Abstract:

Currently, the leakage of drain pipeline values in power plants is detected automatically using the principle of heat transfer. However, existing studies have not yet analyzed the flow and heat transfer of the fluid in a pipeline during valve leakage. Furthermore, research on the arrangement of temperature measurement points and the accuracy requirements of temperature measurements is lacking. To address these shortcomings, this study uses a computational fluid dynamic simulation to investigate heat transfer and flow in pipelines when valve leakage occurs. In addition, the influence of different pipeline diameters and insulation materials on differences in the measured temperatures and the amount of leakage is analyzed. The findings of this study provide a reference for the real-time monitoring of dynamic changes in the flow near the valve and the diagnosis of leakage faults of drain valves on engineering sites.

Key words: drain, valve, computational fluid dynamic, Fluent software