Theoretical aspects and practical realization of a new method of fast measurement of thermal conductivity of coating materials (like deposits on wall and tubes of the boilers using fossil fuel, or high-temperature ceramics and adhesive materials) are presented. The method is based on analytical solution of the problem of unsteady heat transfer from the heated probe with coating to the environmental air. Several models of the phenomenon, taking into account convection and thermal radiation components of heat transfer, are described. The records of the probe temperature are processed numerically and compared with calculated values based on analytical solution. The best fit between the curves of recorded and calculated temperatures yields thermal conductivity value used as a parameter of the best fitting. This approach was applied to measurement of thermal properties of Fouling deposition in a coal-firing boiler. It was also demonstrated how extended version of the method allows one to represent the thermal conductivity of coating as a piecewise constant function of temperature, using a single record of the probe cooling curve. With a specially designed software for efficient calculation according to developed mathematical model, the whole experiment in the range 1500 °K–300 °K takes no more than 35–40 min, including processing on a regular PC. Validation of the suggested method was carried out in a special experiment with the substance of known thermal conductivity (Corn oil). The method was applied to Fouling depositions of two kinds of fuel—Columbian bituminous coal and Russian bituminous coal. It was demonstrated that Fouling in these two cases is characterized by significantly different thermal conductivity which also changes markedly with temperature.

介绍了一种快速测量涂层材料（如使用化石燃料的锅炉壁和管子上的沉积物，或高温陶瓷和粘合材料）的导热率的新方法的理论方面和实际实现。该方法基于对从带有涂层的加热探针到环境空气的不稳定传热问题的分析解决方案。描述了该现象的几种模型，其中考虑了热传递的对流和热辐射成分。对探头温度的记录进行数字处理，并与基于解析溶液的计算值进行比较。记录的温度曲线和计算的温度曲线之间的最佳拟合会产生用作最佳拟合参数的导热系数值。该方法用于测量燃煤锅炉结垢沉积物的热性能。还证明了该方法的扩展版本如何使用探针冷却曲线的单个记录将涂层的导热率表示为温度的分段恒定函数。借助专门设计的软件，可以根据开发的数学模型进行高效计算，整个实验在1500°K–300°K范围内进行的时间不超过35–40分钟，包括在常规PC上进行处理。建议方法的验证是在一个特殊的实验中使用已知导热系数的物质（玉米油）进行的。该方法被应用于哥伦比亚燃料油和俄罗斯燃料油两种燃料的结垢沉积。