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

    SeriesVTT Technology
    Number216

    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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    title = "Performance of high temperature materials for efficient power plant: the water side challenge",
    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.",
    author = "Pertti Auerkari and Sanni Yli-Olli and Sami Penttil{\"a} and Satu Tuurna and Rami Pohja",
    year = "2015",
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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

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    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).