THE EXPERIMENTAL DETERMINATION OF THE EQUIVALENT COEFFICIENT OF HEAT TRANSMITTERS
Keywords:heat transfer coefficient, experimental research, thermal conductivity, equivalent thermal conductivity coefficient, standard uncertainty.
The coefficient of thermal conductivity as one of heat transfer parameters is investigated. This option is cataloged for most building materials. This makes it easy to determine the amount of heat transmitted through the building mantle. It is much more difficult to calculate the amount of heat transferred for premises, the walls of which are made of different materials, which makes their heat conducting surfaces heterogeneous. In addition, the calculation is complicated when the temperature along the surface is non-uniform. The definition of the equivalent heat conduction coefficient for a certain camera is proposed. The coefficient of equivalent heat conductivity allows to calculate the value of the transferred heat by multiplying it by the total surface area of the camera walls. An experimental method for determining the equivalent coefficient of thermal conductivity is proposed. A theoretical analysis of the determination of the error of the equivalent thermal conductivity coefficient based on the uncertainty theory in the measurements is carried out.