2 | |||
50.6 ± 0.5 | 16.61 ± 0.02 | 0.328 ± 0.004 | 13.21 ± 0.14 | |||
6 | 60° | 18 | 10 ± 0.7 | 2.98 ± 0.04 | 0.297 ± 0.02 | 8.44 ± 0.56 |
20.3 ± 0.7 | 6.86 ± 0.04 | 0.338 ± 0.012 | 9.6 ± 0.33 | |||
30.9 ± 0.7 | 11.66 ± 0.04 | 0.377 ± 0.009 | 10.73 ± 0.24 | |||
39.4 ± 0.7 | 16.54 ± 0.05 | 0.419 ± 0.008 | 11.92 ± 0.23 | |||
51.2 ± 1 | 21.85 ± 0.07 | 0.427 ± 0.008 | 12.13 ± 0.23 | |||
7 | 60° | 36 | 10 ± 0.6 | 3.16 ± 0.02 | 0.315 ± 0.018 | 4.76 ± 0.28 |
19.9 ± 0.5 | 7.62 ± 0.01 | 0.383 ± 0.01 | 5.78 ± 0.15 | |||
29.6 ± 0.7 | 13.32 ± 0.04 | 0.451 ± 0.01 | 6.8 ± 0.16 | |||
39.7 ± 0.7 | 19.93 ± 0.05 | 0.502 ± 0.009 | 7.57 ± 0.14 | |||
51.7 ± 1.1 | 28.51 ± 0.08 | 0.551 ± 0.011 | 8.31 ± 0.17 | |||
8 | 30° | 9 | 10.2 ± 1 | 1.99 ± 0.07 | 0.195 ± 0.02 | 11.55 ± 1.17 |
20.2 ± 0.8 | 3.89 ± 0.03 | 0.192 ± 0.007 | 11.4 ± 0.44 | |||
29.7 ± 0.7 | 6.31 ± 0.13 | 0.212 ± 0.007 | 12.59 ± 0.39 | |||
40.1 ± 0.9 | 9.12 ± 0.2 | 0.227 ± 0.007 | 13.49 ± 0.42 | |||
51.5 ± 1.6 | 12.72 ± 0.55 | 0.247 ± 0.013 | 14.65 ± 0.77 | |||
9 | 30° | 12 | 10 ± 0.9 | 2.19 ± 0.06 | 0.219 ± 0.021 | 10.36 ± 0.99 |
19.2 ± 1.6 | 4.48 ± 0.13 | 0.233 ± 0.021 | 11.02 ± 0.97 | |||
30.6 ± 1.4 | 7.64 ± 0.11 | 0.249 ± 0.012 | 11.81 ± 0.56 | |||
41.4 ± 1.4 | 11.37 ± 0.11 | 0.274 ± 0.009 | 12.99 ± 0.45 | |||
48.8 ± 1.5 | 14.3 ± 0.12 | 0.293 ± 0.009 | 13.88 ± 0.44 | |||
10 | 30° | 18 | 10.1 ± 0.5 | 2.51 ± 0.01 | 0.248 ± 0.012 | 8.35 ± 0.42 |
20.1 ± 0.5 | 5.99 ± 0.01 | 0.298 ± 0.008 | 10.05 ± 0.26 | |||
30.1 ± 0.7 | 9.93 ± 0.04 | 0.33 ± 0.007 | 11.12 ± 0.25 | |||
40.5 ± 0.9 | 14.99 ± 0.07 | 0.37 ± 0.009 | 12.49 ± 0.29 | |||
49.5 ± 1.7 | 18.69 ± 0.14 | 0.378 ± 0.013 | 12.75 ± 0.45 | |||
11 | 30° | 36 | 10.3 ± 0.5 | 3.34 ± 0.67 | 0.324 ± 0.067 | 5.87 ± 1.22 |
19.2 ± 0.6 | 7.01 ± 0.05 | 0.364 ± 0.011 | 6.6 ± 0.2 | |||
29.3 ± 0.6 | 13.02 ± 0.11 | 0.444 ± 0.01 | 8.05 ± 0.17 | |||
40.2 ± 0.8 | 19.55 ± 0.22 | 0.487 ± 0.011 | 8.82 ± 0.2 | |||
50.8 ± 0.8 | 26.65 ± 0.62 | 0.525 ± 0.015 | 9.52 ± 0.27 |
Constraints | Properties | ||
---|---|---|---|
Tt−Ts | 50 °C | αf | 2.23 × 10−5 m2/s |
L | 50 mm | βf | 0.0033/K |
D | 60 mm | νf | 1.6 × 10−5 m2/s |
H | 30 mm | kf | 0.026 W/m·K |
N | 9–36 | ks | 220 W/m·K |
α | 60° | - | - |
Configuration | N | t [mm] | 1/Rth [W/K] |
---|---|---|---|
Horizontal | 36 | 0.4 | 0.543 |
Vertical [27] | 36 | 0.62 | 0.943 |
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Lee, J.B.; Kim, H.J.; Kim, D.-K. Thermal Optimization of Horizontal Tubes with Tilted Rectangular Fins under Free Convection for the Cooling of Electronic Devices. Appl. Sci. 2017, 7, 352. https://doi.org/10.3390/app7040352
Lee JB, Kim HJ, Kim D-K. Thermal Optimization of Horizontal Tubes with Tilted Rectangular Fins under Free Convection for the Cooling of Electronic Devices. Applied Sciences. 2017; 7(4):352. https://doi.org/10.3390/app7040352
Chicago/Turabian StyleLee, Jong Bum, Hyun Jung Kim, and Dong-Kwon Kim. 2017. "Thermal Optimization of Horizontal Tubes with Tilted Rectangular Fins under Free Convection for the Cooling of Electronic Devices" Applied Sciences 7, no. 4: 352. https://doi.org/10.3390/app7040352
APA StyleLee, J. B., Kim, H. J., & Kim, D.-K. (2017). Thermal Optimization of Horizontal Tubes with Tilted Rectangular Fins under Free Convection for the Cooling of Electronic Devices. Applied Sciences, 7(4), 352. https://doi.org/10.3390/app7040352