AN IMPROVED ELECTRICAL-CONDUCTANCE SENSOR FOR VOID-FRACTION MEASUREMENT IN A HORIZONTAL PIPE
- Authors
- Ko, Min Seok; Lee, Bo An; Won, Woo Youn; Lee, Yeon Gun; Jerng, Dong Wook; Kim, Sin
- Issue Date
- Dec-2015
- Publisher
- KOREAN NUCLEAR SOC
- Keywords
- Conductance Sensor; Flow Pattern; Void Fraction; Wire-mesh Sensor
- Citation
- NUCLEAR ENGINEERING AND TECHNOLOGY, v.47, no.7, pp 804 - 813
- Pages
- 10
- Journal Title
- NUCLEAR ENGINEERING AND TECHNOLOGY
- Volume
- 47
- Number
- 7
- Start Page
- 804
- End Page
- 813
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/8865
- DOI
- 10.1016/j.net.2015.06.015
- ISSN
- 1738-5733
- Abstract
- The electrical-impedance method has been widely used for void-fraction measurement in two-phase flow due to its many favorable features. In the impedance method, the response characteristics of the electrical signal heavily depend upon flow pattern, as well as phasic volume. Thus, information on the flow pattern should be given for reliable void-fraction measurement. This study proposes an improved electrical-conductance sensor composed of a three-electrode set of adjacent and opposite electrodes. In the proposed sensor, conductance readings are directly converted into the flow pattern through a specified criterion and are consecutively used to estimate the corresponding void fraction. Since the flow pattern and the void fraction are evaluated by reading conductance measurements, complexity of data processing can be significantly reduced and real-time information provided. Before actual applications, several numerical calculations are performed to optimize electrode and insulator sizes, and optimal design is verified by static experiments. Finally, the proposed sensor is applied for air-water two-phase flow in a horizontal loop with a 40-mm inner diameter and a 5-m length, and its measurement results are compared with those of a wire-mesh sensor. Copyright (C) 2015, Published by Elsevier Korea LLC on behalf of Korean Nuclear Society.
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Collections - College of Engineering > School of Energy System Engineering > 1. Journal Articles
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