Lag in the temperature measurement system in performing fractional distillation of petroleum products

We carried out mathematical simulation of the temperature measurement system in performing fractional distillation of petroleum products (FDPP). To evaluate the actual lag in measuring the temperature in the process of FDPP, a special experiment was run on the basis of the mathematical model developed. It is shown that under unsteady-state conditions the error of a glass thermometer due to the phenomenon of thermal response may attain 15–25°C or more.