Calculations show that to prevent the oscillatory instability of the flow in a PK-47 once-through boiler, it is necessary to install /12 mm orifice plates at the inlet of its bottom radiant section. Load-reduction tests on the boiler with such plates of a 200-MW power unit at constant turbine inlet pressure confirm the reliable operation of the unit in a load range of 80 – 200 MW.
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References
V. A. Lokshin, D. F. Peterson, and A. L. Schwarz (eds.), Standard Methods of Hydraulic Design for Power Boilers, Hemisphere, New York (1988).
L. M. Yanchuk, L. M. Kofman, A. V. Khudyak, and Yu. G. Obikhod, “Reliability of a gas-fired once-through boiler at low loads,” Élektr. Stantsii, No. 7 (1975).
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Translated from Élektricheskie Stantsii, No. 1, January 2013, pp. 49 – 54.
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Belyakov, I.I., Breus, V.I. & Barannikov, A.B. Using thermal test data to determine the minimum load of a 200-MW power unit with a PK-47 boiler at the Zainsk power station. Power Technol Eng 47, 133–138 (2013). https://doi.org/10.1007/s10749-013-0410-9
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DOI: https://doi.org/10.1007/s10749-013-0410-9