Use of the principle of equivalent operating time in assessing the reliability of CCGT equipment

Radin, Yu. A.; Конторович, Т. С.

doi:10.1007/s10749-012-0319-8

Cited by 6 publications

(2 citation statements)

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“…After coating process, a residual stress is imposed during cooling. Therefore, a thicker coating may cause the more thermal and residual stresses at the interface between the top and bond coats than a thin coating, but the thickness difference about ~100 μm was tiny to affect the stresses generated on the interface so that the implication was negligible on thermal durability [38]. The microstructures in the bond coats of all of the TBCs prepared using the HVOF process showed a similar status with a dense microstructure, independent of feedstock powder.…”

Section: Microstructure Of As-prepared Tbcsmentioning

confidence: 97%

Thermal durability and fracture behavior of layered Yb-Gd-Y-based thermal barrier coatings in thermal cyclic exposure

Jung

et al. 2017

Surface and Coatings Technology

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The effects of structural design on the thermal durability of Yb-Gd-Y-based thermal barrier coatings (TBCs) were investigated through thermal cyclic exposure tests, such as furnace cyclic thermal fatigue (FCTF) and jet engine thermal shock (JETS) tests. The effects of composition in the bond coat and feedstock purity for the buffer layer on its lifetime performance were also examined. To overcome the drawbacks of Yb-Gd-Y material with poor thermal durability due to poor mechanical properties and low coefficient of thermal expansion, a buffer layer was introduced in the Yb-Gd-Y-based TBC systems. In the FCTF tests, the TBC with the CoNi-based bond coat and the buffer layer of regular purity showed a longer lifetime performance than other TBCs, especially the TBCs without the buffer layer.In the JETS tests, the TBC with the Ni-based bond coat and the buffer layer of high purity showed a sound condition after 2000 cycles, showing better interfacial stability for TBC with the Ni-based bond coat rather than that with the CoNi-based bond coat in the single layer coatings without the buffer layer. The buffer layer effectively enhanced the thermal durability in slow temperature change, while the bond-coat composition and the feedstock purity for the buffer layer were found to be important factor to improve the thermal durability of the TBC in fast temperature change. Finally, these research findings allow us to control the structure, composition, and feedstock purity in TBC system for improving the thermal durability in cyclic thermal environments.

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Section: Microstructure Of As-prepared Tbcsmentioning

confidence: 97%

Thermal durability and fracture behavior of layered Yb-Gd-Y-based thermal barrier coatings in thermal cyclic exposure

Jung

et al. 2017

Surface and Coatings Technology

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“…Для расчета эквивалентной выработки ресурса τ экв для газовых и паровых турбин предлагается следующая формула [13,14]:…”

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The Efficiency of Combined-Cycle CHP Plant With Variable Electric Loads, Taking Into Account the Wear and Tear of Equipment

Aminov¹,

Garievskii²

2018

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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The economic efficiency of attracting CHPPs to cover the variable zone of daily electrical load schedules was investigated. The estimation of resource and economic performance of combined -cycle HPPs using the example of PGU-450T taking into account equipment wear under different operating conditions in the daily and weekly sections and different composition of the operating equipment has been performed and optimal load regimes have been determined.

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Monitoring the Thermal Stress State in Steam Turbines

Radin¹,

Конторович²,

Golov³

2020

Power Technol Eng

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Use of the principle of equivalent operating time in assessing the reliability of CCGT equipment

Cited by 6 publications

References 0 publications

Thermal durability and fracture behavior of layered Yb-Gd-Y-based thermal barrier coatings in thermal cyclic exposure

Thermal durability and fracture behavior of layered Yb-Gd-Y-based thermal barrier coatings in thermal cyclic exposure

The Efficiency of Combined-Cycle CHP Plant With Variable Electric Loads, Taking Into Account the Wear and Tear of Equipment

Monitoring the Thermal Stress State in Steam Turbines

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