Abstract
Combining the Capacitively Coupled Contactless Conductivity Detection (C4D) technique and the principle of cross correlation flow measurement, a new method for flow rate measurement in millimeter-scale pipes was proposed. The research work included two parts. First, a new five-electrode C4D sensor was developed. Second, with two conductivity signals obtained by the developed sensor, the flow rate measurement was implemented by using the principle of cross correlation flow measurement. The experimental results showed that the proposed flow rate measurement method was effective, the developed five-electrode C4D sensor was successful, and the measurement accuracy was satisfactory. In five millimeter-scale pipes with different inner diameters of 0.5, 0.8, 1.8, 3.0 and 3.9 mm respectively, the maximum relative difference of the flow rate measurement between the reference flow rate and the measured flow rate was less than 5%.
Highlights
Flow rate is one of the most important process parameters in many sectors, such as the chemical, pharmaceutical, petroleum, energy, and power engineering industries, etc. [1,2,3,4,5]
The aim of this work was to propose a new method for flow rate measurement in millimeter-scale pipes, combining the C4D technique and the principle of cross correlation flow measurement
On the basis of Laugere et al.’s work, we developed a new five-electrode C4D sensor in millimeter-scale pipes
Summary
Flow rate is one of the most important process parameters in many sectors, such as the chemical, pharmaceutical, petroleum, energy, and power engineering industries, etc. [1,2,3,4,5]. There is a practical need of effective techniques to measure the flow rate in millimeter-scale pipes. The constriction flowmeter, rotameter and turbine flowmeter have constriction elements or moving parts in the pipe that disturb the fluid flow and cause a pressure drop. The Coriollis flowmeter disturbs the fluid flow. This kind of flowmeter has the disadvantage of high cost. The electromagnetic flowmeter do not disturb the fluid flow, electromagnetic flowmeters have relatively high cost and their practical application in millimeter-scale pipes is limited [3,4,5,10,11]. It is necessary to seek more effective methods to solve the problem of flow rate measurement in millimeter-scale pipes
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