Heat Insulation and Air Flow Suppression Using Carbon Nanotube Forest Device
Date Issued
2015
Date
2015
Author(s)
Chen, Chih-Chung
Abstract
Carbon nanotube is a remarkable research topic since it has been discovered. It is believed that carbon nanotube has the potential to be applied in many different fields due to its great property. Carbon nanotube has high thermal conductivity, making it an ideal heat transfer medium for various applications. Furthermore, the special geometry of carbon nanotube also makes it has the potential to become a heat insulation device. In this study, the capability of heat insulation of carbon nanotube is discovered by experimental method. By studying the heat transfer coefficient above the surface of carbon nanotube, the affect between carbon nanotube and natural convection will be exposed. The capability of heat insulation of different kinds of carbon nanotube is compared in the study. Carbon nanotube can suppress 60% of natural convection of the surface. The heat transfer coefficient is reduced to 43% of the original value. The capability of heat insulation will increase with the height of carbon nanotube. The single layer carbon nanotube with the height which is more than 12μm has the best capability of heat insulation. The capability of heat insulation of non iron-filled carbon nanotube is better than iron-filled carbon nanotube. Multiple layers carbon nanotube do not have the capability of heat insulation. This study also shows that the capability of heat insulation of carbon nanotube will also increase with the temperature difference between the surface and the environment. When the temperature difference between the surface and the environment is more than 70°C, carbon nanotube will have the best capability of heat insulation.
Subjects
Carbon nanotube
Iron-filled carbon nanotube
Natural convection
Microscale surface structure
Heat insulation
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-104-R02522611-1.pdf
Size
23.54 KB
Format
Adobe PDF
Checksum
(MD5):3343ee576c3fcfdf6a8cf3036990184e