METHOD OF DETERMINING THERMAL CONDUCTIVITY OF SOLID BODY OF CYLINDRICAL SHAPE UNDER STEADY TEMPERATURE CONDITION

摘要

FIELD: heating.;SUBSTANCE: essence of the method consists in heating the solid body of cylindrical shape by contact method using the pipeline with the coolant moving inside it. According to the known mass flow and temperature of the coolant its speed and flow regime is determined. According to the known speed, the coolant flow regime and the preset temperature of the inner surface of the pipeline the heat emission coefficient between the coolant and the inner surface of the pipeline is determined. According to the known temperature of the outer surface of the solid body, measured by contact or non-contact temperature meter, and the environment the heat emission coefficient between the outer surface of the solid body and the environment is determined. According to the equation of heat emission for a two-layer cylindrical wall under steady temperature condition the thermal conductivity coefficient of the solid body is determined.;EFFECT: increase in accuracy of determining the thermal conductivity coefficient of a solid body of cylindrical shape under steady temperature condition.;4 dwg