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Thermal conductivity, thermal resistance, thermal impedance and thermal conductivity
The thermal impedance is proportional to the thickness of the material.
K：Thermal conductivity of the sample, W / (M K) ;
Q：Heat flux perpendicular to the cross-section of heat transfer，W；
H：Sample thickness，m；
A：Cross-sectional area of a sample perpendicular to the heat flow path，m2；
△T：Sample surface temperature difference perpendicular to heat flow direction，K。
Thermal conductivity, thermal resistance, thermal impedance and thermal conductivity
The thermal impedance is proportional to the thickness of the material.
K：Thermal conductivity of the sample, W / (M K) ;
Q：Heat flux perpendicular to the cross-section of heat transfer，W；
H：Sample thickness，m；
A：Cross-sectional area of a sample perpendicular to the heat flow path，m2；
△T：Sample surface temperature difference perpendicular to heat flow direction，K。
Thermal Conductivity is defined as the difference in temperature between two surfaces of 1 degree (K, C) for a material of 1 m thickness under stable heat transfer conditions, and the amount of heat transferred through 1 m2 in W / M K, where K can be replaced by C, according to Fourier's law, thermal Conductivity K calculation:
Thermal conductivity is the inherent characteristic of materials, does not change with the thickness of materials, the size of the area. Thermal Resistance is the Resistance of heat in the heat flow path, which reflects the heat transfer capability of the medium or between the medium, and indicates the temperature rise caused by 1 w heat in the unit of C / W or K / W. The thermal resistance R can be calculated as follows:
The thermal resistance is proportional to the thickness of the material and inversely proportional to the area of the material. Thermal Impedance is the Thermal resistance per unit area. In degrees c * m 2 / W or k * m 2 / w. The Thermal Resistance Ri can be calculated as follows:
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