Effect of Conductivity and Radiation on Heat Dissipation Performance of Coating
Aiming at the problem of heat dissipation of electronic devices in low temperature environment, the effect of thermal conductivity and emissivity of coating on its heat dissipation performance was studied by theoretical calculations and experiments in this study. The results show that the heat dissipation performance of organic coating with emissivity of 0.7–0.95 is improved as its thermal conductivity increasing. And temperature difference between inside and surface of object is inversely proportional to thermal conductivity. That is, when thermal conductivity exceeds a certain value, it will no longer affect heat dissipation performance of coating. In addition, emissivity of coating directly affects its cooling performance, and the proper matching interaction between thermal conductivity and emissivity of coating can enhance heat dissipation effects. In the case of non-forced convection cooling, the thermal conductivity of the organic coating is preferably 2–10 W/m·K.
KeywordsCooling coatings Thermal conductivity Emissivity Heat dissipation performance
This research was financially supported by Funding Project for Academic Human Resources Development in Institutions of Higher Learning Under the Jurisdiction of Beijing Municipality.
- 2.J. Wu, S. Li, W. Yang et al., Study on heat sinks for high power LEDs. Semicond. Technol. 35, 964–967, 1027 (2010)Google Scholar
- 3.Zihui Lang, Effect of composite surface treatment on CPU radiator performance. Autom. Instrum. 155, 155–157 (2011)Google Scholar
- 5.K. Zhao, K.H. Hua, A.Z. Shui, Application of infrared radiation coating in LED heat dissipation. Bull. Chin. Ceram. Soc. 34, 172–176 (2015)Google Scholar
- 6.Y.J. Nie, L.J. Jin, J.Z. Hang, et al., Preparation and properties of waterborne nano-composite heat dissipative coating. J. Funct. Mater. 44, 736–739, 743 (2013)Google Scholar
- 7.X. Han, X. Cui, K. Ma et al., Carbon nano-capsule coating for high-power LED thermal management. Mater. Res. Innovations 19, 1112–1116 (2015)Google Scholar
- 8.H. Zhang, P. Lou, F.W. Liu et al., Effect of carbon nanotube structure on properties of infrared radiation heat sink coatings. Shanghai Coat. 54, 1–5 (2016)Google Scholar