Performance of high temperature materials for efficient power plant: the water side challenge

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

Abstract

Improved steam plant efficiency via elevated temperature and pressure levels can be justified if it is more than compensated by the return on investment and other benefits like reduced emissions. The balance is a moving target with simultaneous shifts in relative cost, availability and acceptability of fuels, process development, regulation and operating modes, but technical limits are partly set by the performance of materials in some critical high temperature components of the plant. For optimal material solutions, one limiting factor is the water side oxidation resistance at highest operating temperatures and pressures that extend to the supercritical (SC) range. In this paper, selected materials and modelling options are compared for components where waterside oxidation can contribute by limiting the service life. The implications are discussed for future service thermal plants that increasingly need to accommodate cyclic service, fast ramping and reduced minimum loads. The results from recent materials development programs have not been able to circumvent all consequences from counteracting features in materials properties, so that the overall progress towards higher maximum temperatures has been slow, and the improvements in oxidation or corrosion resistance tend to be associated with significant direct and indirect alloying cost. The constraints from fluctuating demand in plant operation are likely to grow in importance, and the design codes and other guidelines include only partial solutions and tools to account for such trend. For example, the life-limiting contributions of high temperature oxidation and corrosion via lost load-bearing wall thickness is more easily accommodated than impact from increased growth rates of cracks and defects. The solutions are however likely to be only partly directly related to the materials that define the life-limiting boundaries for a given component and its process environment.
Original languageEnglish
Title of host publication Proceedings of the 7th International Symposium on Supercritical Water-Cooled Reactors (ISSCWR 2015)
PublisherVTT Technical Research Centre of Finland
Number of pages8
EditionUSB stick
ISBN (Electronic)978-951-38-8289-1
Publication statusPublished - 2015
MoE publication typeB3 Non-refereed article in conference proceedings
Event7th International Symposium on Supercritical Water-Cooled Reactors, ISSCWR-7 - Helsinki, Finland
Duration: 15 Mar 201518 Mar 2015

Publication series

NameVTT Technology
Number216
ISSN (Electronic)2242-1211

Conference

Conference7th International Symposium on Supercritical Water-Cooled Reactors, ISSCWR-7
Abbreviated titleISSCWR-7
CountryFinland
CityHelsinki
Period15/03/1518/03/15

Fingerprint

Power plants
Oxidation resistance
Water
Bearings (structural)
Temperature
Thermooxidation
Alloying
Service life
Corrosion resistance
Costs
Materials properties
Steam
Availability
Corrosion
Cracks
Oxidation
Defects

Cite this

Auerkari, P., Yli-Olli, S., Penttilä, S., Tuurna, S., & Pohja, R. (2015). Performance of high temperature materials for efficient power plant: the water side challenge. In Proceedings of the 7th International Symposium on Supercritical Water-Cooled Reactors (ISSCWR 2015) (USB stick ed.). [2099] VTT Technical Research Centre of Finland. VTT Technology, No. 216
Auerkari, Pertti ; Yli-Olli, Sanni ; Penttilä, Sami ; Tuurna, Satu ; Pohja, Rami. / Performance of high temperature materials for efficient power plant: the water side challenge. Proceedings of the 7th International Symposium on Supercritical Water-Cooled Reactors (ISSCWR 2015). USB stick. ed. VTT Technical Research Centre of Finland, 2015. (VTT Technology; No. 216).
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Auerkari, P, Yli-Olli, S, Penttilä, S, Tuurna, S & Pohja, R 2015, Performance of high temperature materials for efficient power plant: the water side challenge. in Proceedings of the 7th International Symposium on Supercritical Water-Cooled Reactors (ISSCWR 2015). USB stick edn, 2099, VTT Technical Research Centre of Finland, VTT Technology, no. 216, 7th International Symposium on Supercritical Water-Cooled Reactors, ISSCWR-7, Helsinki, Finland, 15/03/15.

