Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Modeling of thermal processes in measuring transducer for monitoring of paraffin deposits in oil pipelines N.K.A. THABET, V.S. FETISOV The measuring transducer for monitoring of paraffin deposits in oil pipelines is considered. It is based on dependency of measured heat transfer parameters from paraffin layer thickness. The transducer includes a ringshaped heater clasping the pipe. For improving transducer sensitivity it was proposed to use additional heaters which are identical to the main heater. They are positioned on both sides of the main one and serve as thermal barriers forming equithermal zones in the pipe wall and changing the temperature gradient. As a result, heat losses in the steel pipe decrease and thermal flow from the heater is redirected into the layer of paraffin deposit. It makes the transducer’s output parameters more dependent on the thickness of paraffin sediments. Temperature sensors are placed on the pipe outer surface just under the main heater. The modeling of thermal process in the proposed transducer has been carrying out within the ELCUT program environment. The results of modeling are discussed. It was found out that the most preferable process parameters for measuring are maximal relative temperature for the heating stage when the thermodynamic balance is being achieved and relative temperature for the moment corresponding to ≈1/10 of cooling stage duration. Keywords: oil pipeline, paraffin deposits, temperature sensor, heater, thermal barrier, modeling. DOI: 10.25791/pribor.11.2019.1004 Contacts: - Pp. 32-41.