Numerical evaluation of the measurement error of temperature by surface thermocouples in the conditions of incomplete thermal contact with object of measurement

Abstract

One-dimensional and two-dimensional models of heat transfer are given in operation for research of the main characteristics of process of temperature measurement by means of surface thermocouples. Results of numerical evaluations of the relative error of the measurement arising owing to existence of air gap between a sensitive element of the thermocouple and object of measurement are provided. It is revealed that the measurement error in case of observance of necessary time of heating up (set minimum required time of measurement) can be lowered to level of an allowed error.

Modeling of the polymerization process of the insulating layer of cable thermocouples

“…At present, in spite of the large-scale experimental [10] and theoretical [11] studies of heat and mass transfer processes that take place in the manufacture of thermocouple products, the physical theory and the mathematical basis for the thermal processes that occur in the manufacture of cable thermocouples have not been developed yet. The latter is due to the complexity of calculating the characteristics of heat transfer processes occurring under conditions of intense thermochemical (polymerization) transformations in a small (up to 1•10 -3 m) one.…”

Process Simulating of Heat Transfer in High-temperature Thermocouples

“…Herewith simulations of thermoelectric converters temperatures from the standpoint of capabilities error estimates and others metrological characteristics paid very few attentions. Such questions considered in [2][3][4][5][6], however at productions problem in works [2,3] lose sight of features detail of construction thermoelectric converters (considered only direction, corresponding junction of thermocouples).…”