Measurements and numerical simulations for optimization of the combustion process in a utility boiler

A. Vikhansky, E. Bar-Ziv, B. Chudnovsky, A. Talanker, E. Eddings, A. Sarofim

    Research output: Contribution to journalArticlepeer-review

    28 Scopus citations

    Abstract

    A three-dimensional computational fluid dynamics code was used to analyse the performance of 550MW pulverized coal combustion opposite a wall-fired boiler (of IEC) at different operation modes. The main objective of this study was to prove that connecting plant measurements with three-dimensional furnace modelling is a cost-effective method for design, optimization and problem solving in power plant operation. Heat flux results from calculations were compared with measurements in the boiler and showed good agreement. Consequently, the code was used to study hydrodynamic aspects of air-flue gases mixing in the upper part of the boiler. It was demonstrated that effective mixing between flue gases and overfire air is of essential importance for CO reburning. From our complementary experimental-numerical effort, IEC considers a possibility to improve the boiler performance by replacing the existing OFA nozzles by those with higher penetration depth of the air jets, with the aim to ensure proper mixing to achieve better CO reburning.

    Original languageEnglish
    Pages (from-to)391-401
    Number of pages11
    JournalInternational Journal of Energy Research
    Volume28
    Issue number5
    DOIs
    StatePublished - 1 Apr 2004

    Keywords

    • CFD
    • Coal combustion
    • Tuning
    • Utility boilers

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