A new leakage detection method of molten salt tank and its experimental verification and optimization

熔盐 泄漏(经济) 泄漏 电阻器 短路 热电偶 核工程 电气工程 工程类 电压 材料科学 石油工程 冶金 环境工程 宏观经济学 经济
作者
Yuhang Zuo,Zhonghua Huang,Hui Zhao,Mingrui Zhang,Fangzheng Cheng,Hua Shi,Hao Zhou
出处
期刊:Journal of Renewable and Sustainable Energy [American Institute of Physics]
卷期号:14 (4) 被引量:1
标识
DOI:10.1063/5.0093179
摘要

Molten salt tank leak detection technology is essential for the timely detection and handling of leaks. Current common thermocouple leak detection technology cannot meet the demand, and more efficient leak detection technology is urgently needed. In this paper, a molten salt tank leakage detection circuit based on the conductivity of high-temperature molten salt is proposed for the first time. Its feasibility is verified by the experimental results of a lab-scale tank foundation experimental system, and a parametric analysis is carried out to optimize the circuit layout. The results show that when molten salt leaks to the measurement point of the circuit, the voltage of the constant resistor in the circuit first rises rapidly, then drops rapidly, and finally, reaches a steady value. The vertical spacing, arrangement depth, and operating temperature significantly influence the detection effect. To ensure the rapid and continuous detection of molten salt tank leakage, the vertical spacing should be less than 50 mm. The arrangement depth should be as close as possible to the bottom of the molten salt tank, preferably within 150 mm. The decrease in the operating temperature significantly deteriorates the continuous detection effect of the circuit. When the detection circuit is used in the cold molten salt tank of concentrating solar power plants, timely circuit detection signal processing and prompt mechanisms are required to ensure that the leakage accident is not missed.
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