Study on the Natural Convection Heat-Transfer Enhancement in Radial Heat Sink Using the Perforation and Flow Guide

Title & Authors
Study on the Natural Convection Heat-Transfer Enhancement in Radial Heat Sink Using the Perforation and Flow Guide
Jeon, Sora; Li, Bin; Byon, Chan;

Abstract
In this study, we numerically investigate the thermal performance of an enhanced radial heat sink with a perforation and chimney structure. We estimate the thermal performance of the enhanced radial heat sink, and compared it with that of a conventional radial heat sink. The results show that the radial heat sink with perforation has a higher thermal performance when either of the diameter and the number of perforations is high. With regards to the radial heat sink with a chimney structure, we investigate primarily the effect of the fin number, and the spacing between the chimney and the base plate on the thermal performance. The results show that there are optimal values for the fin number and the spacing between chimney and base plate. In addition, the enhanced radial heat sinks have maximum thermal performance when facing upward ($\small{0^{\circ}}$), while it has worst performance when facing sideward ($\small{90^{\circ}}$). The perforation and chimney are shown to cause thermal performance enhancements of 17% and 20%, respectively, compared with a conventional radial heat sink. The proposed method is useful for starting business, and is useful in terms of venture and entrepreneurship.
Keywords
Language
Korean
Cited by
References
1.
Kim, T. H., Do, K. H. and Kim, D. K., 2011, "Closed form Correlations for Thermal Optimization of Platedfin Heat Sinks Under Natural Convection," International Journal of Heat and Mass Transfer, Vol. 54, pp. 1210-1216.

2.
Pakrouh, P., Hosseini, M. J., Ranjbar, A. A. and Bahrampoury, R., 2015, "A Numerical Method for PCM-based Pin Fin Heat Sinks Optimization," Energy Conversion and Management, Vol. 103, pp. 542-552.

3.
Li, X., Feng, J., Feng, Q. and Wang, Q., 2005, "Development of a Plate-pin Fin Heat Sink and its Performance Comparisons with a Plate Fin Heat Sink," Applied Thermal Engineering, Vol. 25, pp. 173-182.

4.
Yu, S. H, Lee, K. S. and Yook, S. J., 2010, "Natural Convection Around a Radial Heat Sink," International Journal of Heat and Mass Transfer, Vol. 53, pp. 2935-2938.

5.
Jang, D., Lee, K. S. and Yook, S. J., 2014, "Optimum Design of a Radial Heat Sink with a Fin-height Profile for High-power LED Lighting Applications," Applied Energy., Vol. 116, pp. 260-268.

6.
Jung, T. S. and Kang, H. K., 2013, "Investigation of Natural Convective Heat Flow Characteristics of Heat Sink," Trans. Korean Soc. Mech. Eng. B, Vol. 37, No. 1, pp. 27-33.