Performance of high temperature materials for efficient power plant: the water side challenge. / Auerkari, Pertti; Yli-Olli, Sanni; Penttilä, Sami; Tuurna, Satu; Pohja, Rami.

Proceedings of the 7th International Symposium on Supercritical Water-Cooled Reactors (ISSCWR 2015). USB stick. ed. VTT Technical Research Centre of Finland, 2015. 2099 (VTT Technology; No. 216).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

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T1 - Performance of high temperature materials for efficient power plant: the water side challenge

AU - Auerkari, Pertti

AU - Yli-Olli, Sanni

AU - Penttilä, Sami

AU - Tuurna, Satu

AU - Pohja, Rami

PY - 2015

Y1 - 2015

N2 - Improved steam plant efficiency via elevated temperature and pressure levels can be justified if it is more than compensated by the return on investment and other benefits like reduced emissions. The balance is a moving target with simultaneous shifts in relative cost, availability and acceptability of fuels, process development, regulation and operating modes, but technical limits are partly set by the performance of materials in some critical high temperature components of the plant. For optimal material solutions, one limiting factor is the water side oxidation resistance at highest operating temperatures and pressures that extend to the supercritical (SC) range. In this paper, selected materials and modelling options are compared for components where waterside oxidation can contribute by limiting the service life. The implications are discussed for future service thermal plants that increasingly need to accommodate cyclic service, fast ramping and reduced minimum loads. The results from recent materials development programs have not been able to circumvent all consequences from counteracting features in materials properties, so that the overall progress towards higher maximum temperatures has been slow, and the improvements in oxidation or corrosion resistance tend to be associated with significant direct and indirect alloying cost. The constraints from fluctuating demand in plant operation are likely to grow in importance, and the design codes and other guidelines include only partial solutions and tools to account for such trend. For example, the life-limiting contributions of high temperature oxidation and corrosion via lost load-bearing wall thickness is more easily accommodated than impact from increased growth rates of cracks and defects. The solutions are however likely to be only partly directly related to the materials that define the life-limiting boundaries for a given component and its process environment.

AB - Improved steam plant efficiency via elevated temperature and pressure levels can be justified if it is more than compensated by the return on investment and other benefits like reduced emissions. The balance is a moving target with simultaneous shifts in relative cost, availability and acceptability of fuels, process development, regulation and operating modes, but technical limits are partly set by the performance of materials in some critical high temperature components of the plant. For optimal material solutions, one limiting factor is the water side oxidation resistance at highest operating temperatures and pressures that extend to the supercritical (SC) range. In this paper, selected materials and modelling options are compared for components where waterside oxidation can contribute by limiting the service life. The implications are discussed for future service thermal plants that increasingly need to accommodate cyclic service, fast ramping and reduced minimum loads. The results from recent materials development programs have not been able to circumvent all consequences from counteracting features in materials properties, so that the overall progress towards higher maximum temperatures has been slow, and the improvements in oxidation or corrosion resistance tend to be associated with significant direct and indirect alloying cost. The constraints from fluctuating demand in plant operation are likely to grow in importance, and the design codes and other guidelines include only partial solutions and tools to account for such trend. For example, the life-limiting contributions of high temperature oxidation and corrosion via lost load-bearing wall thickness is more easily accommodated than impact from increased growth rates of cracks and defects. The solutions are however likely to be only partly directly related to the materials that define the life-limiting boundaries for a given component and its process environment.

M3 - Conference article in proceedings

T3 - VTT Technology

BT - Proceedings of the 7th International Symposium on Supercritical Water-Cooled Reactors (ISSCWR 2015)

PB - VTT Technical Research Centre of Finland

ER -

Auerkari P, Yli-Olli S, Penttilä S, Tuurna S, Pohja R. Performance of high temperature materials for efficient power plant: the water side challenge. In Proceedings of the 7th International Symposium on Supercritical Water-Cooled Reactors (ISSCWR 2015). USB stick ed. VTT Technical Research Centre of Finland. 2015. 2099. (VTT Technology; No. 216).