A non-contact tube-side fluid temperature measurement method based on the temperature measurement of the outer wall of the pipeline

Abstract

The invention discloses a non-contact tube-side fluid temperature measurement method based on the temperature measurement of the outer wall of the pipeline. By collecting the parameters of the pipeline and the external environment and determining the flow rate of the internal fluid, the heat transfer process of the pipeline is divided into the natural convection flow between the outer wall of the pipeline and the air. Heat transfer, pipe wall heat conduction, and forced convection heat transfer between the inner wall of the pipe and water. After establishing the radial heat transfer model of the pipe, the heat transfer expression is obtained, and the expression is iteratively calculated for many times to obtain the required Fluid temperature value in the tube pass. The method realizes the non-contact measurement of the fluid temperature in the tube side, has good applicability, improves the measurement accuracy and detection efficiency under the premise of ensuring real-time performance, and is applicable to the rapid measurement of the fluid temperature in the tube side under various circumstances.

Description

technical field [0001] The invention relates to a tube-side fluid temperature measurement method, in particular to a non-contact tube-side fluid temperature measurement method based on a pipeline radial heat transfer model and pipeline outer wall temperature measurement, and belongs to the technical field of fluid measurement. Background technique [0002] Fluid temperature is an important parameter in the field of industry and scientific research, and its accurate and rapid measurement plays a decisive role in industrial production and process control. [0003] Common fluid temperature measurement methods include direct contact measurement and indirect measurement. Direct contact measurement methods, such as patents CN203452771U, CN102998000A, etc., directly contact the sensor with the measured object, collect the temperature information of the measured fluid, and complete the direct temperature measurement process. The method is simple, direct, and accurate in measurement...

AI Technical Summary

Problems solved by technology

When this method is used to measure the temperature of the tube-side fluid, the volume of the water calorimeter used should be sufficient to accommodate the pipeline, which is difficult to achieve in practical applications.

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