Heat transfer mechanism and heat insulation principle of glass fiber cloth refractory fiber
The main heat transfer medium of refractory fiber is gas, and the porosity of refractory fiber reaches more than 90%. The gas composition in the pores directly affects the thermal conductivity of refractory fiber. The heat transfer of refractory fiber is a logarithmic curve, and the thermal conductivity value rises faster when the temperature is higher than 700C.
Heat transfer refers to the spontaneous flow of heat from a high temperature area to a low temperature area, and is an energy transfer phenomenon caused by a temperature difference. In nature, no matter inside a medium or between two mediums, as long as there is a temperature difference, there will be a heat transfer process.
We call the amount of heat transferred from or to an object per unit time as heat flow. The heat flux per unit area perpendicular to the direction of heat flow is called heat flux.
According to the physical mechanism of heat transfer, there are three ways of heat transfer process: heat conduction, convection and radiation.