Numerical investigation on ballooning and rupture of a Zircaloy tube subjected to high internal pressure and film boiling conditions

Nguyen, Van Toan; Kim, Hyochan; Kim, Byoung Jae

doi:10.1016/j.net.2023.04.002

Cited by 1 publication

(3 citation statements)

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“…Based on chemical analysis and creep strength analysis, it was determined that prolonged temperatures exceeding the tube's operating limit were the cause of the failure. Paper [27] presents a simulation of tube rupture in the presence of a boiling film. Attention was drawn to the fact that this phenomenon itself has an impact on tube failure.…”

Section: Literature Researchmentioning

confidence: 99%

“…Attention was drawn to the fact that this phenomenon itself has an impact on tube failure. The behavior of the tube is characteristic, resembling creep ballooning [27]. In each of the cases mentioned above, it was strongly emphasized that modeling the operation of the components was very helpful in identifying the reasons for the boiler failures.…”

Section: Literature Researchmentioning

confidence: 99%

“…In each of the cases mentioned above, it was strongly emphasized that modeling the operation of the components was very helpful in identifying the reasons for the boiler failures. Case [27] demonstrates that comprehending the mechanism of tube failure due to the occurrence of film boiling would be practically impossible without conducting computer modeling. Similarly, this is the case in the presented analysis.…”

Section: Literature Researchmentioning

confidence: 99%

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Analysis of the Causes of the Emergency Shutdown of Natural Gas-Fired Water Peak Boilers at the Large Municipal Combined Heat and Power Plant

Trojan,

Dzierwa,

Taler

et al. 2023

Energies

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The paper presents a cause-and-effect analysis of the failure of a 130 MWt gas-fired water boiler. The fault was a rupture of the helically finned tubes in the first rows of the second-stage water heater (ECO2). The high frequency of failures forced the boiler user to investigate their causes. The rapid drop in water flow in the ECO2 and the tightly finned pipes suggested that the permissible operating temperature of the steel used was exceeded. The only possible way to assess the working conditions was through a CFD simulation of the operation of the ECO2. Validated with the data acquisition system, the results show that the main reason for the failure was the overheating of the first rows of finned water heater pipes, regardless of the boiler load. The high heat flux value, exceeding 500,000 W/m2, and the increased flue gas temperature in front of the ECO2, almost reaching 900 °C, affected the appearance of the boiling film, limiting the cooling of the tube wall. Heat radiation and eddies behind the tubes significantly impacted the non-uniform temperature distribution, resulting in high pipe wall stress. By analyzing the service life of the first row of pipes based on the Larson–Miller parameter, it was concluded that the pipes would fail after only a few tens of hours.

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Section: Literature Researchmentioning

confidence: 99%

Section: Literature Researchmentioning

confidence: 99%

Section: Literature Researchmentioning

confidence: 99%

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