Thermal conductivity refers to the heat transfer between a 1m thick material with a temperature difference of 1 degree on both sides of the surface under stable heat transfer conditions within 1 hour, through an area of 1 square meter.
Heat transfer coefficient refers to the stable heat transfer conditions, 1m thick material, the temperature difference of the surface on both sides is 1 degree, within 1 hour, through 1 square meter area of heat transmission.
Thermal conductivity refers to the heat transferred through 1 square meter area within 1 hour for a 1m thick material with a temperature difference of 1 degree on both sides under stable heat transfer conditions.<br>