What is the difference between the heat transfer coefficient and the thermal conductivity?
Release Time:
2016-07-04
The heat transfer coefficient was formerly known as the overall heat transfer coefficient. Current national standards have unified the name to heat transfer coefficient. The heat transfer coefficient K value refers to the amount of heat transferred per 1 square meter in 1 hour under stable heat transfer conditions, with a temperature difference of 1 degree (K, ℃) between the air on both sides of the enclosure structure. The unit is watts per square meter-degree (W/㎡·K, where K can be replaced by ℃). The thermal conductivity refers to the amount of heat transferred per 1 square meter in 1 hour under stable heat transfer conditions, with a temperature difference of 1 degree (K, ℃) between the surfaces of a 1m thick material. The unit is watts per meter-degree (W/m•K, where K can be replaced by ℃).
The heat transfer coefficient was formerly known as the overall heat transfer coefficient. Current national standards have unified the name to heat transfer coefficient. The heat transfer coefficient K value refers to the amount of heat transferred through 1 square meter of area in 1 hour under stable heat transfer conditions, with a temperature difference of 1 degree (K, ℃) between the air on both sides of the enclosure structure. The unit is watts per square meter-degree (W/㎡·K, where K can be replaced by ℃).
Thermal conductivity refers to the amount of heat transferred through 1 square meter of area in 1 hour under stable heat transfer conditions, with a temperature difference of 1 degree (K, ℃) between the surfaces of a 1m thick material. The unit is watts per meter-degree (W/m•K, where K can be replaced by ℃). Thermal conductivity is related to factors such as the composition and structure of the material, density, moisture content, and temperature. Materials with an amorphous structure and lower density have lower thermal conductivity. Materials with lower moisture content and temperature have lower thermal conductivity. Materials with low thermal conductivity are usually called insulation materials, while materials with thermal conductivity below 0.05 watts per meter-degree are called high-efficiency insulation materials.
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