METHOD FOR DETERMINATION OF RESIDUAL LIFE OF THERMAL ENCLOSURES OF HIGH-TEMPERATURE UNITS Russian patent published in 2020 - IPC G01N25/72 

FIELD: heat power engineering.

SUBSTANCE: invention relates to determination of residual life of thermal enclosures of high-temperature units. Summary: residual resource of thermal enclosures of high-temperature units is determined, using as reliability indexes reliability criteria of strength for compression and for expansion, defined by the formula: k_{compression channel}=ΣN_compression/ΣN^additional_compression, wherein ΣN_compression—the sum totals values of compression defined by formula: N_compression=σ_compression·(z+1), where z is a coefficient which takes into account lengths of compression and expansion zones, in which temperature stresses exceed allowable ones, σ_compression—occurring stresses in compression zone, ΣN^additional_compression—the sum values of the total compression rates at the same point at the same time is similarly ΣN_compression, but at a value of σ_compression equal to the limit of the material strength, and n_residual residual resource determined by the formula: n_residual=ΣN_compression/ΣN_{mean compression} − n, where ΣN_{mean compression} is the arithmetic mean value of the total compression ratios per one cycle; n is number of high-temperature unit cycles, which have passed at the moment after replacement of lining, wherein calculation of strength reliability criterion and residual life for expansion are determined by similar formulas.

EFFECT: obtaining data on residual life of thermal enclosures of high-temperature units during operation and use of said values during their operation.

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