US 12,460,983 B2
Method for determining steam leakage
Chian-Wei Tzeng, Taipei (TW); Xue-Wen Yang, Taipei (TW); Kwei-Yuan Su, Taipei (TW); Chuan-Sheng Kao, Taipei (TW); and Sheng-Kai Chan, Taipei (TW)
Assigned to TAIWAN POWER COMPANY, Taipei (TW)
Filed by Taiwan Power Company, Taipei (TW)
Filed on Nov. 30, 2022, as Appl. No. 18/072,645.
Claims priority of application No. 110144850 (TW), filed on Dec. 1, 2021.
Prior Publication US 2023/0168141 A1, Jun. 1, 2023
Int. Cl. G01L 23/26 (2006.01); G05B 13/04 (2006.01); G06F 30/20 (2020.01); G06F 119/08 (2020.01)
CPC G01L 23/26 (2013.01) [G05B 13/04 (2013.01); G06F 30/20 (2020.01); G06F 2119/08 (2020.01)] 8 Claims
OG exemplary drawing
 
1. A method for determining steam leakage, comprising:
obtaining a dummy furnace tube by mechanically cutting a sample of an entire furnace tube;
simulating an operation of an actual furnace tube by pressurizing an inside of the dummy furnace tube to a plurality of different steam pressures and heating an outer wall of the dummy furnace tube to a plurality of different operating temperatures, wherein a water pressure test with a water pressure higher than a said steam pressure is performed on the dummy furnace tube before the inside of the dummy furnace tube is pressurized to the steam pressure;
installing at least one thermocouple and at least one strain gauge in an upper section, a middle section and a lower section of the dummy furnace tube to record strain values of the dummy furnace tube corresponding to the steam pressures and the operating temperatures;
providing a steam pressure graph plotted according to the steam pressures, the operating temperatures and the strain values; and
determining whether a steam leakage occurs in the actual furnace tube according to the strain values by looking up the steam pressure graph.